ECAP铜基原位复合材料的组织与性能研究  

Microstructure and Properties of Copper-Based in Situ Composites by Equal Channel Angular Pressing

作　　者：王飞[1] 魏伟[1] 魏坤霞[1] 付猛[1] 胡静[1] 

机构地区：[1]江苏工业学院金属材料工程系,江苏常州213164

出　　处：《稀有金属》2009年第3期338-342,共5页Chinese Journal of Rare Metals

基　　金：江苏省国际科技合作资助项目(BZ2006018);常州市科技资助项目(CZ2006008)

摘　　要：室温下采用等通道变形(ECAP)制备了Cu-5.7%Cr原位复合材料,研究了其力学性能,电导率以及原位纤维的演变。结果表明:经过ECAP后,第二相Cr发生了旋转和伸长,逐渐演变为细小的纤维,且纤维逐渐倾向于与x轴平行。Cu-5.7%Cr合金的硬度,抗拉强度在2道次前显著增加,延伸率则迅速下降。2道次以后,硬度和抗拉强度的增加缓慢,延伸率则保持在20%左右。随着变形道次的增加,电导率逐渐降低,4道次后趋于稳定,8道次后达到80%IACS。Cu-5.7% Cr in situ composite was prepared by equal channel angular pressing （ECAP） at room temperature. The formation and evolution of in situ fibre composite, mechanical and electrical properties were investigated. The results showed that the rotation and elongation of Cr phase occurred during ECAP, which gradually became fine fibre and paralleled to the axis of x. The microhardness, tensile strength increased obviously before 2 passes, while the elongation to failure decreased rapidly. The microhardness and tensile strength increased slowly after 2 passes, but the elongation to failure retained 20%. With increasingthe passes of ECAP, the electrical conductivity decreased gradually, and then tended to become more stable after 4 passes, finally more than 80% IACS after 8 passes.

关 键 词：铜基原位复合材料 ECAP 组织 力学性能 电导率 

分 类 号：TG166.2[金属学及工艺—热处理] TB331[金属学及工艺—金属学]