|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Short-range Order and Planar-Slip Assisted Deformation Twinning in a CrCoNi Medium-Entropy Alloy (MEA)
||Ruopeng Zhang, Qin Yu, Jun Ding, Robert Ritchie, Mark Asta, Andrew M. Minor
|On-Site Speaker (Planned)
The emerging concept of multiple-principle element alloys received tremendous interest in the last decade due to the unprecedented mechanical properties. The CrCoNi single-phase alloy exhibits exceptional tensile ductility and fracture toughness thanks to its elongated work hardening. Traditionally, the CrCoNi MEA is treated as a random solid solution. Nevertheless, recent theoretical and experimental studies suggested the tendency of forming chemical short-range order. Such formation has been experimental observed in our previous study. The formation of SRO increases the stacking fault energy and induces a wavy-to-planar slip transition. In binary alloy systems, the formation of SRO usually leads to deformation localization and jeopardized ductility due to the glide plane softening effect and deformation localization. However, in the CrCoNi MEA, the ductility remains unaffected with the SRO and planar slip. Our current study aims to reveal the relation between SRO and the propensity of nanotwinning in the alloy.
||Characterization, High-Entropy Alloys, Mechanical Properties