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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
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume712Pages:603-607
AbstractFully 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.
description.department[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
KeywordStacking-fault Energy Induced Plasticity Steels Deformation Mechanisms Tensile Properties Size Ductility Strength Microstructure Stress Metals
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [51331007, 51501196, 51501198]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79577
Collection中国科学院金属研究所
Corresponding AuthorTian, YZ; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
Recommended Citation
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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