|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||J-106: Mechanical Properties and Discrete Slip Events in Conventional Alloys and High-entropy Alloys at Different Temperatures
||Chun-Yi Chen, Chi-Huan Tung, Shou-Yi Chang
|On-Site Speaker (Planned)
High-entropy alloys are being considered as prospective materials owing to their exceptional mechanical properties. Over the past few years, many investigations were conducted to find out the underlying mechanisms for their unique deformation behavior. In our previous study of in-situ micropillar compression, uniform gum-like deformation with abundant nucleation sites and short-range activities of defects was observed in several crystalline high-entropy systems, very different from the long-range dislocation gliding in conventional alloys. Herein, we further investigated the mechanical properties and deformation behavior of conventional face-centered cubic alloys and high-entropy alloys from cryogenic to high temperatures by using nanoindentation and in-situ micropillar compression in SEM. Experimental results indicated that the deformation anisotropy in the alloys might change with temperatures. The discrete slip events determined by the numerical analysis of ultraprecise displacement data revealed power-law scaling between the number of events and their magnitude, i.e. a scale-free behavior.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume