EFFECT OF ALUMINA STRENGTHENING PARTICLES ON BRAZED JOINTS OF GLIDCOP AL-15 COPPER ALLOY

被引：9

作者：

CHEN, S

LIU, JY

CHIN, BA

机构：

[1] Materials Engineering, Auburn University, Auburn

来源：

JOURNAL OF NUCLEAR MATERIALS | 1994年 / 212卷

关键词：

D O I：

10.1016/0022-3115(94)91097-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Brazed joints of the alumina dispersion-strengthened copper alloy were developed using resistance heating brazing with BCuP-3 braze alloy. Experimental results show that tensile strength and fatigue properties are a function of the brazing process temperature cycle. Maximum tensile and fatigue properties can be obtained by choice of an optimal braze time and temperature. However, in both tensile and fatigue tests the brazed joints exhibited low ductility. Metallography of the fractured tensile and fatigue samples showed that cracks always initiated in and propagated along the interface between the transition layer and the braze metal. EDS analysis across the joint showed that P diffused very quickly into base metal along grain boundaries. A strong Al peak (associated with the detection of Al2O3) was found that corresponded with the transition layer. Fractography showed an intergranular fracture pattern across this transition zone indicating that the observed segregation of alumina particles reduces the ductility of this region.

引用

页码：1600 / 1603

页数：4