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- Title
Diffusion in ultra-fine-grained CoCrFeNiMn high entropy alloy processed by equal-channel angular pressing.
- Authors
Jiang, Yao; Liu, Yuwei; Zhou, Hongbo; Taheriniya, Shabnam; Bian, Baixue; Rogal, Lukasz; Wang, Jing Tao; Divinski, Sergiy; Wilde, Gerhard
- Abstract
Grain boundary diffusion in severely plastically deformed (SPD) CoCrFeMnNi high entropy alloy (HEA) has been studied by applying the tracer diffusion technique. After two passes of equal channel angular pressing (ECAP), three untra-fast diffusion paths in ECAP-processed CoCrFeMnNi HEA were distinguished, which were identified with twin boundaries, high-angle grain boundaries and porosity defects. The enhanced diffusivity is induced by a high strain localization in the vicinity of interfaces in a deformation-induced non-equilibrium state that is correlated with the pronounced deformation twinning due to the low stacking fault energy of the material.
- Subjects
KIRKENDALL effect; TWIN boundaries; CRYSTAL grain boundaries; MAGNETIC entropy
- Publication
Journal of Materials Science, 2024, Vol 59, Issue 14, p5805
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-024-09463-1