期刊
ACTA METALLURGICA SINICA-ENGLISH LETTERS
卷 35, 期 8, 页码 1275-1280出版社
CHINESE ACAD SCIENCES, INST METAL RESEARCH
DOI: 10.1007/s40195-021-01362-7
关键词
High entropy alloy; Deformation twinning; Defects; Shear stress concentration
资金
- National Natural Science Foundation of China [51872159, 51572145]
Experimental studies were conducted on deformation twins initiated in CryMnFeCoNi high entropy alloy at cryogenic temperature. It was found that under external loading, a three-dimensional shear stress concentration originating from dislocation tangling at both the grain boundaries and twin boundaries could be formed, promoting emission of partial dislocations from the planar defects and thus considered to be the key factor for twin formation. A sympathetic nucleation mechanism was proposed to describe the nucleation behaviors of twins.
The deformation twins initiated in CrMnFeCoNi high entropy alloy at cryogenic temperature are experimentally studied. Under the external loading, a three-dimensional shear stress concentration originating from dislocation tangling at both the grain boundaries and twin boundaries could be formed, which promotes emission of partial dislocations from the planar defects and is thus considered to be the key factor for twin formation. A sympathetic nucleation mechanism is proposed to describe the nucleation behaviors of twins.
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