Deformation and failure of the CrCoNi medium-entropy alloy subjected to extreme shock loading.

ABSTRACT: The extraordinary work hardening ability and fracture toughness of the face-centered cubic (fcc) high-entropy alloys render them ideal candidates for many structural applications. Here, the deformation and failure mechanisms of an equiatomic CrCoNi medium-entropyalloy (MEA) were investigated by powerful laser-driven shock experiments. Multiscale characterization demonstrates that profuse planar defects including stacking faults, nanotwins, and hexagonal nanolamella were generated during shock compression, forming a three-dimensional network. During shock release, the MEA fractured by strong tensile deformation and numerous voids was observed in the vicinity of the fracture plane. High defect populations, nanorecrystallization, and amorphization were found adjacent to these areas of localiz

SUBMITTER: Zhao S 

PROVIDER: S-EPMC10162673 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature