报告题目：

Characterization of Serrated Flows in Bulk Metallic Glasses And High Entropy Alloys

报告人:                                  Prof. P. K. Liaw

Department of Materials Science & Engineering, The University of Tennessee, Knoxville, USA

时间：2015年7月16日(周四)  10: 00         

地点：中国科学院力学研究所主楼344会议室

报告摘要：

Bulk metallic glasses (BMGs) and high entropy alloys (HEAs) attract more and more attention for their unique mechanical properties. Recent work suggests that BMGs and HEAs show serrated flows at certain temperatures and strain rates, which is similar to the Portevin–Le Chatelier effect (PLC) in traditional alloys. Therefore, the study of serration behavior could provide a unique way to investigate the deformation dynamics of BMGs and HEAs, and, consequently, to provide us the fundamental understanding of deformation mechanisms for BMGs and HEAs. In this study, compressive behavior of BMGs and HEAs are characterized statistically, and a new model developed from the mean-field theory is utilized to describe the serrated flows in BMGs and HEAs.

报告人简介：

Peter K. Liaw was born in Chiayi, Taiwan. He obtained his B.S. in Physics from the National Tsing Hua University, Taiwan, and his Ph.D. in Materials Science and Engineering from Northwestern University, USA, in 1980. After working at the Westinghouse Research and Development (R&D) Center for thirteen years, he joins the faculty and becomes an Endowed Ivan Racheff Chair of Excellence in the Department of Materials Science and Engineering at The University of Tennessee (UT), Knoxville, since March 1993. 

He has been working in the areas of fatigue, fracture, nondestructive evaluation, and life-prediction methodologies of structural alloys and composites.  Since joining UT, his research interests include mechanical behavior, nondestructive evaluation, biomaterials, and processing of high-temperature alloys and ceramic-matrix composites and coatings with the kindest and greatest help of his colleagues at UT and the near-by Oak Ridge National Laboratory.  He has published over six hundred and fifty journal papers, edited more than sixteen books, and presented numerous invited and keynote lectures at various national and international conferences, universities, and industries.

报告联系人：沈楠  (office@lnm.imech.ac.cn 82543935)