Local chemical order enables an ultrastrong and ductile high-entropy alloy in a cryogenic environment.

ABSTRACT: Owing to superior strength-ductility combination and great potential for applications in extreme conditions, high-entropy alloys (HEAs) with the face-centered cubic (FCC) structure have drawn enormous attention. However, the FCC structure limits yield strength and makes the alloys unable to meet ever-increasing demands for exploring the universe. Here, we report a strategy to obtain FCC materials with outstanding mechanical properties in both ambient and cryogenic environments, via exploiting dynamic development of the interstitial-driven local chemical order (LCO). Dense laths composed of the multiscaled LCO domains evolve from planar-slip bands that form in the prior thermomechanical processing, contributing to ultrahigh yield strengths over a wide temperature range. During cryogenic ten

SUBMITTER: Sun L 

PROVIDER: S-EPMC11606435 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature