Microstructures, strengthening mechanisms and fracture behavior of Cu-Ag alloys processed by high-pressure torsion

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	Microstructures, strengthening mechanisms and fracture behavior of Cu-Ag alloys processed by high-pressure torsion
	Y. Z. Tian; J. J. Li; P. Zhang; S. D. Wu; Z. F. Zhang; M. Kawasaki; T. G. Langdon
	2012
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	60 期号:1 页码:269-281
摘要	Disks of a eutectic Cu-Ag alloy were processed by high-pressure torsion (HPT) up to 20 revolutions to reveal the microstructural evolution and mechanical properties. Both the Cu and Ag phases were thinned continuously with increasing numbers of revolutions. After 20 revolutions, the alternating Cu and Ag phases were significantly refined and became fibrous with dimensions as thin as 5 nm. The strain hardening behavior of the Cu-Ag alloy was characterized after different numbers of HPT revolutions, and a saturation microhardness was attained. It is shown that the tensile fracture mode changed from necking to fully brittle shearing with increasing numbers of revolutions, and some shear offsets with sizes of similar to 5-20 mu m were observed on the fracture surfaces. Based on the abnormal saturation microhardness value of the eutectic alloy, the strengthening mechanisms of various Cu-Ag alloys are discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[tian, y. z.; li, j. j.; zhang, p.; wu, s. d.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [kawasaki, m.; langdon, t. g.] univ so calif, dept aerosp & mech engn & mat sci, los angeles, ca 90089 usa. [langdon, t. g.] univ southampton, sch engn sci, mat res grp, southampton so17 1bj, hants, england.;zhang, zf (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.;zhfzhang@imr.ac.cn
关键词	Eutectic Cu-ag Alloy High-pressure Torsion Microstructure Hardness Fracture Severe Plastic-deformation Bulk Metallic-glass Grain-refinement Shear Fracture Composites Evolution Wires Nucleation
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60269
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Z. Tian,J. J. Li,P. Zhang,et al. Microstructures, strengthening mechanisms and fracture behavior of Cu-Ag alloys processed by high-pressure torsion[J]. Acta Materialia,2012,60(1):269-281.
APA	Y. Z. Tian.,J. J. Li.,P. Zhang.,S. D. Wu.,Z. F. Zhang.,...&T. G. Langdon.(2012).Microstructures, strengthening mechanisms and fracture behavior of Cu-Ag alloys processed by high-pressure torsion.Acta Materialia,60(1),269-281.
MLA	Y. Z. Tian,et al."Microstructures, strengthening mechanisms and fracture behavior of Cu-Ag alloys processed by high-pressure torsion".Acta Materialia 60.1(2012):269-281.