Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution

doi:10.1179/174328409X448457

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	Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution
	Xu WC; Dai PQ; Wu XL(武晓雷)
发表期刊	Materials Science and Technology
	2010
卷号	26 期号:5 页码:591-596
ISSN	0267-0836
摘要	In the present work, nanocrystalline Ni (nc-Ni) with a broad grain size distribution (BGSD) of 5-120 nm and an average grain size of 27.2 nm was prepared. The BGSD nc-Ni sample shows a similar strength and good ductility in comparison with electrodeposited nc-Ni with a narrow grain size distribution. The intracrystalline dislocation network was observed in the post-deformed microstructure confirming the conventional intracrystalline dislocation sliding mechanism in BGSD nc-Ni. The uniaxial tensile loading-unloading-loading deformation shows BGSD nc-Ni has the capability to store dislocations in the grain interior, which is very limited compared with that of coarse grained metals. For BGSD nc-Ni, the strain rate sensitivity of flow stress m enhances with decreasing strain rate. At the strain rate of 5 x 10(-6) s(-1), m was estimated to be 0.055. At the corresponding strain rate, the enhanced ductility along with the decreased strength was achievable, indicating activation of other deformation mechanisms, e. g. grain boundary sliding or diffusion.
DOI	10.1179/174328409X448457
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000278470500014
关键词[WOS]	NANOSTRUCTURED METAL ; TENSILE DUCTILITY ; COPPER ; MECHANISMS ; STRENGTH ; NICKEL ; CU
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
项目资助者	Fuzhou University ; Foundation of Fujian [2008J0145-E0810006] ; National 863 projects of China [2007AA032325]
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/43505
专题	非线性力学国家重点实验室
通讯作者	Dai PQ
推荐引用方式 GB/T 7714	Xu WC,Dai PQ,Wu XL. Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution[J]. Materials Science and Technology,2010,26,5,:591-596.
APA	Xu WC,Dai PQ,&武晓雷.(2010).Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution.Materials Science and Technology,26(5),591-596.
MLA	Xu WC,et al."Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution".Materials Science and Technology 26.5(2010):591-596.

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