Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading

doi:10.1103/PhysRevLett.122.126101

CORC > 金属研究所 > 中国科学院金属研究所

	Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading
	Zhou, Xin 1,2; Li, Xiuyan 1; Lu, K.1
刊名	PHYSICAL REVIEW LETTERS
	2019-03-28
卷号	122 期号:12 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.122.126101
通讯作者	Li, Xiuyan(xyli@imr.ac.cn) ; Lu, K.(lu@imr.ac.cn)
英文摘要	The greatly increased grain boundary (GB) mobility in nanograined metals under mechanical loading is distinguished from that in their coarse-grained counterparts. The feature leads to softening of nanograined materials and deviation of strength from the classical Hall-Petch relationship. In this Letter, grain size dependences of GB migration in nanograined Ag, Cu, and Ni under tension were investigated quantitatively in a wide size range. As grain size decreases from submicron, GB migration intensifies and then diminishes below a critical grain size. The GB migration peaks at about 80, 75, and 38 nm in Ag, Cu, and Ni, respectively. The suppression of GB migration below a critical size can be attributed to GB relaxation during sample processing or by postthermal annealing. With relaxed GBs the governing deformation mechanism of nanograins shifts from GB migration to formation of through-grain twins or stacking faults. GB relaxation, analogous to GB segregation, offers a novel approach to stabilizing nanograined materials under mechanical loading.
资助项目	Ministry of Science & Technology of China[2017YFA0204401] ; Ministry of Science & Technology of China[2017YFA0700700] ; Ministry of Science & Technology of China[2012CB932201] ; National Science Foundation of China[51231006] ; Chinese Academy of Sciences[zdyz201701]
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000462936100007
资助机构	Ministry of Science & Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132612]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Xiuyan; Lu, K.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Xin,Li, Xiuyan,Lu, K.. Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading[J]. PHYSICAL REVIEW LETTERS,2019,122(12):6.
APA	Zhou, Xin,Li, Xiuyan,&Lu, K..(2019).Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading.PHYSICAL REVIEW LETTERS,122(12),6.
MLA	Zhou, Xin,et al."Size Dependence of Grain Boundary Migration in Metals under Mechanical Loading".PHYSICAL REVIEW LETTERS 122.12(2019):6.