MICROSTRUCTURE EVOLUTION AND MECHANICAL PROPERTIES OF FCC METALLIC MATERIALS SUBJECTED TO EQUAL CHANNEL ANGULAR PRESSING

doi:10.3724/SP.J.1037.2009.00748

IMR OpenIR

	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
通讯作者	Zhang Zhefeng(zhfzhang@imr.ac.cn)
	2010-03-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	46 期号:3 页码:257-276
摘要	Microstructure 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.
关键词	equal channel angular pressing fcc metal microstructure grain refinement mechanical property
资助者	National Natural Science Foundation of China
DOI	10.3724/SP.J.1037.2009.00748
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000276824000001
出版者	SCIENCE PRESS
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/102344
专题	中国科学院金属研究所
通讯作者	Zhang Zhefeng
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 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.