Mechanics of gradient nanostructured metals

doi:10.1016/j.jmps.2024.105719

IMR OpenIR

	Mechanics of gradient nanostructured metals
	Zhang, Yin 1; Cheng, Zhao 2; Zhu, Ting 3; Lu, Lei 2
通讯作者	Zhu, Ting(ting.zhu@me.gatech.edu) ; Lu, Lei(llu@imr.ac.cn)
	2024-08-01
发表期刊	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
ISSN	0022-5096
卷号	189 页码:18
摘要	The emergence of heterogeneous nanostructured materials (HNMs) offers exciting opportunities to achieve outstanding mechanical properties. Among these materials, gradient nanotwinned (GNT) Cu is a prominent class of HNMs, demonstrating superior strengths by gaining extra strengths compared to non-gradient counterparts. Its layered gradient structure provides a simplified quasi-one-dimensional model system for understanding the extra strengthening effects of structural gradients and resulting plastic strain gradients. This paper presents a comprehensive report for recent experimental and modeling studies on the mechanics of GNT Cu, covering advances in controlled material processing, back stress measurement, deformation field characterization, dislocation microstructure analysis, and strain gradient plasticity modeling. These studies unveil the spatiotemporal evolution of both plastic strain gradients and extra back stresses originating from structural gradients. Direct connections are established between the sample-level extra strength of GNT Cu and the synergistic strengthening effects induced by local nanotwin structures and their gradients. We emphasize the critical role of the size of the representative volume element in assessing the effects of plastic strain gradient and extra back stress. Moreover, lower-order strain gradient plasticity models are validated through experimental characterizations of GNT Cu, paving the way for future investigation into the mechanics of gradient nanostructured metals. Finally, we provide an outlook on research needs for understanding the mechanics of gradient nanostructured metals and, more broadly, HNMs, towards achieving exceptional mechanical properties.
关键词	Gradient nanotwinned Cu Strain gradient plasticity modeling Representative volume element Extra strength Back stress
资助者	National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) ; NSFC ; Youth Innovation Promotion Association, CAS
DOI	10.1016/j.jmps.2024.105719
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51931010] ; National Natural Science Foundation of China (NSFC)[92163202] ; Chinese Academy of Sciences (CAS) ; NSFC[52371124] ; NSFC[52001312] ; Youth Innovation Promotion Association, CAS
WOS研究方向	Materials Science ; Mechanics ; Physics
WOS类目	Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
WOS记录号	WOS:001251154000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：9[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/321006/187198
专题	中国科学院金属研究所
通讯作者	Zhu, Ting; Lu, Lei
作者单位	1.Peking Univ, Dept Mech & Engn Sci, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Georgia Inst Technol, Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
推荐引用方式 GB/T 7714	Zhang, Yin,Cheng, Zhao,Zhu, Ting,et al. Mechanics of gradient nanostructured metals[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2024,189:18.
APA	Zhang, Yin,Cheng, Zhao,Zhu, Ting,&Lu, Lei.(2024).Mechanics of gradient nanostructured metals.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,189,18.
MLA	Zhang, Yin,et al."Mechanics of gradient nanostructured metals".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 189(2024):18.