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ICHEM 2018

ICHEM 2018
The 2nd International Conference on High-Entropy Materials
December 9-12, 2018
Ramada Plaza Hotel, Jeju, Korea
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Program

  • Speakers
  • Program at a glance
  • Scientific Program
  • Social Program
Mon
Abstract Submission Due ~ September 10, 2018
Thu
Acceptance Notification September 20, 2018
Mon
Early Registration Due ~ October 22 ⇒ November 5, 2018
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Speakers > Keynote Speakers

Keynote Speakers

  • Prof. Brian Cantor
  • University of Brad, UK
  • Title : will be announced
  • Biography and Abstract
    [Biography and Abstract] will be announced

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  • Prof. Cemal Cem Tasan
  • Massachusetts Institute of Technology, USA
  • "Interesting Phenomena in Metastable High-Entropy Alloys"
  • Biography and Abstract
    Biography
    Close
  • Prof. Easo P. George
  • University of Tennessee, USA
  • "Recent progress in mechanical properties of high-entropy alloys"
  • Biography and Abstract
    Biography
    EDUCATION
    University of Pennsylvania Ph.D. Materials Sci. & Engineering 1985
    Indian Institute of Technology B.Tech. Metallurgical Engineering 1981
    PROFESSIONAL ACTIVITIES
    • UT-ORNL Governor’s Chair, 2017-present.
    • Adjunct Professor, Institute for Materials, Ruhr University Bochum, Germany, 2017-present.
    • Professor of Materials Design and Director, Center for Interface Dominated High Performance Materials, Ruhr University Bochum, 2014-2017.
    • Distinguished Research Staff Member, Leader of the Alloy Behavior and Design Group, Joint Faculty Professor of Materials Science and Engineering, Oak Ridge National Laboratory and University of Tennessee, 1987-2014.
    • Research Engineer, Southwest Research Institute, San Antonio, 1986-1987.
    • Postdoctoral Fellow, University of Pennsylvania, 1985-1986.
    AWARD AND HONORS
    • Invitation fellowship for senior scientists, Japan Society for Promotion of Science, 2013.
    • Top cited paper award Scripta Materialia, 2012, for 5-year period 2007-2011.
    • Fellow, TMS, 2010.
    • Outstanding symposium paper award, MRS Fall Meeting, 2008.
    • Humboldt award for senior scientists, AvH Foundation, Germany, 2000.
    • Fellow, ASM International, 1999.
    • NASA group achievement award for RTG/RHU team, Cassini mission to Saturn, 1999.
    • Sustained outstanding research award, Basic Energy Sciences, U.S. Dept of Energy.
    • Ranked 8th in the world among highly cited materials scientists, ScienceWatch, Oct 1995.
    • Beuhler award for best paper in Materials Characterization journal, 1995.
    MAIN SCIENTIFIC PUBLICATIONS
    • G. Laplanche, J. Bonneville, C. Varvenne, W. A. Curtin, E. P. George, Thermal activation parameters of plastic flow reveal deformation mechanisms in the CrMnFeCoNi high-entropy alloy, Acta Mater. 143, 257-264 (2018).
    • G. Laplanche, A. Kostka, C. Reinhart, J. Hunfeld, G. Eggeler, E. P. George, Reasons for the superior mechanical properties of medium-entropy CrCoNi compared to high-entropy CrMnFeCoNi, Acta Mater. 128, 292-303 (2017).
    • G. Laplanche, A. Kostka, O. M. Horst, G. Eggeler, E. P. George, Microstructure evolution and critical stress for twinning in the CrMnFeCoNi high-entropy alloy, Acta Mater. 118, 152-163 (2016).
    • F. Otto, A. Dlouhy, K. G. Pradeep, M. Kubenova, D. Raabe, G. Eggeler, E. P. George, Decomposition of the single-phase high-entropy alloy CrMnFeCoNi after prolonged anneals at intermediate temperatures, Acta Mater. 112, 40-52 (2016).
    • N. L. Okamoto, S. Fujimoto, Y. Kambara, M. Kawamura, Z. M. T. Chen, H. Matsunoshita, K. Tanaka, H. Inui, E. P. George, Size effect, critical resolved shear stress, stacking fault energy and solid solution strengthening in the CrMnFeCoNi high-entropy alloy, Sci. Reports 6, 35863 (2016).
    • B. Gludovatz, A. Hohenwarter, K. V. S. Thurston, H. Bei, Z. Wu, E. P. George, R. O. Ritchie, Exceptional damage-tolerance of a medium-entropy alloy CrCoNi at cryogenic temperatures, Nature Comm. 7, 10602 (2016).
    • N.L. Okamoto, K. Yuge, K. Tanaka, H. Inui, E. P. George, Atomic displacement in the CrMnFeCoNi high-entropy alloy - A scaling factor to predict solid solution strengthening, AIP Advances 6, 125008 (2016).
    • B. Gludovatz, A. Hohenwarter, D. Catoor, E. H. Chang, E. P. George, R. O. Ritchie, A fracture resistant high-entropy alloy for cryogenic applications, Science 345, 1153-1158 (2014).
    • Z. Wu, H. Bei, G. M. Pharr, E. P. George, Temperature dependence of the mechanical properties of equiatomic solid solution alloys with FCC crystal structures, Acta Mater. 81, 428-441 (2014).
    • A. Gali and E. P. George, Tensile properties of high- and medium-entropy alloys, Intermetall. 39, 74-78 (2013).
    • F. Otto, A. Dlouhy, Ch. Somsen, H. Bei, G. Eggeler, E. P. George, Influence of temperature and microstructure on the tensile properties of a CoCrFeMnNi high-entropy alloy, Acta Mater. 61, 5743-5755 (2013).
    • F. Otto, Y. Yang, H. Bei, E. P. George, Relative effects of enthalpy and entropy on the phase stability of equiatomic high-entropy alloys, Acta Mater. 61, 2628-2638 (2013).
    RESEARCH INTERESTS
    • Physical metallurgy
    • Mechanical properties
    • Environmental effects
    • High-entropy alloys, refractory alloys for high-temperature applications
    Close
  • Prof. Evan Ma
  • Johns Hopkins University, USA
  • "Reaching for unusual mechanical properties in CoCrNi medium-entropy alloy"
  • Biography and Abstract
    Biography
    EDUCATION
    Tsinghua University (thesis at California Institute of Technology)
    Ph.D., Materials Science and Engineering June 1989
     
    Tsinghua University, Beijing, China
    M.S., Materials Science and Engineering March 1985
    B.S., Materials Science and Solid State Physics June 1982
    PROFESSIONAL ACTIVITIES
    Professor 2002-present
    Dept. of Materials Science and Engineering, The Johns Hopkins University
     
    Associate Professor 1998-2002
    Dept. of Materials Science and Engineering, The Johns Hopkins University
     
    Assistant Professor 1993-1998
    Dept. of Mechanical Engineering, Louisiana State University (LSU)
     
    Visiting Assistant Professor 1992-1993
    Dept. of Mater. Sci. Eng., University of Illinois at Urbana-Champaign
     
    Research Fellow 1990-1992
    Michigan Ion Beam Laboratory, University of Michigan, Ann Arbor
     
    Postdoctoral Research Associate 1989-1990
    Department of Mater. Sci. Eng., Massachusetts Institute of Technology/
    IBM T.J. Watson Research Center (joint appointment)
     
    Graduate Research Assistant 1986-1989
    Materials Research Group, Division of Applied Sciences, Caltech
    (Advisors: Prof. M-A. Nicolet and Prof. W.L. Johnson)
     
    Research and Teaching Assistant 1982-1985
    Dept. of Eng. Physics and later Dept. of Mater. Sci. Eng., Tsinghua Univ
    AWARD AND HONORS
    • Elected Fellow, Materials Research Society (MRS), 2015
    • Elected Fellow, ASM International, 2009
    • Elected Fellow, American Physical Society (APS), 2010
    • Senior Scientist Prize, 18th International Symposium on Metastable, Amorphous and Nanocrystalline Materials (ISMANAM), 2011.
    • Thomson Reuters Highly Cited Researcher, 2002-2012, 2014, 2015 (top 1% of researchers for most cited documents in the field of materials science).
    • Materials Science Research Silver Medal (from ASM International, 2004)
    SCIENTIFIC PUBLICATIONS
    • ~320 articles in refereed journals; ~33,000 citations (Google Scholar; h=95)
    • ~218 invited talks
    10 RECENT PAPERS
    1. Muxin Yang, Dingshun Yan, Fuping Yuan, Ping Jiang, Evan Ma, and Xiaolei Wu, Dynamically reinforced heterogeneous grain structure prolongs ductility in a medium-entropy alloy with gigapascal yield strength, Proceedings of the National Academy of Sciences of the United States of America, Volume: 115 Issue: 28 Pages:7224-7229 Published: 2018
    2. Ma Yan, Yuan Fuping Yang Muxin,Ping Jiang, Evan Ma, Xiaolei Wu, Dynamic shear deformation of a CrCoNi medium-entropy alloy with heterogeneous grain structures, Acta Mater., Volume: 148 Pages:407-418 Published: 2018
    3. F. Rao, K. Y. Ding, Y. X. Zhou, Y. H. Zheng, M. J. Xia, S. L. Lv, Z. T. Song, S. L. Feng, I. Ronneberger, R. Mazzarello, W. Zhang and E. Ma, Reducing the stochasticity of crystal nucleation to enable subnanosecond memory writing, Science Vol. 358, Issue 6369, pp. 1423-1427 Published: Nov 8 2017
    4. Ma, Evan; Zhu, Ting, Towards strength-ductility synergy through the design of heterogeneous nanostructures in metals, Materials Today Volume: 20 Issue: 6 Pages: 323-331 Published: JUL-AUG 2017
    5. E. Ma and J. Ding, Tailoring structural inhomogeneities in metallic glasses to enable tensile ductility at room temperature, review in Materials Today 19 (2016) 568-579.
    6. Ding, Jun; Cheng, Yong-Qiang; Sheng, Howard; Asta, Mark; Ritchie, R.; Ma, Evan; Universal structural parameter to quantitatively predict metallic glass properties, Nature Communications Volume: 7 No: 13733 Published: DEC 12 2016
    7. Li, Qing-Jie; Li, Ju; Shan, Zhi-Wei; Ma, Evan, Surface Rebound of Relativistic Dislocations Directly and Efficiently Initiates Deformation Twinning, Physical Review Letters 117 (16) 165501 Published: OCT 11 2016
    8. D. G. Xie, Z. J. Wang, J. Sun, J. Li, E. Ma and Z. W. Shan, In situ study of the initiation of hydrogen bubbles at the aluminium metal/oxide interface, Nature Materials, Volume:14 Issue: 9 Pages:899-903 Published: SEP 2015.
    9. Ma, E, Tuning order in disorder, Nature Materials, Volume:14 Issue: 6 Pages: 547-552 Published: JUN 2015.
    10. Ding, Jun; Patinet, Sylvain; Falk, Michael L.; Cheng, YQ; Ma, Evan. Soft spots and their structural signature in a metallic glass, Proceedings of the National Academy of Sciences of the United States of America Volume: 111 Issue: 39 Pages: 14052-14056, Published: SEP 30 2014.
    Abstract
    FCC HEAs have high ductility, but their yield strength (σy) is inadequate. If processed to achieve σy>1 GPa, the strain hardening ability is then exhausted, diminishing the uniform tensile strain. Here we purposely deploy a three-level heterogeneous grain structure (HGS) in the CrCoNi MEA [1], with grain sizes spanning the nanometer to micrometer range, imparting a high σy > 1 GPa. This heterogeneity results from the ultra-low stacking fault energy (SFE), which facilitates corner twins in recrystallization and stores deformation twins and stacking faults during tensile straining. After yielding the elasto-plastic transition through load transfer and strain partitioning among grains of different sizes leads to an up-turn of the strain hardening rate, and upon further tensile straining the corner twins evolve into nanograins. This dynamically reinforced HGS leads to a sustainable strain hardening rate, a record-wide hysteresis loop in load-unload-reload stress-strain curve and hence high back stresses that are usually not obvious in single-phase homogeneous grains, and consequently a uniform tensile strain of ~25% even after yielding at GPa stress, without requiring second phase as in the heterogeneous microstructures of dual-phase or TRIP steels. When this MEA is exploited at cryogenic deformation temperatures under high strain rates, deformation twinning is rendered particularly profuse to dissipate energy, while martensitic transformation is not prevalent despite of the low-SFE, in contrast with austenitic stainless steels. This sets record-high Charpy V-notch impact fracture toughness (AK) all the way down to 4.2 K, surpassing previous cryogenic alloys in the literature.
    References
    [1]. M. Yang et al., PNAS (2018) 1807817115.
    Close
    • Prof. Haruyuki Inui
    • Kyoto University, Japan
    • "Single-crystal mechanical properties of equiatomic CrMnFeCoNi high-entropy alloy and its derivative equiatomic quaternary and ternary medium-entropy alloys"
    • Biography and Abstract
      Biography
      EDUCATION
      Osaka University Ph.D Materials Science and Engineering 1988
      Osaka University MS Materials Science and Engineering 1985
      Osaka University BS Materials Science and Engineering 1983
      PROFESSIONAL ACTIVITIES
      • Professor, Department of Materials Science and Engineering, Kyoto University, Japan (2004~Presnt)
      • Associate Professor, Department of Materials Science and Engineering, Kyoto University, Japan (1996~2004)
      • Assistant Professor, Department of Materials Science and Engineering, Kyoto University, Jpan (1989~1996)
      • Post-doctoral Fellow, Department of Materials Science and Engineering, University of Pennsylvania, U. S. A. (1988~1989)
      AWARD AND HONORS
      • The representative researchers, Grant-in-Aid for Scientific Research on Innovative Area (High-Entropy Alloys: Science of New Class of Materials Based on Elemental Multiplicity and Heterogeneity) Supported by MEXT, Japan (2018~)
      • The Distinguished Achievement (Korou) Award of The Japan Institute for Metals and Materials (2016)
      • The council member of Science Council of Japan (2014~)
      • The Tanigawa-Harris Award of The Japan Institute for Metals and Materials (2012)
      • The Meritorious (Koseki) Award of The Japan Institute for Metals and Materials (2000)
      • The Young Researcher (Shorei) Award of The Japan Institute for Metals and Materials (1992)
      • The Outstanding Young Scientist Prize of The High-Temperature Society of Japan (1988)
      MAIN SCIENTIFIC PUBLICATIONS
      • M. Higashi, S. Momono, K. Kishida, N.L. Okamoto and H. Inui, Anisotropic Plastic Deformation of Single Crystals of the MAX phase compound Ti3SiC2 Investigated by Micropillar Compression, Acta Materialia, Vol. 161 (2018), 161-170.
      • G. Laplanche, N. Wieczorek, F. Fox, S. Berglund, J. Pfetzing-Micklich, K. Kishida, H. Inui and G. Eggeler, On the Influence of Crystallography and Dendritic Microstructure on Micro Shear Behavior of Single Crystal Ni-Based Superalloys, Acta Materialia, Vol. 160 (2018), 173-184.
      • H. Inui, N.L. Okamoto and S. Yamaguchi, Review: Crystal Structures and Mechanical Properties of Fe-Zn Intermetallic Compounds Formed in the Coating layer of Galvannealed Steels, ISIS International, Vol. 58 (2018), No. 9, 1550-1561.
      • T. Maruyama, H. Matsunoshita, K. Kishida, and H. Inui, Micropillar Compression Deformation of Single Crystals of Mo5SiB2 with the Tetragonal D8l Structure, Acta Materialia, Vol. 159 (2018), 416-428.
      • K. Kabir, K. Kishida, K. Tanaka and H. Inui, Effects of Lattice Misfit on Plastic Deformation Behavior of Single-Crystalline Micropillars of Ni-Based Superalloys, Acta Materialia, Vol. 138 (2017), 119-130.
      • K. Kishida, H. Yokobayashi and H. Inui, A Formation Criterion for Order-Disorder (OD) Phases of the Long-Period Stacking Order (LPSO)-Type in Mg-Al-RE (Rear Earth) Ternary Systems, Scientific Report, Vol. 7 (2017), 12294.
      • N.L. Okamoto, J. Okumura, M. Higashi and H. Inui, Crystal Structure of’-Fe3Al8; Low-Temperature Phase of -Fe2Al5 Accompanied by an Ordered Arrangement of Al Atoms of Full Occupancy in the C-Axis Chain Sites, Acta Materialia, Vol. 129 (2017), 290-299.
      • N.L. Okamoto, S. Takemoto, Z.H.M.T. Chen, M. Yamaguchi and H. Inui, FCC Metal-Like Deformation Behavior of Ir3Nb with the L12 Structure, International Journal of Plasticity, Vol. 97 (2017), 145-158.
      • J.Y. Zhang, K. Kishida and H. Inui, Specimen Size and Shape Dependent Yield Strength in Micropillar Compression Deformation of Mo Single Crystals, International Journal of Plasticity, Vol. 92 (2017), 45-56.
      • N.L. Okamoto, K. Yuge, K. Tanaka, H. Inui and E.P. George, Atomic Displacement in the CrMnFeCoNi High-Entropy Alloy –A Scaling Factor to Predict Solid Solution Hardening, AIP Advances, Vol. 6 (2016), No. 12, 125008.
      • N.L. Okamoto, S. Fujimoto, Y. Kambara, M. Kawamura, Z-H. Chen, H. Matsunoshita, K. Tanaka, H. Inui, and E.P. George, Size Effect, Critical Resolved Shear Stress, Stacking Fault Energy, and Solid Solution Strengthening in the CrMnFeCoNi High-Entropy Alloy, Scientific Reports, Vol. 6 (2016), 35863.
      • A. Suzuki, H. Inui and T.M. Pollack, L12 Strengthened Cobalt-Base Superalloys, Annual Review of Materials Research, Vol. 45 (2015), 345-368.
      RESEARCH INTERESTS
      • Physical metallurgy
      • Plastic deformation mechanisms
      • Intermetallic compounds
      • High-entropy alloys
      Abstract
      High-entropy alloys (HEAs) comprise a novel class of scientifically and technologically interesting materials. Among these, the equatomic CrMnFeCoNi alloy with the face-centered cubic (FCC) structure and some of its derivative equiatomic quaternary and ternary alloys are noteworthy because its ductility and strength increase with decreasing temperature while maintaining outstanding fracture toughness at cryogenic temperatures. However, the origin of these excellent mechanical properties has yet to be understood clearly, because mostly of the luck of studies using their single crystals. In the present study, the plastic deformation behavior of single crystals of the FCC equatomic CrMnFeCoNi high-entropy alloy and its derivative quaternary (CrFeCoNi) and ternary (CrCoNi) medium-entropy alloys has been investigated in a temperature range of 10-1273 K. Deformation occurs via slip of the {111}<110> system exclusively in the whole temperature range for all alloys investigated. The CRSS values increase with decreasing temperature, especially below room temperature, so that the concept of ‘stress equivalence’ is obeyed for all alloys investigated. This is a clear indication that the strength of these alloys should be described by a mechanism based on solid-solution hardening. Dislocations are smoothly curved in the slip plane without any preferred line orientation, indicating no significant anisotropy in mobilities of edge and screw segments. Planar ½<110>{111} dislocations dissociate widely into Shockley partials for all alloys investigated, indicating their low stacking fault enrgies. The separation distance for the coupled Shockley partials in the equatomic CrMnFeCoNi alloy ranges from 3.5-4.5 nm near the screw orientation to 5-8 nm near the edge, yielding a stacking fault energy of 30 ± 5 mJ/m2 [1]. The separation distance for the equatomic CrCoNi alloy is much large, yielding the stacking fault energy of 11 ± 3 mJ/m2. The CRSS values extrapolated to 0 K for polycrystals of equiatomic quinary, quaternary and ternary alloys are reported to be well scaled with the mean-square atomic displacement from the regular FCC lattice points (calculated based on density-functional theory) [2]. This seems also the case for the CRSS values at 10 K for single crystals of the present three alloys, although some modifications are definitely needed. Deformation twinning occurs on the conjugate system in the form of the Lüders type deformation in the later stage of deformation at low temperatures in all of the three alloys. While deformation twinning is observed only at low temperatures (typically at 77 K) for CrMnFeCoNi and CrFeCoNi, it is observed even at room temperature for CrCoNi. This is consistent with the observed low stacking fault energy in CrCoNi. The correlation between the twinning stress and the stacking-fault energy in these alloys will be discussed.
      References (Maximum three):
      • [1] N.L. Okamoto et al., Scientific Reports, 6 (2016), 35863.
      • [2] N.L. Okamoto et al., AIP Advances, 6 (2016), 125008.
      Close
    • Prof. Hyoung Seop Kim
    • Pohang University of Science and Technology, Korea
    • "Microstructure and Deformation Mechanism Based Finite Element Simulations of High-Entropy Alloys"
    • Biography and Abstract
      Biography
      EDUCATION
      Seoul National University Ph.D. Metallurgical Engineering 1992
      Seoul National University MS Metallurgical Engineering 1988
      Seoul National University BS Metallurgical Engineering 1986
      PROFESSIONAL ACTIVITIES
      • Professor, Department of Metallurgical Engineering, Chungnam National University, Korea, March 1995 to July 2008
      • Professor, Department of Material Science and Engineering, POSTECH, Korea, August 2008 to President
      • British Council Fellow, Department of Materials, Oxford University, UK, 1997 to 1998
      • Australian Research Council Fellow, University of Western Australia, Australia, July 1998 to July 2009
      • Visiting Professor, Department of Materials Science and Engineering, University of Pennsylvania, USA, March 2005 to February 2007
      AWARD AND HONORS
      • Fellow, The Korean Academy of Science and Technology
      • Excellent Science and Technology Paper Award, The Korean Federation of Science and Technology Societies, 2007
      MAIN SCIENTIFIC PUBLICATION
      • Cryogenic strength improvement by utilizing room-temperature deformation twinning in partially recrystallized VCrMnFeCoNi high entropy alloy, Nature Comm. (2017)
      • A Model of the Ductile-Brittle Transition of Partially Crystallized Amorphous Al-Ni-Y Alloys, Acta Mater. (1999)
      • Plastic Deformation Behaviour of Fine Grained Materials, Acta Mater. 48 (2000)
      • Finite Element Analysis of Compressive Deformation of Bulk Metallic Glasses, Acta Mater. (2004)
      • Phase Mixture Modeling of the Strain Rate Dependent Mechanical Behavior of Nanostructured Materials, Acta Mater. (2005)
      • Y.Estrin, H.S.Kim, F.R.N.Nabarro, A Comment on the Role of Frank-Read Sources in Plasticity of Nanomaterials, Acta Mater. (2007)
      • Dislocation density-based finite element analysis of large strain deformation behavior of copper under high-pressure torsion, Acta Materialia (2014)
      • Numerical analysis on the formation of P-orientation near coarse precipitates in FCC crystals during recrystallization, Acta Mater. (2017)
      • Suppressed Deformation Instability in the Twinning-Induced Plasticity Steel-Cored Three-Layer Steel Sheet, Acta Materialia (2018)
      RESEARCH INTERESTS
      • Intellect design of novel material-processing-function by multi-scale Modelling
      • Materials: Nano, ultrafine, porous, powder, amorphous, glasses and composite metallic materials, high entropy alloy
      • Application: Ultrahigh strength steel, light alloy Ti & Mg, Bio mechanics, MEMS, energy parts, severe plastic deformation, additive manufacturing
      Close
    • Dr. Jaimie S. Tiley
    • Air Force Office of Scientific Research, USA
    • "Creating the perfect storm - Coupling machine learning, thermodynamic data sets, and advanced manufacturing techniques to the development of high entropy alloys."
    • Biography and Abstract
      Biography
      He has a Bachelor of Science degree in Systems Engineering from Wright State University, Masters of Science degree in Systems Engineering from Wright State University, a Masters of Science degree in Environmental Engineering from the Air Force Institute of Technology, a Masters of Science in Materials Engineering from The Ohio State University, and a Ph.D in Materials Science and Engineering from The Ohio State University. He is also a PE in Mechanical Engineering (Ohio), graduate of Air War College, and fellow of ASM International. He has over 30 years of engineering and program management experience working aerospace research programs for AFRL and LCMC, including his service as the Program Manager for the Metals Affordability Initiative, the Center for Aerospace Manufacturing Technologies, and the Institute for Science and Engineering Simulation.

      Jaimie Tiley is the Program Officer for the Multiscale Structural Mechanics and Prognosis Portfolio, and acting Program Officer for the Low Density Materials Portfolio within the Air Force Office of Scientific Research. He is currently working to address fundamental research issues related to the coupling of physics based mechanics models across different length scales, and researching low density materials for use in advanced aerospace systems. Specific research areas include the coupling of high energy diffraction and electron microscopy techniques with crystal plasticity finite element techniques, development of advanced thermodynamic and phase evolution models, and the integration of thermal and acoustic deformation models with computational fluid dynamics techniques.
      EDUCATION
      2003 PhD, The Ohio State University, Columbus, Ohio
      2001 MSE, The Ohio State University, Columbus, Ohio
      1992 MSE, Air Force Institute of Technology, Wright Patterson AFB, Ohio
      1991 MSE, Wright State University, Fairborn, Ohio
      1987 BSE, Wright State University, Fairborn, Ohio
      CAREER CHRONOLOGY (items should be in chronological order; not reverse)
      1. Oct 1987 – Mar 1992 – Program Manager and Research Engineer, Aeronautical Equipment Systems Program Office, Aeronautical Systems Center, WPAFB, OH
      2. Mar 1992 – May 2005 – Team Lead, Materials and Manufacturing Directorate, WPAFB, OH
      3. May 2005 – Dec 2014 – Senior Program Manager/Team Lead, Materials and Manufacturing Directorate, WPAFB, OH
      4. Dec 2014 – Dec 2016 – Senior Integration Lead, Plans and Programs Directorate, AFRL, WPAFB, OH
      5. Dec 2016 – Feb 2017 – Section Chief, Human Effectiveness Directorate, AFRL, WPAFB, OH
      6. Feb 2017 - Present – Program Officer, Air Force Office of Scientific Research, Arlington, VA
      AWARD AND HONORS
      • Numerous Air Force Achievement and Service Awards
      • Fellow of ASM International
      • Presidential Volunteer Service Awards (2015, 2016)
      • Charles J. Cleary Scientific Achievement Award (2011)
      • Materials and Manufacturing Directorate Program Management Award (2010)
      PUBLICATIONS
      Dr. Tiley has authored over 80 refereed journal articles and holds multiple patents, involving processing, microstructure evolution, and properties of aerospace alloys. In addition, Dr. Tiley has authored over 100 presentations for international workshops and conferences and organized dozens of international symposia, conferences and technical workshops.
      OTHER ACHIEVEMENTS
      • Air War College Graduate (2008)
      • Adjunct Professor for Wright State University
      • Adjunct Professor for The University of Dayton
      PROFESSIONAL MEMBERSHIPS AND ASSOCIATIONS
      • Fellow of ASM International
      • Previous Chair of the Editorial Committee for Advanced Materials and Processes
      • Member of the Editorial Committee for Advanced Materials and Processes
      • Member of the Awards Committee for ASM
      • Member of the Volunteers Committee for ASM
      PROFESSIONAL CERTIFICATIONS
      • Licensed Professional Engineer (PE)
      Abstract
      The aerospace design environment is rapidly changing to address needs for limited service life applications and unmanned vehicles. Previously, materials development efforts in the military area required significant financial resources and lengthy test and certification requirements. The costs for his work was typically offset by investments in weapon system procurements, and the potential to transition technologies to commercial systems. Given current fiscal constraints and the pace of capability improvements, this approach is no longer viable. Fortunately, advanced manufacturing practices provide processes for rapidly producing components from non-traditional materials with complex geometries. High entropy alloys have shown exciting potential for providing increased temperature and/or reduced density solutions to these problems. In addition, twin induced plasticity, multi-phase precipitates, strain hardening, and other microstructure driven mechanisms offer new tools for tailoring specific properties. However, sifting through the vast number of possible material combinations requires development and use of thermodynamic and kinetic evolution models. The application of machine learning tools is envisioned to greatly accelerate the development and coupling of these models. This presentation discusses the impact of application requirements on design criteria associated with the development of potential high entropy alloy solutions.
      Close
    • Prof. Jean-Philippe Couzinié
    • Paris-East University, France
    • "Development and Exploration of Refractory High Entropy Alloys - A Review"
    • Biography and Abstract
      Biography
      EDUCATION
      Paris-East University, FR A.R.D.* Materials Science 2017
      University of Orsay, FR Ph.D. Metallurgy and Materials 2004
      University of Orsay, FR M.D. Metallurgy and Materials 2001
      Paris 13 University, FR E.D. Materials Science 2000
      *Accreditation to supervise research (French Diploma)
      PROFESSIONAL ACTIVITIES
      • Associate Professor, Paris-East University, CNRS, Paris-East Institute of Chemistry and Materials Science (ICMPE, CNRS/UPEC), France, since 2006
      • Temporary Lecturer and Research Assistant, Paris-East University, CNRS, Paris-East Institute of Chemistry and Materials Science (ICMPE, CNRS/UPEC), France, 2000-2006
      • Ph.D. Student, Center for Research in Metallurgical Chemistry (CECM, CNRS), Study of the interactions between dislocations and grain boundaries in copper (CEA-CNRS), France, 2001-2004
      MAIN SCIENTIFIC PUBLICATIONS
      • J.P. Couzinié and G. Dirras,"Body-centered cubic high-entropy alloys: From processing to underlying deformation mechanisms", Materials Characterization, 2018, in press
      • O.N. Senkov D.B. Miracle, K.J. Chaput, J.P. Couzinié, "Development and Exploration of Refractory High Entropy Alloys – A Review", Journal of Materials Research, 33, 2018, 1-37
      • L. Lilensten, J.P. Couzinié, L. Perrière, A. Hocini, C. Keller, G. Dirras, I. Guillot, "Study of a bcc multi-principal element alloy : Tensile and simple shear properties and underlying deformation mechanisms", Acta Materialia, 142, 2018, 131-141
      • B. Barkia, J.P. Couzinié, S. Lartigue-Korinek, I. Guillot, V. Doquet, "In situ TEM observations of dislocation dynamics in titanium : Effect of the oxygen content", Materials Science and Engineering : A, 703, 2017, 331-339
      • L. Lilensten, J.P. Couzinié, J. Bourgon, L. Perrière, G. Dirras, F. Prima, I. Guillot "Design and tensile properties of a bcc Ti-rich high-entropy alloy with transformation induced plasticity", Materials Research Letters, 5(2), 2017, 110-116
      • J.P. Couzinié, L. Lilensten, Y. Champion, G. Dirras, L. Perrière, I. Guillot, "On the room temperature deformation mechanisms of a TiZrHfNbTa refractory high-entropy alloy", Materials Science and Engineering : A, 645, 2015, 255-263
      • A. Rebhi, T. Makhlouf, N. Njah, Y. Champion, J.P. Couzinié, "Characterization of aluminum processed by equal channel angular extrusion: Effect of processing route", Materials Characteriszation, 60 (12), 2009, 1489-1495
      • O. Hardouin-Duparc, J.P. Couzinié, J. Thibault-Pénisson, S. Lartgiue-Korinek, B. Décamps, L. Priester, "Atomic structures of symmetrical and asymmetrical facets in a near Sigma=9{221} tilt grain boundary in copper", Acta Materialia, 55 (5), 2007, 1791-1800
      • J.P. Couzinié, B. Décamps, L. Priester, "Interaction between dissociated lattice dislocations with a Sigma=3 grain boundary in copper", International Journal of Plasticity, 21 (4), 2015, 759-775
      RESEARCH INTERESTS
      My research interests are focused on the relationships between elementary deformation/hardening mechanisms and macroscopical behavior of metallic materials : from pure metals to complex multi-component alloys.
      Keywords:
      • Structural and physical metallurgy of conventional metals and alloys (Ti, Al...). Special focus on high entropy and compositionally complex alloys (HEAs and CCAs)
      • Alloying design, alloy preparation by conventional and unconventional methods (arc melting, induction casting, melt spinning)
      • Deformation behavior and dislocation plasticity ; Transmission electron microscopy
      Close
    • Prof. Uwe Glatzel
    • University Bayreuth, Germany
    • "German Priority Programme "Compositionally Complex Alloys - High Entropy Alloys (CCA - HEA)""
    • Biography and Abstract
      Biography
      GENERAL INFORMATION
      16. Dec. 1960 Born in Heidenheim, Germany. Married, three children.
      POSITIONS HELD, SCIENTIFIC BACKGROUND
      10/17 - present Head of Department of Metals, Neue Materialien Bayreuth GmbH
      09/16 - 09/20 Coordination of a Priority Programme, funded by the German Research Foundation (~ 25 PhD students), entitled "Compositionally Complex Alloys – High Entropy Alloys (CCA – HEA)".
      01/16 - 12/17 member of the "Apparateausschuss der DFG", appointed by the senate of the DFG
      10/15 - 09/17 Vice-Dean of the Engineering Department, University Bayreuth.
      10/13 - 09/15 Dean of the Engineering Department, University Bayreuth.
      12/12 - 10/16 Member of the Program Committee of the conference "Superalloys 2016"
      07/07 - present Shareholder of "Neue Materialien Bayreuth GmbH".
      12/06 - present Chair of the Bayreuth Materials Center, University Bayreuth.
      04/06 - 03/16 Chair of the Research Training Group 1229 "Stable and metastable multiphase systems at elevated temperatures". Funding of 14 Ph.D. by the German Research Foundation.
      04/03 - present Chair for "Metals and Alloys" at the University of Bayreuth, Germany.
      10/96 - 03/03 Full Professor for "Metals and Alloys" at the Friedrich-Schiller-University in Jena, Germany.
      07/94 - 10/96 "Privatdozent" in the Department of Materials Science and Engineering at the Technical University Berlin.
      06/92 - 06/94 "Habilitation" in "Metal Physics and Microstructural Analysis" at the Technical University Berlin.
      06/92 - 05/92 Feodor-Lynen fellowship of the Alexander von Humboldt-Foundation for a research year at the Stanford University, Stanford CA, USA.
      01/91 - 05/91 Post-doctor in Materials Science at the Technical University Berlin.
      11/87 - 12/90 Ph.D. in Materials Science at the Technical University Berlin, summa cum laude (with distinction).
      10/81 - 06/87 Physic Diploma at the University of Tübingen, Germany, grade A.
      09/84 - 08/85 Exchange student at the Oregon State University, Corvallis OR, USA, GPA 3.80.
      10/81 - 08/84 Physic studies at the University of Tübingen.
      10/80 - 09/81 Military- and civil service.
      08/71 - 06/80 Max-Planck-Gymnasium, Heidenheim, average grade of 2.1 (grade range 6.0 up to 1.0 (best)). Award in Physics.
      EXPERIENCE
      03/07 - present • Research on compositionally complex alloys and high temperature alloys: microstructure, mechanical properties, oxidation resistance. Examine possible applications, especially in a medium temperature regime (600°C - 800°C).
      • Development and analysis of high temperature alloys (nickel, platinum and other base alloys).
      • Microstructural analysis (FIB-SEM, TEM, EDX, GD-OES, X-ray and neutron diffraction and others).
      • Mechanical testing (tension, compression, fatigue, creep in most cases at ambient and high temperatures).
      • Modeling of internal stresses and development of material models for creep based on evolution of dislocation densities.
      • Tribological testing of different materials used in artificial joints.
      • Laser metallurgy (welding, brazing, hardening).

      10/96 - 03/07 • Determination of the orientation dependence of creep behavior of single crystals, four different alloys.
      • Development of a material model describing single crystalline creep behavior based on dislocation densities on individual slip systems.
      • Microstructural investigations on a new developed superalloy with low density.
      • Determination of internal stresses caused by germanium quantum dots on a SiC substrate by convergent beam electron diffraction.
      • Influence of manufacturing methods on the microstructure of titanium based low weight alloys.

      06/93 - 10/96 • Experimental determination of the orientation dependence of creep behavior.
      • Calculations of the development of internal strains during high temperature creep deformation of the single crystal nickel base superalloy CMSX-4.
      • Chemical composition measurements of the two phases by two methods: energy dispersive X-ray detector attached to a transmission electron microscope with a spatial resolution of 13 nm and atom probe field ion microscopy with a resolution in the atomic layer range.
      • Internal strains have been measured by neutron diffraction techniques with a strain resolution of 3⋅10-4 for peak portions of 10% and less of the overall intensity. An analysis procedure by convoluting the mosaic spreading of the sample and the incident beam wavelength spreading was developed.
      • The orientation dependence of creep response can be explained by different number of active slip systems, different distribution of internal stresses in the matrix plates, a selection mechanism for differently stressed matrix plates and morphology changes.

      06/92 - 05/93 • Research on creep deformation mechanisms and orientation dependence of the intermetallic, B2 ordered alloy NiAl.
      • Differences in creep behavior of differently oriented single crystals can be explained by a mobility controlled initial creep rate and a structural controlled hardening mechanism.
      • Application of the anisotropic elastic theory in order to calculate dislocation line energies, line tensions and the movement of dislocation nodes. Host professor: Prof. Dr. W.D. Nix, Stanford University.
      • Determination of dislocation configurations and morphology changes of a two phase nickel base superalloy after high temperature low cycle fatigue.
      • Calculations of internal stresses, arising from the misfit between the two phases, carried out by finite element modeling of the microstructure.
      • The decrease in stress with increasing cycle numbers could be explained by two mechanisms. A fast relaxation of the misfit occurs by incorporation of dislocations with an edge component in the interfaces leading to a fast softening at the onset of testing. A slower softening at higher cycle numbers can be explained by climb of these dislocations in perfect edge orientation and morphology changes. Advisor: Prof. Dr. M. Feller-Kniepmeier, TU-Berlin.

      08/86 - 06/87 • Master thesis on "Optimization of Electron Optical Systems". Advisor: Prof. Dr. F. Lenz, Applied Physics, Universität Tübingen.
      ADDITIONAL INFORMATION
      Teaching: • Metallic Materials I: Structure and Properties of Metals and Alloys
      • Metallic Materials II: Deformation Mechanisms in Metals and Alloys.
      • Advanced High Temperature Alloys.
      • Semi-Finished Metallic Products.
      • Joining Techniques and Laser Treatment of Alloys.
      • Heat Treatment of Alloys.

      Activities and Memberships: • The Minerals, Metals & Materials Society (TMS), USA.
      • Deutsche Gesellschaft für Materialkunde (DGM), chairing the training seminar "Superlegierungen - Kriechen und Oxidation".
      • Deutsche Physikalische Gesellschaft (DPG), Germany.

      Prices and Awards: • Lee Hsun Lecture Award 2017, Institute of Metal Research, Chinese Academy of Sciences (2018).
      • Heisenberg Fellowship of Deutsche Forschungsgemeinschaft (1995 - 1996).
      • Gerhard-Hess award of the DFG (400.00 € for 3 years), 1994-1997.
      • Feodor-Lynen Fellowship of the Alexander von Humboldt Foundation (1991 - 1992).
      Close
    • Prof. Zhaoping Lu
    • University of Science and Technology Beijing, China
    • "Strengthening of high-entropy alloys"
    • Biography and Abstract
      Biography
      EDUCATION
      National University of Singapore, Singapore Ph. D Materials Science 2001
      Huazhong University of Science and Technology, P. R. China M. E. Materials Science and Engineering 1995
      Huazhong University of Science and Technology, P. R. China B. E. Materials Science and Engineering 1992
      PROFESSIONAL ACTIVITIES
      • Editor, Intermetallics, 2010-
      • Advisory Board Member, Advanced Engineering Materials, 2014-
      • Editorial board Member, Journal of Science and Technology, 2014-
      • Editorial board Member, Materials Letters, 2011-
      • Editorial Board Member, Advances in Manufacturing, 2012-
      • Editorial Board Member, Journal of Materials Science & Technology
      • National Council Chairman, Committee of the Youth Branch, Chinese Materials Research Society, 2012-
      • Co-organizer, Symposium D03: Metallic Glasses and High-entropy Alloys, Yinchuan, Jul. 9-12, 2017.
      • Vice Chair, Gordon conference: Structural Nanomaterials, Hong Kong, Jul. 10-16, 2016.
      • Co-organizer, International Workshop on Advanced Materials: In honor of CT Liu’ life-time Contributions to the Material Advancement, Yangzhou, Mar. 27-31, 2016.
      • Organizer, Seminar of High Entropy Alloys(supported by National Natural Science Foundation of China), Beijng, Jan. 22-24, 2016.
      • Organizer, Symposium V3: Bulk Metallic Glasses and High Entropy Alloys, The 14th International Union of Materials Research Societies-International Conference on Advanced Materials (IUMRS-ICAM), Jeju, Korea, Oct. 25-29, 2015.
      • Organizer, The 1st International Workshop on Microstructures and Mechanical Behavior of High-entropy Alloys, Guiyang, China, Dec. 15-17, 2014.
      • Organizer, Symposium D5: Bulk Metallic Glasses and High Entropy Alloys, IUMRS- ICAM 2013 International Conference on Advanced Materials, Qingdao, China, Sept. 22-28, 2013.
      AWARD AND HONORS
      • China 10 Major Scientific Progress, Ministry of Science and Technology, China, 2018
      • First Prize for Natural Sciences, Ministry of Education, China, 2017
      • Leading Talent of Ten Thousand Talent Program, Ministry of Education, China, 2017
      • Young and Middle-aged Leading Talent of Innovative Talents Promotion Project, Ministry of Science and Technology, China, 2014
      • Second Prize for Natural Sciences, Ministry of Education, China, 2010
      • R&D 100 Award, R&D Magazine, USA, 2009
      • Government Special Allowance, Chinese State Council, 2009
      • Distinguished Young Scientist Award, National Natural Science Foundation of China, 2008
      • Changjiang Scholar, Ministry of Education, China,2007
      MAIN SCIENTIFIC PUBLICATION
      • R. Li, X. J. Liu, H. Wang, Y. Wu, Z. P. Lu*. High-performance hybrid electrode decorated by well-aligned nanograss arrays for glucose sensing. Biosensors and Bioelectronics, 102, 288-295, 2018.
      • Z. F. Lei, X. J. Liu, R. Li, H. Wang, Y. Wu, Z. P. Lu*. Ultrastable metal oxide nanotube arrays achieved by entropy-stabilization engineering. Scripta Materialia, 146, 340-343, 2018.
      • H. L. Huang, Y. Wu, J. Y. He, H. Wang, X. J. Liu, W. Wu, Z. P. Lu*. Phase-transformation ductilization of brittle high-entropy alloys via metastability engineering. Advanced Materialia, 29, 1701678, 2017.
      • F. Zhang, Y. Wu, H. B. Lou, Z. D. Zeng, V. B. Prakapenka, E. Greenberg, Y. Ren, J. Y. Yan, J. S. Okasinski, X. J. Liu, Y. Liu, Q. S. Zeng, Z. P. Lu*. Polymorphism in a high-entropy alloy, Nature Communications, 8, 15687, 2017.
      • S. H. Jiang, H. Wang, Y. Wu, X. J. Liu, H. H. Chen, M. J. Yao, B. Gault, D. Ponge, D. Raabe, A. Hirata, M. W. Chen, Y. D. Wang, Z. P. Lu*. Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation, Nature, 544, 460, 2017.
      • Y. Yuan, Y. Wu, X. Tong, H. Zhang, H. Wang, X. J. Liu, L. Ma, H. L. Suo, Z. P. Lu*. Rare-earth high-entropy alloys with giant magnetocaloric effect, Acta Materialia, 125, 481-489, 2017.
      • J. Y. He, H. Wang, H.L. Huang, X.D. Xu, M.W. Chen, Y. Wu, X.J. Liu, T.G. Nieh, K. An, Z. P. Lu*. A precipitation-hardened high-entropy alloy with outstanding tensile properties, Acta Materialia, 102, 187-196, 2016.
      • J. Y. He, W. H. Liu, H Wang, Y. Wu, X. J. Liu, T. G. Nieh, and Z. P. Lu*. Effects of Al addition on structural evolution and tensile properties of the FeCoNiCrMn high-entropy alloy system, Acta Materialia, 62, 105-113, 2014.
      • W. H. Liu, Y. Wu, J. Y. He, T. G. Nieh, Z. P. Lu*. Grain growth and the Hall-Petch relationship in a high-entropy FeCrNiCoMn alloy, Scripta Materialia, 68, 526-529, 2013.
      RESEARCH INTERESTS
      • High-entropy alloys
      • High-performance steels
      • Bulk metallic glass
      • Porous and nanoporous metals
      Close
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Host Organization: The Korean Institute of Metals and Materials (KIM)
Name of representative: Hong KyungTae
Address: KIM Bldg. 6th Fl., 38, Seocho-daero 56-gil, Seocho-gu, Seoul
Registration: No. 120-82-04081
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