Microstructure and properties of Cu-11Fe-6Ag in situ composite after thermo-mechanical treatments

被引：39

作者：

Gao, Haiyan ^{[1
]}

Wang, Jun ^{[1
]}

Shu, Da ^{[1
]}

Sun, Baode ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 438卷 / 1-2期

关键词：

copper; composite; thermo-mechanical processing; Vickers hardness; electrical conductivity;

D O I：

10.1016/j.jallcom.2006.08.027

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：

Thermo-mechanical treatments with stepped annealing were investigated to improve the strength and conductivity of Cu-1 lFe-6Ag in situ composite. Changes in microstructure, Vickers hardness and conductivity of the heat-treated composite were studied. The results show that stepped annealing at a certain draw ratio produce better combination of strength and conductivity. After three stepped annealing at 77 = 4.1, 5.5 and 6.9, Cu-1 lFe-6Ag obtain strength/conductivity combination of 1140 MPa/68% IACS at eta = 7.6 and 1260 MPa/63.8% IACS at eta = 8.3, which are the best combination reported for Cu-Fe system to date. However, that of the same processed Cu-12Fe is only 962 MPa/62% IACS at eta = 7.6. The two composites exhibit different responses to the treatment due to the role of Ag: strengthening the composite in the form of precipitations and fibers and accelerating precipitation kinetics of Fe from the matrix. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：268 / 273

页数：6

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