报告题目(中文)：高熵合金（多组元合金）研究中的挑战性问题

报告题目(英文)：Some of the challenges in the stud y of high-entropy alloys (or multi-principal-elements alloys)

报告内容简介：In this presentation, I will first review briefly the history of the development of high entropy alloys. I will, then, discuss questions associated with each of the “four core effects” – high entropy, sluggish diffusion, lattice distortion, and cocktail effect, initially proposed by Professor Yeh. Are these effects physically real or do they have experiments to support? I will raise several difficult and challenging questions the community is now facing, including even the definition of high entropy alloys. Even there is no clear answer for some of these questions, it is a great opportunity for scientists to make significant contributions to this field.

报告人姓名：Professor Tai-gang Nieh

报告人简介(中文)：The University of Tennessee Department of Materials Science & Engineering EDUCATION: Ph.D., Materials Science and Engineering, Stanford University, 1980. M.S., Physics, University of Washington, Seattle, Washington, 1976. B.S., Physics, National Cheng–Kung University, Taiwan, 1973. PROFESSIONAL BACKGROUND Dept of Materials Science and Engineering, University of Tennessee — Aug 2004 to present. – Professor Lawrence Livermore National Laboratory — Aug, 1992 to Jul 2004 – Principal Investigator of R&D projects: "Superplasticity in Fine-Structured Materials", funded by Department of Energy–Office Basic Energy Science, 1993-2003. "Development and Implementation of Advanced Intermetallic Alloys and Composites for Aircraft Engine Applications", funded by DOE–Technology Transfer Office, 1993-1996 "High Strain Rate Superplasticity", funded by U.S. Army Research Office, 1992-1995 "Superplastic Roll Forming Technology for Automobile Wheel Applications", funded by DOE/USIC, 1994-1996 “Enhancement of Strength and Ductility in Bulk Nanocrystalline Metals”, "Synthesis and Processing of Nanocrystalline Hydroxyapatite for Biomedical Applications", “Atomic Structure and Deformation Behavior in Bulk Amorphous Alloys”, “Cellular Solids”, and "Development of Superplastic Al-Cu Alloys for Automotive Applications", all funded by LLNL Laboratory-Directed Research and Development Program, 1993 to 2004 Co–PI of programs: "Light–Weight Metal–Matrix Composites" and "Laminated Metal Composites as Containment Materials", funded by DOE–Technology Transfer Office PI of programs: “Bulk metallic glasses”, funded by Department of Energy–Office Basic Energy Science _2005-2009 PI of programs: “Understand and Design Amorphous-Crystalline Nanolaminates”, funded by NSF_2009-2014 PI of programs: “High-Entropy Alloys Strengthened by Coherent Nanoprecipitates”, funded by NSF_2014-2019 Lockheed Missiles and Space Co., Inc. – Group Leader of the Metallurgy Department, Jan 1986 to Aug 1992. – Senior Member of the Research Laboratories, inducted in January 1989. – Principal Investigator of the Independent Research project "Innovative Materials Development" which includes five tasks: (1). Superplastic Ceramics, (2). Microlaminates and High Strain Rate Deformation, (3). Nanocrystals, (4). Metal-Matrix Composites, and (5) Refractory Metal Alloys. – Principal Investigator of government contracts: 2 "Development of Fine–Grained, Ductile Tungsten Alloys for Armor/Anti–Armor Applications" and "Superplasticity in Fine–Grained Ceramic Composites", both funded by Army Research Office, 1988-1991 "Rapid Solidification of Al–Be–Li Ternary Alloys", funded by Office of Naval Research, 1986-1988 "Microlaminates", funded by the Naval Air Development Center, 1989-1992 "Refractory Metal Beryllides for Aerospace Applications", funded by Air Force Office of Scientific Research, 1989-1992 "Development of Advanced Metallics for Structural Aerospace Applications", funded by DARPA/Office of Naval Research, 1988-1991 – Senior Staff Scientist, Jan 1989 to 1992 – Staff Scientist, February 1986 – Dec 1982 to Feb 1986 – Scientist – Research Associate, Jul 1980 to Jul 1982.

报告人简介(英文)：

报告人单位(中文)：田纳西大学

报告人单位(英文)：The University of Tennessee

报告时间：2019-05-08 10:00

报告地点：宝山校区东区材料基因工程研究院510会议室

主办单位：7003全讯白菜网

联系人：王刚

联系方式：021－66135269