报告题目：Characterization of Serrated Flows in Bulk Metallic Glasses and High Entropy Alloys

报告时间：2015年7月8日下午15：30

报告地点：数学馆 3楼会议室（310）

报告人： 田纳西大学 P. K. Liaw教授

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.

专家简介：

Professor Liaw joins 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.

He has been the Director of the National Science Foundation (NSF) Integrative Graduate Education and Research Training (IGERT) Program, the Director of the NSF International Materials Institutes (IMI) Program, and the Director of the NSF Major Research Instrumentation (MRI) Program at UT.