Microstructural evolution and mechanical properties of Cu-Al alloys subjected to equal channel angular pressing

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	Microstructural evolution and mechanical properties of Cu-Al alloys subjected to equal channel angular pressing
	S. Qu; X. H. An; H. J. Yang; C. X. Huang; G. Yang; Q. S. Zang; Z. G. Wang; S. D. Wu; Z. F. Zhang
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:5 页码:1586-1601
摘要	Ultrafine-grained (UFG) or nanocrystalline (NC) Cu-Al alloys were prepared using equal-channel angular pressing (ECAP) to investigate the influence of stacking fault energy (SFE) oil the microstructural evolution during deformation and the corresponding mechanical properties. The gain refinement mechanism Was gradually transformed from dislocation Subdivision to twin fragmentation by tailoring the SFE of alloys. Meanwhile, homogeneous microstructures and nanoscale grains were readily achieved in the low-SFE Cu-Al alloys and the equilibrium grain size was decreased by lowering the SFE. Moreover, in the Cu-Al alloy with extremely low SFE, shear fracture occurred during ECAP at strain levels higher than two due to the formation of macroscopic shear bands. In addition, the normalized deformation conditions at large strain were qualitatively discussed. More significantly, the strength and uniform elongation were simultaneously improved by lowering the SFE. This Simultaneity results from the formation of profuse deformation twins and microscale shear bands, and their extensive intersections. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[qu, s.; an, x. h.; yang, h. j.; huang, c. x.; zang, q. s.; wang, z. g.; wu, s. d.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [yang, g.] cent iron & steel res inst, beijing 100081, peoples r china.;an, xh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;xhan@imr.ac.cn shdwu@imr.ac.cn zhfzhang@imr.ac.cn
关键词	Cu-al Alloys Stacking Fault Energy (Sfe) Equal Channel Angular Pressing (Ecap) Strength Ductility Stacking-fault Energy Severe Plastic-deformation High-pressure Torsion High-tensile Ductility Grain-refinement Nanostructure Formation Ultrahigh-strength Copper Strain Attrition
URL	查看原文
WOS记录号	WOS:000264454900030
引用统计	被引频次：351[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/321006/32252
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Qu,X. H. An,H. J. Yang,et al. Microstructural evolution and mechanical properties of Cu-Al alloys subjected to equal channel angular pressing[J]. Acta Materialia,2009,57(5):1586-1601.
APA	S. Qu.,X. H. An.,H. J. Yang.,C. X. Huang.,G. Yang.,...&Z. F. Zhang.(2009).Microstructural evolution and mechanical properties of Cu-Al alloys subjected to equal channel angular pressing.Acta Materialia,57(5),1586-1601.
MLA	S. Qu,et al."Microstructural evolution and mechanical properties of Cu-Al alloys subjected to equal channel angular pressing".Acta Materialia 57.5(2009):1586-1601.