报告题目：Evaluation of Calphad approach and empirical rules on the phase stability of multi-principal element alloys
主讲嘉宾：Song-Mao Liang（Institute of Metallurgy, Clausthal University of Technology, Clausthal-Zellerfeld, Germany）
活动时间：3月5日（周二）上午10:00
活动地点：师昌绪楼403会议室
报告简介：
Multi-Principal Element Alloys (MPEAs), which is also widely known as High Entropy Alloys (HEAs) or Compositionally Complex Alloys (CCAs), has become one of the hottest topics in development of new alloy systems. The main feature of the MPEAs is that near equiatomic multi-components constitute a disordered solid solution phase which exists in an alloy as a single phase or a main matrix phase, or two solution phases with close amounts as dual phase structure. Several empirical rules, mainly based on Hume-Rothery rule and the estimated thermodynamic properties, have been proposed to predict the formation of solid solution phases.Compared to these empirical rules, Calphad approach provides a more reliable and quantitative prediction. In the present work, we choose three model systems of AlxCoCrFeNi, CoCrxFeMnNi and AlxLiMgSnZn to evaluate these empirical rules by comparing with the Calphad calculated results. The Calphad calculated temperature-composition sections reveal the effect of composition on the phase formation under equilibrium condition. Corresponding diagrams along these sections illustrate parameter variations from empirical rules associated with alloy compositions and highlight predictions and limitations.
嘉宾简介：
Dr. Song-Mao Liang received his his Ph.D degree from Institute of Metal Research, Chinese Academy of Sciences in 2010. He then worked at the same institute as assistant professor. Since July 2017, he works as research associate in Clausthal University of Technology. His research interests mainly focus on Calphad modeling and Computational thermodynamics applications, such as on light weight alloys, high entropy alloys, Li-ion battery materials and oxides, etc. He has published more than 30 peer reviewed journal articles and serves as reviewer for more than 10 journals.
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