Two distinct fracture modes of copper alloys in fluoride environments

被引：7

作者：

Chen, YY ^{[1
]}

Tzou, RJ ^{[1
]}

Chang, YS ^{[1
]}

Wang, LH ^{[1
]}

Oung, JC ^{[1
]}

Shih, HC ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

来源：

CORROSION SCIENCE | 2005年 / 47卷 / 01期

关键词：

stress corrosion cracking; aluminum brass; aluminum bronze; slow strain rate technique; transgranular; intergranular;

D O I：

10.1016/j.corsci.2004.05.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The susceptibility of aluminum brass and aluminum bronze to stress corrosion cracking (SCC) was evaluated in fluoride environments by means of the slow strain rate technique. The effects of fluoride concentration and applied electrochemical potential on the SCC susceptibility were investigated. The SCC mechanism of aluminum brass was found to be dependent upon the de-alloying phenomenon while that of aluminum bronze on the film-rupture mechanism occurring within a certain range of applied electrochemical potentials. For aluminum brass, both the stress ratio and the time-to-fracture ratio were closely related to the logarithmic concentration of F- ions. The fracture modes were ductile dimpled tearing fracture for the aluminum brass at the corrosion potential while intergranular for the aluminum bronze at various anodic potentials. The micro-galvanic effects of the constituent elements were used to estimate the anodic equilibrium potentials of the two alloys. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：79 / 93

页数：15

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