Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion

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	Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion; Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion
	X. H. An; Q. Y. Lin; S. D. Wu; Z. F. Zhang; R. B. Figueiredo; N. Gao; T. G. Langdon
	2011 ; 2011
发表期刊	Philosophical Magazine ; Philosophical Magazine
ISSN	1478-6435 ; 1478-6435
卷号	91 期号:25 页码:3307-3326
摘要	Disks of pure Cu and several Cu-Al alloys were processed by high-pressure torsion (HPT) at room temperature through different numbers of turns to systematically investigate the influence of the stacking fault energy (SFE) on the evolution of microstructural homogeneity. The results show there is initially an inhomogeneous microhardness distribution but this inhomogneity decreases with increasing numbers of turns and the saturation microhardness increases with increasing Al concentration. Uniform microstructures are more readily achieved in materials with high or low SFE than in materials with medium SFE, because there are different mechanisms governing the microstructural evolution. Specifically, recovery processes are dominant in high or medium SFE materials, whereas twin fragmentation is dominant in materials having low SFE. The limiting minimum grain size (d(min)) of metals processed by HPT decreases with decreasing SFE and there is additional evidence suggesting that the dependence of d(min) on the SFE decreases when the severity of the external loading conditions is increased.; Disks of pure Cu and several Cu-Al alloys were processed by high-pressure torsion (HPT) at room temperature through different numbers of turns to systematically investigate the influence of the stacking fault energy (SFE) on the evolution of microstructural homogeneity. The results show there is initially an inhomogeneous microhardness distribution but this inhomogneity decreases with increasing numbers of turns and the saturation microhardness increases with increasing Al concentration. Uniform microstructures are more readily achieved in materials with high or low SFE than in materials with medium SFE, because there are different mechanisms governing the microstructural evolution. Specifically, recovery processes are dominant in high or medium SFE materials, whereas twin fragmentation is dominant in materials having low SFE. The limiting minimum grain size (d(min)) of metals processed by HPT decreases with decreasing SFE and there is additional evidence suggesting that the dependence of d(min) on the SFE decreases when the severity of the external loading conditions is increased.
部门归属	[an, x. h.; lin, q. y.; wu, s. d.; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [figueiredo, r. b.] univ fed minas gerais, dept met & mat engn, br-31270901 belo horizonte, mg, brazil. [gao, n.; langdon, t. g.] univ southampton, sch engn sci, mat res grp, southampton so17 1bj, hants, england. [langdon, t. g.] univ so calif, dept aerosp & mech engn, los angeles, ca 90089 usa. [langdon, t. g.] univ so calif, dept mat sci, los angeles, ca 90089 usa.;an, xh (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;xhan@imr.ac.cn zhfzhang@imr.ac.cn ; [an, x. h.; lin, q. y.; wu, s. d.; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [figueiredo, r. b.] univ fed minas gerais, dept met & mat engn, br-31270901 belo horizonte, mg, brazil. [gao, n.; langdon, t. g.] univ southampton, sch engn sci, mat res grp, southampton so17 1bj, hants, england. [langdon, t. g.] univ so calif, dept aerosp & mech engn, los angeles, ca 90089 usa. [langdon, t. g.] univ so calif, dept mat sci, los angeles, ca 90089 usa.;an, xh (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;xhan@imr.ac.cn zhfzhang@imr.ac.cn
关键词	Copper Copper Cu-al Alloys Cu-al Alloys Stacking Fault Energy Stacking Fault Energy High-pressure Torsion High-pressure Torsion Hardness Hardness Homogeneity Homogeneity Severe Plastic-deformation Severe Plastic-deformation Centered-cubic Metals Centered-cubic Metals Grain-refinement Grain-refinement Mechanical-properties Mechanical-properties Nanostructure Formation Nanostructure Formation Structural Refinement Structural Refinement Aluminum-alloy Aluminum-alloy Shear Strain Shear Strain Pure Metals Pure Metals Copper Copper
URL	查看原文 ; 查看原文
WOS记录号	WOS:000298582100001 ; WOS:000298582100001
引用统计	被引频次：82[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/321006/30236
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. D. Wu,et al. Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion, Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion[J]. Philosophical Magazine, Philosophical Magazine,2011, 2011,91, 91(25):3307-3326, 3307-3326.
APA	X. H. An.,Q. Y. Lin.,S. D. Wu.,Z. F. Zhang.,R. B. Figueiredo.,...&T. G. Langdon.(2011).Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion.Philosophical Magazine,91(25),3307-3326.
MLA	X. H. An,et al."Significance of stacking fault energy on microstructural evolution in Cu and Cu-Al alloys processed by high-pressure torsion".Philosophical Magazine 91.25(2011):3307-3326.

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