|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
||Seeing the Shearing of Short-range Order with Dislocations in the High-entropy Alloy
||Jae-Bok Seol, Jongun Moon, Hyo Ju Bae, Jae Wung Bae, Hyokyung Sung, Jung Gi Kim, Hyoung Seop Kim
|On-Site Speaker (Planned)
Recent studies have dedicated to short-range order (SRO) visualization and its impact on complex concentrated solutions, through the combined electron-beam diffraction and atomic imaging of transmission electron microscopy. However, a key challenge has still remained as to how varying the uniaxial strain rates has a profound effect on the SRO degree, mechanical and thermal properties of high-entropy alloys (HEAs), particularly under near-constant stacking-fault energy conditions. Herein we found that, employing higher tensile strain rate under quasi-static conditions at 77 K, results in higher degree of SRO in an interstitially hardened Fe40Mn40Cr10Co10 (at%) alloy. This corresponds to the increased density of SRO domains, i.e., higher degree of SRO implies the higher amounts of SRO rather than SRO sizes. Additionally, we showed the shearing of such domains with successive dislocations inside the early formed planar slip band during the tensile tests.
||High-Entropy Alloys, Characterization,