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题名: Transition of twinning behavior in CoCrFeMnNi high entropy alloy with grain refinement
作者: Sun, SJ;  Tian, YZ;  Lin, HR;  Yang, HJ;  Dong, XG;  Wang, YH;  Zhang, ZF
发表日期: 2018-1-18
摘要: Fully recrystallized CoCrFeMnNi high entropy alloys (HEAs) with different grain sizes ranging from 503 nm to 88.9 mu m were fabricated by cold rolling and controlled annealing. Tensile tests were conducted at ambient temperature, and deformation microstructures were investigated using electron channeling contrast imaging (ECCI) and transmission electron microscopy (TEM) techniques. It is found that strain-hardening curves changed dramatically with grain refinement. Deformation twinning prevails when the grain size is coarse, but it is absent when the grain size falls in the ultrafine-grained (UFG) regime. The transition of twinning behavior is supposed to be determined by the increased twinning stress with grain refinement. It is indicated that the twinning behavior of the HEAs is strongly dependent on the competition between the flow stress and critical twinning stress with grain refinement.
刊名: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Sun, SJ,Tian, YZ,Lin, HR,et al. Transition Of Twinning Behavior In Cocrfemnni High Entropy Alloy With Grain Refinement[J]. Materials Science And Engineering A-structural Materials Properties Microstructure And Processing,2018,712:603-607.

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