中国物理B ›› 2021, Vol. 30 ›› Issue (5): 57103-057103.doi: 10.1088/1674-1056/abdda5
所属专题： SPECIAL TOPIC — Machine learning in condensed matter physics
Quantitative structure-plasticity relationship in metallic glass: A machine learning study
Yicheng Wu(吴义成)1, Bin Xu(徐斌)1, Yitao Sun(孙奕韬)2, and Pengfei Guan(管鹏飞)1,†
- 1 Beijing Computational Science Research Center, Beijing 100193, China;
2 Institutes of Physics, Chinese Academy of Sciences, Beijing 100190, China
Quantitative structure-plasticity relationship in metallic glass: A machine learning study
Yicheng Wu(吴义成)1, Bin Xu(徐斌)1, Yitao Sun(孙奕韬)2, and Pengfei Guan(管鹏飞)1,†
- 1 Beijing Computational Science Research Center, Beijing 100193, China;
2 Institutes of Physics, Chinese Academy of Sciences, Beijing 100190, China
摘要： The lack of the long-range order in the atomic structure challenges the identification of the structural defects, akin to dislocations in crystals, which are responsible for predicting plastic events and mechanical failure in metallic glasses (MGs). Although vast structural indicators have been proposed to identify the structural defects, quantitatively gauging the correlations between these proposed indicators based on the undeformed configuration and the plasticity of MGs upon external loads is still lacking. Here, we systematically analyze the ability of these indicators to predict plastic events in a representative MG model using machine learning method. Moreover, we evaluate the influences of coarse graining method and medium-range order on the predictive power. We demonstrate that indicators relevant to the low-frequency vibrational modes reveal the intrinsic structural characteristics of plastic rearrangements. Our work makes an important step towards quantitative assessments of given indicators, and thereby an effective identification of the structural defects in MGs.
中图分类号: (Amorphous semiconductors, metallic glasses, glasses)
- 71.23.Cq