Ductility by shear band delocalization in the nano-layer of gradient structure

doi:10.1080/21663831.2018.1546238

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Ductility by shear band delocalization in the nano-layer of gradient structure
	Yuan FP(袁福平); Yan DS(严定舜); Sun JD(孙将达); Zhou LL(周玲玲); Zhu YT;武晓雷
刊名	MATERIALS RESEARCH LETTERS
	2019
卷号	7 期号:1 页码:12-17
关键词	Gradient structure ductility shear band strain delocalization back-stress hardening
ISSN号	2166-3831
DOI	10.1080/21663831.2018.1546238
通讯作者	Zhu, Yuntian(ytzhu@ncsu.edu) ; Wu, Xiaolei(xlwu@imech.ac.cn)
英文摘要	Nanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon after yielding, converting the shear band into a localized strain zone (LSZ). Synergistic work hardening was developed in the LSZ by regaining dislocation hardening capability, and by back-stress hardening from the strain gradients in the axial and depth directions, which helped with enhancing global ductility. [GRAPHICS]
分类号	一类
资助项目	National Key Basic Research Program of China[2017YFA 0204402] ; National Key Basic Research Program of China[2017YFA0204403] ; National Natural Science Foundation of China (NSFC)[11472286] ; National Natural Science Foundation of China (NSFC)[11572328] ; National Natural Science Foundation of China (NSFC)[11672313] ; National Natural Science Foundation of China (NSFC)[11790293] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; US Army Research Office[W911 NF-12-1-0009]
WOS关键词	HIGH-STRENGTH ; DEFORMATION ; DISLOCATION ; PLASTICITY ; METALS
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000463802000002
资助机构	National Key Basic Research Program of China ; National Natural Science Foundation of China (NSFC) ; Strategic Priority Research Program of the Chinese Academy of Sciences ; US Army Research Office
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78332]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Yuan FP,Yan DS,Sun JD,et al. Ductility by shear band delocalization in the nano-layer of gradient structure[J]. MATERIALS RESEARCH LETTERS,2019,7(1):12-17.
APA	Yuan FP,Yan DS,Sun JD,Zhou LL,&Zhu YT；武晓雷.(2019).Ductility by shear band delocalization in the nano-layer of gradient structure.MATERIALS RESEARCH LETTERS,7(1),12-17.
MLA	Yuan FP,et al."Ductility by shear band delocalization in the nano-layer of gradient structure".MATERIALS RESEARCH LETTERS 7.1(2019):12-17.