The effect of stacking fault energy on equilibrium grain size and tensile properties of nanostructured copper and copper-aluminum alloys processed by equal channel angular pressing

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	The effect of stacking fault energy on equilibrium grain size and tensile properties of nanostructured copper and copper-aluminum alloys processed by equal channel angular pressing
	C. X. Huang; W. Hu; G. Yang; Z. F. Zhang; S. D. Wu; Q. Y. Wang; G. Gottstein
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	556 页码:638-647
摘要	Pure copper and copper-aluminum alloys (aluminum content of 2.3 at%, 7.2 at%, and 11.6 at% with stacking fault energies (SFEs) of about 48 mJ/m(2), 21 mJ/m(2), and 8 mJ/m(2), respectively) were processed by equal channel angular pressing (ECAP) at room temperature for 8 passes to generate a nanoscale grain size. The effect of SFE on microstructure refinement and tensile properties of these materials were investigated. Microstructural observations indicated that the grain size of as-ECAPed alloy decreased monotonically with increasing Al concentration, i.e. with decreasing SFE. A very low SFE was especially favorable for achieving a true nanocrystalline structure (e.g. d approximate to 57 nm in Cu-11.6 at% Al) by twinning and shear banding. The tensile strength and uniform elongation of nanostructured copper-aluminum alloys were simultaneously enhanced owing to the significant grain size refinement, solid solution strengthening and enhanced strain hardening capability. (c) 2012 Elsevier B.V. All rights reserved.
部门归属	[huang, c. x.; wang, q. y.] sichuan univ, dept mech, chengdu 610065, peoples r china. [huang, c. x.; hu, w.; gottstein, g.] rhein westfal th aachen, inst phys met & met phys, d-52056 aachen, germany. [yang, g.] cent iron & steel res inst, beijing 100081, peoples r china. [zhang, z. f.; wu, s. d.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;huang, cx (reprint author), sichuan univ, dept mech, chengdu 610065, peoples r china.;chxhuang@scu.edu.cn
关键词	Ecap Cu-al Alloy Stacking Fault Energy Nanostructure Strength And Ductility Cu-al Alloys Dynamic Plastic-deformation Microstructural Evolution Mechanical-behavior Shear Bands Strain-rate Zn Alloys Temperature Strength Refinement
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60006
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. X. Huang,W. Hu,G. Yang,et al. The effect of stacking fault energy on equilibrium grain size and tensile properties of nanostructured copper and copper-aluminum alloys processed by equal channel angular pressing[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,556:638-647.
APA	C. X. Huang.,W. Hu.,G. Yang.,Z. F. Zhang.,S. D. Wu.,...&G. Gottstein.(2012).The effect of stacking fault energy on equilibrium grain size and tensile properties of nanostructured copper and copper-aluminum alloys processed by equal channel angular pressing.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,556,638-647.
MLA	C. X. Huang,et al."The effect of stacking fault energy on equilibrium grain size and tensile properties of nanostructured copper and copper-aluminum alloys processed by equal channel angular pressing".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 556(2012):638-647.