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Deformation behaviour of electrodeposited nanocrystalline Ni with broad grain size distribution
Xu WC; Dai PQ; Wu XL(武晓雷)
Source PublicationMaterials Science and Technology
AbstractIn 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.
Indexed BySCI
WOS IDWOS:000278470500014
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationFuzhou University ; Foundation of Fujian [2008J0145-E0810006] ; National 863 projects of China [2007AA032325]
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorDai PQ
Recommended Citation
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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