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MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING
Wu Shiding; An Xianghai; Han Weizhong; Qu Shen; Zhang Zhefeng
Corresponding AuthorZhang Zhefeng(zhfzhang@imr.ac.cn)
2010-03-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume46Issue:3Pages:257-276
AbstractMicrostructure evolution, grain refinement mechanism and mechanical properties of face-centered cubic (fcc) metallic materials, subjected to equal channel angular pressing (ECAP), were systematically investigated. According to the special shear deformation mode of ECAP, Al single crystals with different orientations and Cu bicrystals with different initial grain boundary directions were subjected to ECAP for one pass, and it is found that shear deformations both parallel and perpendicular to intersection plane play important roles in the ECAP process. Moreover, Al single crystals, Cu single crystals and polycrystalline Cu-3%Si (mass fraction) alloy with different stacking fault energies (SFEs) and special crystallographic orientations, subjected to ECAP for one pass, were selected to experimentally and analytically explore the combined effects of crystallographic orientation, SFE and grain size on deformation twinning behaviors in several fcc crystals. Furthermore, ultrafine grained (UFG) or nanocrystalline (NC) Cu-Al alloys with different Al contents were prepared using multiple-passes ECAP. The results show that the grain refinement mechanism is gradually transformed from dislocation subdivision to twin fragmentation, and the equilibrium grain size decreases with lowering the SFE of Cu-Al alloys. Meanwhile, the homogeneous microstructures of materials with high or low SEE are much more readily gained than those of medium-SFE metals. More significantly, the strength and uniform elongation can be simultaneously improved with lowering the SEE, i.e., the better strength-ductility combination is achieved in the Cu-Al alloy with lower SFE.
Keywordequal channel angular pressing fcc metal microstructure grain refinement mechanical property
Funding OrganizationNational Natural Science Foundation of China
DOI10.3724/SP.J.1037.2009.00748
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50171072] ; National Natural Science Foundation of China[50571102] ; National Natural Science Foundation of China[50625103] ; National Natural Science Foundation of China[50890173] ; National Natural Science Foundation of China[50841024] ; National Natural Science Foundation of China[50931005]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000276824000001
PublisherSCIENCE PRESS
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/102344
Collection中国科学院金属研究所
Corresponding AuthorZhang Zhefeng
AffiliationChinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wu Shiding,An Xianghai,Han Weizhong,et al. MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING[J]. ACTA METALLURGICA SINICA,2010,46(3):257-276.
APA Wu Shiding,An Xianghai,Han Weizhong,Qu Shen,&Zhang Zhefeng.(2010).MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING.ACTA METALLURGICA SINICA,46(3),257-276.
MLA Wu Shiding,et al."MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING".ACTA METALLURGICA SINICA 46.3(2010):257-276.
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