Size dependence of rate-controlling deformation mechanisms in nanotwinned copper

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	Size dependence of rate-controlling deformation mechanisms in nanotwinned copper
	L. Lu; M. Dao; T. Zhu; J. Li
	2009
发表期刊	Scripta Materialia
ISSN	1359-6462
卷号	60 期号:12 页码:1062-1066
摘要	Nanotwinned metals exhibit an unusual combination of ultrahigh strength, considerable ductility and enhanced rate sensitivity. We find that a Hall-Petch-type relationship closely fits the experiment data of activation volume as a function of twin spacing. The results suggest a transition of the rate-controlling mechanism from intra-twin- to twin-boundary-mediated processes with decreasing twin lamellar thickness. These findings provide insights into the possible routes for optimizing the strength and ductility of nanostructured metals by tailoring internal interfaces. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[lu, lei] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [lu, lei; dao, ming] mit, dept mat sci & engn, cambridge, ma 02139 usa. [zhu, ting] georgia inst technol, george w woodruff sch mech engn, atlanta, ga 30332 usa. [li, ju] univ penn, dept mat sci & engn, philadelphia, pa 19104 usa.;lu, l (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;llu@imr.ac.cn
关键词	Twin Boundary Size Dependence Rate-controlling Mechanism Activation Volume Strain-rate Sensitivity Coherent Twin Boundaries Centered-cubic Metals Nano-scale Twins Nanoscale Twins Activation Volume Strength Nanocrystalline Ductility Fcc
URL	查看原文
WOS记录号	WOS:000265813000007
引用统计	被引频次：91[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/321006/32153
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Lu,M. Dao,T. Zhu,et al. Size dependence of rate-controlling deformation mechanisms in nanotwinned copper[J]. Scripta Materialia,2009,60(12):1062-1066.
APA	L. Lu,M. Dao,T. Zhu,&J. Li.(2009).Size dependence of rate-controlling deformation mechanisms in nanotwinned copper.Scripta Materialia,60(12),1062-1066.
MLA	L. Lu,et al."Size dependence of rate-controlling deformation mechanisms in nanotwinned copper".Scripta Materialia 60.12(2009):1062-1066.