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Study on nanocrystalline dual phase Ni-Co alloy with high strength and excellent ductility
Xu WC; Dai PQ; Wu XL(武晓雷); Tang D; Dai, PQ (reprint author), Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China
Source PublicationMaterials Science and Technology
2011
Volume27Issue:1Pages:320-324
ISSN0267-0836
AbstractIn the present study, the room temperature mechanical properties of nanocrystalline Ni and Ni-75 wt-%Co alloy, prepared by pulse electrodeposition, were contrasted. Both higher strength and higher ductility were obtained for the Ni-75% Co alloy with a dual phase structure and an average grain size of 7.2 nm. By means of TEM observations of grain structures before and after tensile deformation for Ni and Ni-75% Co samples, a link between the ductility and the variation of stress induced grain growth during tensile deformation was established. Observations of TEM showed stress induced grain growth during tensile deformation, subjected to very high stresses and large strains, is very insignificant for the Ni-75% Co alloy in sharp contrast to the significant stress induced grain growth occurring in Ni. It was proposed that suppression of stress induced grain growth during tensile deformation can delay and even prohibit formation of shear banding plastic instability and thus enhances uniform strain leading to an enhanced ductility.
KeywordNanocrystalline Ni-co Mechanical Property Tensile Ductility Grain Growth Dual Phase Structure Tensile Plastic-deformation Grain-boundary Temperature Nickel Microstructure Growth Metals Copper Cobalt Creep
Subject AreaMaterials Science ; Metallurgy & Metallurgical Engineering
DOI10.1179/026708309X12506933873224
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000285870400055
WOS KeywordTENSILE PLASTIC-DEFORMATION ; GRAIN-BOUNDARY ; TEMPERATURE ; NICKEL ; MICROSTRUCTURE ; GROWTH ; METALS ; COPPER ; COBALT ; CREEP
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationThe financial support provided by the Innovation Project of Fuzhou University, the Foundations of Fujian Provincial Natural Science Research Programme (project no. 2008J0145-E0810006) and the National 863 Projects of China (project no. 2007AA03Z325) is gratefully acknowledged.
DepartmentLNM材料介观力学性能的表征
ClassificationQ3
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44954
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. Study on nanocrystalline dual phase Ni-Co alloy with high strength and excellent ductility[J]. Materials Science and Technology,2011,27(1):320-324.
APA Xu WC,Dai PQ,武晓雷,Tang D,&Dai, PQ .(2011).Study on nanocrystalline dual phase Ni-Co alloy with high strength and excellent ductility.Materials Science and Technology,27(1),320-324.
MLA Xu WC,et al."Study on nanocrystalline dual phase Ni-Co alloy with high strength and excellent ductility".Materials Science and Technology 27.1(2011):320-324.
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