IMECH-IR  > 非线性力学国家重点实验室
Effect of Stress-Induced Grain Growth During Room Temperature Tensile Deformation on Ductility in Nanocrystalline Metals
Xu WC; Dai PQ; Wu XL(武晓雷); Dai, PQ (reprint author), Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China.
Source PublicationBULLETIN OF MATERIALS SCIENCE
2010
Volume33Issue:5Pages:561-568
ISSN0250-4707
AbstractIn the present study defect-free nanocrystalline (nc) Ni-Co alloys with the Co content ranging from 2.4-59.3% (wt.%) were prepared by pulse electrodeposition. X-ray diffraction analysis shows that only a single face-centred cubic solid solution is formed for each alloy and that the grain size reduces monotonically with increasing Co content, which is consistent with transmission electron microscopy (TEM) observations. In the nc Ni-Co alloys, both the ultimate tensile strength and the elongation to failure increase as the Co content increases. The TEM observations reveal that stress-induced grain growth during tensile deformation is significantly suppressed for the nc Ni-Co alloys rich in Co in sharp contrast to those poor in Co. We believe that sufficient solutes could effectively pin grain boundaries making grain boundary motions (e.g. grain boundary migration and/or grain rotation) during deformation more difficult. Thus, stress-induced grain growth is greatly suppressed. At the same time, shear banding plasticity instability is correspondingly delayed leading to the enhanced ductility.
KeywordNanocrystalline Ni-co Mechanical Property Ductility Grain Growth
Indexed BySCI ; EI
Language英语
WOS IDWOS:000286346700008
WOS KeywordCENTERED-CUBIC METALS ; STACKING-FAULT ENERGY ; PLASTIC-DEFORMATION ; BOUNDARY ; ALLOYS ; COPPER ; NI ; DYNAMICS ; NICKEL ; MICROSTRUCTURE
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding OrganizationNatural Science Foundation of Fujian Province [E0810006] ; National 863 projects of China [2007AA03Z325]
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58601
Collection非线性力学国家重点实验室
Corresponding AuthorDai, PQ (reprint author), Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China.
Recommended Citation
GB/T 7714
Xu WC,Dai PQ,Wu XL,et al. Effect of Stress-Induced Grain Growth During Room Temperature Tensile Deformation on Ductility in Nanocrystalline Metals[J]. BULLETIN OF MATERIALS SCIENCE,2010,33(5):561-568.
APA Xu WC,Dai PQ,武晓雷,&Dai, PQ .(2010).Effect of Stress-Induced Grain Growth During Room Temperature Tensile Deformation on Ductility in Nanocrystalline Metals.BULLETIN OF MATERIALS SCIENCE,33(5),561-568.
MLA Xu WC,et al."Effect of Stress-Induced Grain Growth During Room Temperature Tensile Deformation on Ductility in Nanocrystalline Metals".BULLETIN OF MATERIALS SCIENCE 33.5(2010):561-568.
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