|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||In Situ TEM Characterizations on the Dual Phase High Entropy Alloy
||Sijing Chen, Qian Yu
|On-Site Speaker (Planned)
The emerge of high performance dual phase high entropy alloys provides new aspect for alloy design, while the deformation mechanisms that underlie their mechanical properties are still to be discovered. We performed in-situ tensile tests on a typical FCC/HCP dual phase high entropy alloy in a transmission electron microscope (TEM) to investigate its deformation behaviors in real time. Massive stacking fault activities were observed to accommodate the plastic strain at the early stage of the deformation. Their reactions also formed three-dimensional stacking fault networks that took dynamic control over strength and ductility. As the stress went higher, phase transition events that base on the stacking fault networks took place. Our in situ TEM compression tests quantitatively reveal the strengthening effect raised by phase transformation from FCC to HCP through growth of existing HCP phase. The easy phase transformation upon the stacking fault networks is mainly due to local chemical variations.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume