Enhanced strain delocalization through formation of dispersive micro shear bands in laminated Ni

doi:10.1016/j.ijplas.2020.102745

IMR OpenIR

	Enhanced strain delocalization through formation of dispersive micro shear bands in laminated Ni
	Liang, Fei 1,2; Zhang, Bin 3; Yong, Yue 3; Luo, Xue-Mei 1; Zhang, Guang-Ping 1
通讯作者	Zhang, Bin(zhangb@atm.neu.edu.cn) ; Zhang, Guang-Ping(gpzhang@imr.ac.cn)
	2020-09-01
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
ISSN	0749-6419
卷号	132 页码:16
摘要	Nanocrystalline metals usually exhibit limited ductility due to catastrophic shear fracture caused by the preferential formation of a few premature shear bands during tensile deformation. In this work, the tensile and fracture behavior of laminated Ni with varied degree of difference in grain size of hard and soft layers were investigated. Compared with monolithic nanocrystalline Ni, laminated Ni with a large difference in the grain size of hard and soft layers exhibited enhanced elongation to failure without sacrificing tensile strength, because the formation of dispersive micro shear bands could undertake large plastic strain and lead to strain delocalization. With decreasing the difference in the grain size of hard and soft layers and the corresponding resistance to propagation of micro shear bands, there is a transition of fracture mode from ductile necking fracture accompanied with dispersive micro shear bands to shear fracture dominated by a few macroscopic premature shear bands. A mechanical model based on the transition from grain interior dislocation emission to grain-boundary-mediated deformation within the soft layers was proposed and the critical grain size of the soft layers corresponding to the optimum synergy of high strength and ductile necking fracture was obtained.
关键词	Laminated composite Necking Shear band Fracture Interface
资助者	National Natural Science Foundation of China (NSFC) ; Fundamental research project of Shenyang National Laboratory for Materials Science
DOI	10.1016/j.ijplas.2020.102745
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51971060] ; National Natural Science Foundation of China (NSFC)[51671050] ; National Natural Science Foundation of China (NSFC)[51771207] ; Fundamental research project of Shenyang National Laboratory for Materials Science[L2019R18]
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000553471300007
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：43[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/321006/140061
专题	中国科学院金属研究所
通讯作者	Zhang, Bin; Zhang, Guang-Ping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Liang, Fei,Zhang, Bin,Yong, Yue,et al. Enhanced strain delocalization through formation of dispersive micro shear bands in laminated Ni[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2020,132:16.
APA	Liang, Fei,Zhang, Bin,Yong, Yue,Luo, Xue-Mei,&Zhang, Guang-Ping.(2020).Enhanced strain delocalization through formation of dispersive micro shear bands in laminated Ni.INTERNATIONAL JOURNAL OF PLASTICITY,132,16.
MLA	Liang, Fei,et al."Enhanced strain delocalization through formation of dispersive micro shear bands in laminated Ni".INTERNATIONAL JOURNAL OF PLASTICITY 132(2020):16.