|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Mechanical properties and deformation behavior of a refractory multiprincipal element alloy under cyclic loading
||Jia Li, Jing Peng, Baobin Xie, Li Li, Yang Chen, Yuanyuan Tian, Fusheng Tan, Qihong Fang, Peter K. Liaw
|On-Site Speaker (Planned)
The refractory multiprincipal element alloys (RMPEAs) exhibit considerably high strengths at temperatures above 1,600°C, which can be a significant potential required in the high demand for aerospace applications. However, the atomic-scale work-hardening behavior of such important materials during low-cycle loading remains unknown. Here, we use atomic simulations combined with machine learning to study the low-cycle fatigue of nanocrystalline RMPEAs with different grain sizes, and obtain a large amount of data efficiently and accurately to reveal the cyclic deformation, work hardening, and damage mechanisms affected by grain size. An extensive grain growth is observed during the cyclic deformation, thus driving the dynamic Hall-Petch strengthening mechanism. Moreover, the present study reveals various cyclic deformation micro-mechanisms with different grain sizes, which can provide guidance for predicting the optimal grain size to achieve the best performance of low-cycle loading, and accelerating the development of superior fatigue-resistant RMPEAs.
||High-Entropy Alloys, Modeling and Simulation, Mechanical Properties