|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Deformation-induced Crystalline to Amorphous Phase Transformation in High-entropy Alloys
||Dengke Chen, Yin Zhang, Hao Wang, Xiaozhou Liao, Ting Zhu
|On-Site Speaker (Planned)
A rational design of high-performance high-entropy alloys (HEAs) is critically hinged on a deep understanding of the underlying deformation mechanisms. Here we report the in situ TEM observation and atomistic simulation of crystalline to amorphous phase transformation at the crack tip of an ultrafine-grained Cantor alloy. Due to the rugged energy landscape, dislocations are trapped near the crack tip. Interactions between densely tangled dislocations on different slip systems result in solid-state amorphization around the crack tip. Further crack propagation is impeded by the amorphous bridges in the crack wake, contributing to the enhanced fracture toughness of the Cantor alloy.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume