Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy

doi:10.1126/sciadv.abe3105

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	Deformation-induced crystalline-to-amorphous phase transformation in a CrMnFeCoNi high-entropy alloy
	Wang, Hao 1; Chen, Dengke 2; An, Xianghai 1; Zhang, Yin 2; Sun, Shijie 3; Tian, Yanzhong 4,5; Zhang, Zhefeng 3; Wang, Anguo 1; Liu, Jinqiao 1; Song, Min 6
刊名	SCIENCE ADVANCES
	2021-03-01
卷号	7 期号:14 页码:9
ISSN号	2375-2548
DOI	10.1126/sciadv.abe3105
通讯作者	An, Xianghai(xianghai.an@sydney.edu.au) ; Zhu, Ting(ting.zhu@me.gatech.edu) ; Liao, Xiaozhou(xiaozhou.liao@sydney.edu.au)
英文摘要	The 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.
资助项目	Australian 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研究方向	Science & Technology - Other Topics
语种	英语
出版者	AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号	WOS:000636455600015
资助机构	Australian 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/161825]
专题	金属研究所_中国科学院金属研究所
通讯作者	An, Xianghai; Zhu, Ting; Liao, Xiaozhou
作者单位	1.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
推荐引用方式 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.