Harnessing instability for work hardening in multi-principal element alloys

doi:10.1038/s41563-024-01871-7

IMR OpenIR

	Harnessing instability for work hardening in multi-principal element alloys
	Xu, Bowen 1,2; Duan, Huichao 3; Chen, Xuefei 1,2; Wang, Jing 1; Ma, Yan 1; Jiang, Ping 1; Yuan, Fuping 1,2; Wang, Yandong 4; Ren, Yang 5; Du, Kui 3; Wei, Yueguang 6; Wu, Xiaolei 1,2
通讯作者	Wu, Xiaolei(xlwu@imech.ac.cn)
	2024-04-11
发表期刊	NATURE MATERIALS
ISSN	1476-1122
页码	16
摘要	The strength-ductility trade-off has long been a Gordian knot in conventional metallic structural materials and it is no exception in multi-principal element alloys. In particular, at ultrahigh yield strengths, plastic instability, that is, necking, happens prematurely, because of which ductility almost entirely disappears. This is due to the growing difficulty in the production and accumulation of dislocations from the very beginning of tensile deformation that renders the conventional dislocation hardening insufficient. Here we propose that premature necking can be harnessed for work hardening in a VCoNi multi-principal element alloy. Luders banding as an initial tensile response induces the ongoing localized necking at the band front to produce both triaxial stress and strain gradient, which enables the rapid multiplication of dislocations. This leads to forest dislocation hardening, plus extra work hardening due to the interaction of dislocations with the local-chemical-order regions. The dual work hardening combines to restrain and stabilize the premature necking in reverse as well as to facilitate uniform deformation. Consequently, a superior strength-and-ductility synergy is achieved with a ductility of similar to 20% and yield strength of 2 GPa during room-temperature and cryogenic deformation. These findings offer an instability-control paradigm for synergistic work hardening to conquer the strength-ductility paradox at ultrahigh yield strengths.
资助者	National Natural Science Foundation of China (National Science Foundation of China) ; National Key Research and Development Program of China, Ministry of Science and Technology ; Strategic Priority Research Program ; Chinese Academy of Sciences ; Academician-&-Expert Workstation ; Nature Science Foundation of China (NSFC) ; NSFC ; City University of Hong Kong
DOI	10.1038/s41563-024-01871-7
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (National Science Foundation of China)[2019YFA0209900] ; National Key Research and Development Program of China, Ministry of Science and Technology ; Strategic Priority Research Program[XDB0510300] ; Strategic Priority Research Program[XDB22040503] ; Chinese Academy of Sciences[202305AF150014] ; Academician-&-Expert Workstation[11988102] ; Academician-&-Expert Workstation[52192591] ; Academician-&-Expert Workstation[11972350] ; Nature Science Foundation of China (NSFC)[11890681] ; NSFC[9610533] ; City University of Hong Kong
WOS研究方向	Chemistry ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001200732900003
出版者	NATURE PORTFOLIO
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186980
专题	中国科学院金属研究所
通讯作者	Wu, Xiaolei
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China 4.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing, Peoples R China 5.City Univ Hong Kong, Ctr Neutron Scattering, Dept Phys, Kowloon, Hong Kong, Peoples R China 6.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Bowen,Duan, Huichao,Chen, Xuefei,et al. Harnessing instability for work hardening in multi-principal element alloys[J]. NATURE MATERIALS,2024:16.
APA	Xu, Bowen.,Duan, Huichao.,Chen, Xuefei.,Wang, Jing.,Ma, Yan.,...&Wu, Xiaolei.(2024).Harnessing instability for work hardening in multi-principal element alloys.NATURE MATERIALS,16.
MLA	Xu, Bowen,et al."Harnessing instability for work hardening in multi-principal element alloys".NATURE MATERIALS (2024):16.