Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing

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	Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing
	X. H. An; Q. Y. Lin; S. Qu; G. Yang; S. D. Wu; Z. F. Zhang
	2009
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	24 期号:12 页码:3636-3646
摘要	X-ray diffraction (XRD) and transmission electron microscope (TEM) investigations have been carried out to decode the influence of stacking-fault energy (SFE) on the accommodation of large shear deformation in Cu-Al alloys subjected to one-pass equal-channel angular pressing. XRD results exhibit that the microstrain and density of dislocations initially increased with the reduction in the SFE, whereas they sharply decreased with a further decrease in SFE. By systematic TEM observations, we noticed that the accommodation mechanism of intense shear strain was gradually transformed from dislocation slip to deformation twin when SFE was lowered. Meanwhile, twin intersections and internal twins were also observed in the Cu-Al alloy with extremely low SFE. Due to the large external plastic deformation, microscale shear bands, as an inherent deformation mechanism, are increasingly significant to help carry the high local plasticity because low SFE facilitates the formation of shear bands.
部门归属	[an, xianghai; lin, qingyun; qu, shen; wu, shiding; zhang, zhe-feng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [yang, gang] cent iron & steel res inst, beijing 100081, peoples r china.;wu, sd (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;shdwu@imr.ac.cn zhfzhang@imr.ac.cn
关键词	Severe Plastic-deformation High-pressure Torsion Grain-refinement Mechanical-properties Microstructural Evolution Nanostructured Materials Stainless-steel Single-crystal Copper Temperatures
URL	查看原文
WOS记录号	WOS:000272412500020
引用统计	被引频次：66[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/321006/31812
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. H. An,Q. Y. Lin,S. Qu,et al. Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing[J]. Journal of Materials Research,2009,24(12):3636-3646.
APA	X. H. An,Q. Y. Lin,S. Qu,G. Yang,S. D. Wu,&Z. F. Zhang.(2009).Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing.Journal of Materials Research,24(12),3636-3646.
MLA	X. H. An,et al."Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing".Journal of Materials Research 24.12(2009):3636-3646.