Microstructure evolution and properties of Cu-Cr alloy during continuous extrusion process

被引：64

作者：

Yuan, Yuan ^{[1
,2
]}

Li, Zhou ^{[1
,3
]}

Xiao, Zhu ^{[1
,4
]}

Zhao, Ziqian ^{[1
]}

Yang, Ziqi ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Kang Yuan New Mat Co Ltd, China Railway Construct Electrificat Bur Grp, Jiangyin 214521, Peoples R China

[3] State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[4] Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 703卷

基金：

中国国家自然科学基金;

关键词：

Cu-Cr alloy; Continuous extrusion; Dislocations; Recrystallization; Hardness; ELECTRICAL-CONDUCTIVITY; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; ZR; DEFORMATION; CONFORM;

D O I：

10.1016/j.jallcom.2017.01.355

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure evolution and properties of a typical precipitation strengthened Cu-0.82Cr alloy during continuous extrusion were investigated by means of optical microscopy, transmission electron microscopy, hardness and conductivity measurement. The severe plastic deformation and precipitation behavior of the alloy during deformation were discussed in detail. The results showed that hardness increased firstly until reaching the maximum value of 148 HB in right-angle bending, and then decreased in the extending extrusion zone. Severe deformation and precipitation process occurred during continuous extrusion, and the nano-scale precipitates inhibited the recrystallization in some extent, both of which contributed to the properties of the extruded alloy. The extruded alloy had an average grain size of about 1.5 mu m, and it reached a yield strength, ultra-strength, elongation and electrical conductivity of 292 MPa, 346 MPa, 34% and 77.5% IACS, respectively. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：454 / 460

页数：7