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Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy
Wang, Hao1; Chen, Dengke2; An, Xianghai1; Zhang, Yin2; Sun, Shijie3; Tian, Yanzhong4,5; Zhang, Zhefeng3; Wang, Anguo1; Liu, Jinqiao1; Song, Min6; Ringer, Simon P.1; Zhu, Ting2; Liao, Xiaozhou1
Corresponding AuthorAn, Xianghai(xianghai.an@sydney.edu.au) ; Zhu, Ting(ting.zhu@me.gatech.edu) ; Liao, Xiaozhou(xiaozhou.liao@sydney.edu.au)
2021-03-01
Source PublicationSCIENCE ADVANCES
ISSN2375-2548
Volume7Issue:14Pages:9
AbstractThe Cantor high-entropy alloy (HEA) of CrMnFeCoNi is a solid solution with a face-centered cubic structure. While plastic deformation in this alloy is usually dominated by dislocation slip and deformation twinning, our in situ straining transmission electron microscopy (TEM) experiments reveal a crystalline-to-amorphous phase transformation in an ultrafine-grained Cantor alloy. We find that the crack-tip structural evolution involves a sequence of formation of the crystalline, lamellar, spotted, and amorphous patterns, which represent different proportions and organizations of the crystalline and amorphous phases. Such solid-state amorphization stems from both the high lattice friction and high grain boundary resistance to dislocation glide in ultrafine-grained microstructures. The resulting increase of crack-tip dislocation densities promotes the buildup of high stresses for triggering the crystalline-to-amorphous transformation. We also observe the formation of amorphous nanobridges in the crack wake. These amorphization processes dissipate strain energies, thereby providing effective toughening mechanisms for HEAs.
Funding OrganizationAustralian Research Council ; University of Sydney under the Robinson Fellowship Scheme ; U.S. NSF ; National Natural Science Foundation of China ; Open Foundation of State Key Laboratory of Powder Metallurgy at Central South University
DOI10.1126/sciadv.abe3105
Indexed BySCI
Language英语
Funding ProjectAustralian Research Council[DP190102243] ; Australian Research Council[DE170100053] ; University of Sydney under the Robinson Fellowship Scheme ; U.S. NSF[DMR-1810720] ; National Natural Science Foundation of China[51971247] ; Open Foundation of State Key Laboratory of Powder Metallurgy at Central South University
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000636455600015
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161826
Collection中国科学院金属研究所
Corresponding AuthorAn, Xianghai; Zhu, Ting; Liao, Xiaozhou
Affiliation1.Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia
2.Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
3.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
4.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
5.Northeastern Univ, Res Ctr Met Wires, Shenyang 110819, Peoples R China
6.Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hao,Chen, Dengke,An, Xianghai,et al. Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy[J]. SCIENCE ADVANCES,2021,7(14):9.
APA Wang, Hao.,Chen, Dengke.,An, Xianghai.,Zhang, Yin.,Sun, Shijie.,...&Liao, Xiaozhou.(2021).Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy.SCIENCE ADVANCES,7(14),9.
MLA Wang, Hao,et al."Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy".SCIENCE ADVANCES 7.14(2021):9.
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