In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum

doi:10.1038/s41467-020-14876-y

IMR OpenIR

	In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum
	Wang, Lihua 1; Du, Kui 2; Yang, Chengpeng 1; Teng, Jiao 3; Fu, Libo 1; Guo, Yizhong 1; Zhang, Ze 4; Han, Xiaodong 1
通讯作者	Zhang, Ze(zezhang@zju.edu.cn) ; Han, Xiaodong(xdhan@bjut.edu.cn)
	2020-03-03
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	11 期号:1 页码:9
摘要	Twin-thickness-controlled plastic deformation mechanisms are well understood for submicron-sized twin-structural polycrystalline metals. However, for twin-structural nanocrystalline metals where both the grain size and twin thickness reach the nanometre scale, how these metals accommodate plastic deformation remains unclear. Here, we report an integrated grain size and twin thickness effect on the deformation mode of twin-structural nanocrystalline platinum. Above a similar to 10nm grain size, there is a critical value of twin thickness at which the full dislocation intersecting with the twin plane switches to a deformation mode that results in a partial dislocation parallel to the twin planes. This critical twin thickness value varies from similar to 6 to 10nm and is grain size-dependent. For grain sizes between similar to 10 to 6nm, only partial dislocation parallel to twin planes is observed. When the grain size falls below 6nm, the plasticity switches to grain boundary-mediated plasticity, in contrast with previous studies, suggesting that the plasticity in twin-structural nanocrystalline metals is governed by partial dislocation activities.
资助者	Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China ; Beijing Outstanding Young Scientists Projects ; NSFC ; Beijing Natural Science Foundation ; 111 project ; Fok Ying-Tong Education Foundation of China ; Australian Research Council
DOI	10.1038/s41467-020-14876-y
收录类别	SCI
语种	英语
资助项目	Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China[51988101] ; Beijing Outstanding Young Scientists Projects[BJJWZYJH01201910005018] ; NSFC[11722429] ; NSFC[51771104] ; NSFC[91860202] ; Beijing Natural Science Foundation[Z180014] ; 111 project[DB18015] ; Fok Ying-Tong Education Foundation of China[151006] ; Australian Research Council[DP190102243]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000519260700002
出版者	NATURE PUBLISHING GROUP
引用统计	被引频次：82[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/321006/137693
专题	中国科学院金属研究所
通讯作者	Zhang, Ze; Han, Xiaodong
作者单位	1.Beijing Univ Technol, Beijing Key Lab Microstruct & Properties Adv Mat, Beijing 100022, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China 4.Zhejiang Univ, Dept Mat Sci, Hangzhou 310008, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lihua,Du, Kui,Yang, Chengpeng,et al. In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum[J]. NATURE COMMUNICATIONS,2020,11(1):9.
APA	Wang, Lihua.,Du, Kui.,Yang, Chengpeng.,Teng, Jiao.,Fu, Libo.,...&Han, Xiaodong.(2020).In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum.NATURE COMMUNICATIONS,11(1),9.
MLA	Wang, Lihua,et al."In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum".NATURE COMMUNICATIONS 11.1(2020):9.