The role of environmental exposure in the fatigue behaviour of an aluminium alloy

被引：25

作者：

Ruiz, J ^{[1
]}

Elices, M ^{[1
]}

机构：

[1] Univ Politecn Madrid, Dept Ciencia Mat, ETSI Caminos Canales & Puertos, E-28040 Madrid, Spain

来源：

CORROSION SCIENCE | 1997年 / 39卷 / 12期

关键词：

aluminium; SEM; corrosion fatigue; hydrogen embrittlement;

D O I：

10.1016/S0010-938X(97)00095-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper reports measurements of fatigue crack velocities for an aluminium alloy 7017-T651 in high purity gaseous environments with different values of water vapour pressure and frequency. Also a detailed fractographical analysis by SEM is presented and the fracture surface morphology is correlated with the testing parameters and with the crack stress intensity level. Within a range of environmental exposure (defined as the product between the pressure and the time available for surface reaction during one fatigue cycle) crack propagation rates depend linearly on the exposure. The experimental fatigue crack propagation data are satisfactorily explained in terms of a corrosion-fatigue model for gaseous environments. (C) 1997 Elsevier Science Ltd.

引用

页码：2117 / 2141

页数：25

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