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
刊名	Acta Materialia
	2012
卷号	60 期号:1 页码:269-281
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
ISSN号	1359-6454
中文摘要	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.
原文出处	://WOS:000297822300027
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/60269]
专题	金属研究所_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.