Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu

doi:10.1007/s11431-020-1584-6

IMR OpenIR

	Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu
	You Zesheng 1; Luo Shusen 2; Lu Lei 2
通讯作者	You Zesheng(zsyou@njust.edu.cn) ; Lu Lei(llu@imr.ac.cn)
	2020-05-11
发表期刊	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN	1674-7321
页码	9
摘要	Herein, we fabricated a heterogeneous nanostructured Cu with deformation nanotwin bundles (NTBs) embedded in a matrix of nanograins by means of dynamic plastic deformation at liquid nitrogen temperature. We conducted fracture mechanical measurements to investigate the effect of longitudinal length of the NTBs on their strengthening and toughening. Results suggest that an increase in the NTB length had a marginal influence on the tensile strength; however, it remarkably promoted both fracture initiation toughness and crack growth toughness. Longer NTBs are more effective not only in intrinsically enhancing crack tip plasticity by suppressing the strain localization and void nucleation but also in serving as crack bridges behind the crack front to extrinsically resist the fracture by shielding the crack tip.
关键词	fracture toughness nanotwins J-integral size effect toughening mechanism
资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science and the International Partnership Program ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program
DOI	10.1007/s11431-020-1584-6
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFA0204403] ; National Natural Science Foundation of China[U1608257] ; National Natural Science Foundation of China[51931010] ; Key Research Program of Frontier Science and the International Partnership Program[GJHZ2029] ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program[XLYC1802026]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS记录号	WOS:000532654000001
出版者	SCIENCE PRESS
引用统计	被引频次：7[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/321006/138753
专题	中国科学院金属研究所
通讯作者	You Zesheng; Lu Lei
作者单位	1.Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Nanjing 210094, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	You Zesheng,Luo Shusen,Lu Lei. Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020:9.
APA	You Zesheng,Luo Shusen,&Lu Lei.(2020).Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,9.
MLA	You Zesheng,et al."Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2020):9.