Abstract Scope |
Short-range order (SRO) has been proposed in modern alloys including high entropy alloys (HEAs), arising from various origins such as magnetic frustrations, strong electronic interactions, or the formation of complexes with interstitial elements. However, beneficial utilization of SROs in the design of new alloys has been difficult, due to the lack of understanding about SRO-dislocation interactions. The classical understanding of SRO, i.e., detrimental planar slip induced by SROs, does not do full justice to the complexity of this problem, as can be seen in recently developed HEAs with unexpected improvements in mechanical properties while having planar slip mechanisms. In efforts to find simple guiding principles for customizing beneficial SROs, we here present a classification of SROs in various face-centered cubic alloys based on their composition-dependent effects on dislocations explored through stress-relaxation tests, in-situ deformation studies, and direct observations via revSTEM techniques. |