Dual-scale chemical ordering for cryogenic properties in CoNiV-based alloys.

ABSTRACT: The mechanical properties of metallic materials often degrade under harsh cryogenic conditions, posing challenges for low-temperature infrastructures¹. Here we introduce a dual-scale atomic-ordering nanostructure, characterized by an exceptionally high number density of co-existing subnanoscale short-range ordering (approximately 2.4 × 10²⁶ m^-3) and nanoscale long-range ordering (approximately 4.5 × 10²⁵ m^-3) domains, within a metallic solid-solution matrix in a CoNiV-based alloy to improve the synergy of strength and ductility at low temperatures. We observe an ordering-induced increase in dislocation shear stress as well as a more rapid dislocation multiplication owing to the dislocation blocking effect of nanoscale long-range orderi

SUBMITTER: Lu T 

PROVIDER: S-EPMC12422977 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature