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Transition of twinning behavior in CoCrFeMnNi high entropy alloy with grain refinement
Sun, SJ; Tian, YZ; Lin, HR; Yang, HJ; Dong, XG; Wang, YH; Zhang, ZF; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
2018-01-18
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
卷号712页码:603-607
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.; 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.
部门归属[sun, s. j. ; tian, y. z. ; lin, h. r. ; yang, h. j. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [sun, s. j. ; lin, h. r. ; zhang, z. f.] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [dong, x. g.] shenyang ligong univ, sch mat sci & engn, shenyang 110159, peoples r china ; [wang, y. h.] yanshan univ, natl engn res ctr equipment & technol cold strip, qinhuangdao 066004, peoples r china
关键词Stacking-fault Energy Induced Plasticity Steels Deformation Mechanisms Tensile Properties Size Ductility Strength Microstructure Stress Metals
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National Natural Science Foundation of China (NSFC) [51331007, 51501196, 51501198]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79577
专题中国科学院金属研究所
通讯作者Tian, YZ; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
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.
APA Sun, SJ.,Tian, YZ.,Lin, HR.,Yang, HJ.,Dong, XG.,...&Zhang, ZF .(2018).Transition of twinning behavior in CoCrFeMnNi high entropy alloy with grain refinement.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,712,603-607.
MLA Sun, SJ,et al."Transition of twinning behavior in CoCrFeMnNi high entropy alloy with grain refinement".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 712(2018):603-607.
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