EFFECTS OF ENVIRONMENT AND MICROSTRUCTURE ON STRESS-CORROSION CRACK-PROPAGATION IN AN AL-LI-CU-MG ALLOY

被引：7

作者：

AHMAD, M

机构：

[1] Department of Mechanical Engineering, Linköping Institute of Technology

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1990年 / 125卷 / 01期

关键词：

D O I：

10.1016/0921-5093(90)90246-Y

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Stress corrosion cracking behaviour of the 8090 (AlLiCuMg) alloy has been studied using fatigue-precracked double-cantilever-beam (DCB) specimens. The corrosion environment was either 3.5% NaCl solution or synthetic seawater. Total stress corrosion crack growth in the DCB specimens exposed to the synthetic seawater environment was generally greater than that for the 3.5% NaCl solution. Grain boundary microstructures of the 8090 alloy in a variety of aging conditions have been studied using transmission electron microscopy. Precipitation of I phase and δ (AlLi) phase on high angle grain boundaries resulted in δ′ (Al3Li) precipitate-free zones along the boundaries. Stress corrosion cracking resistance of the alloy is discussed in terms of grain boundary microstructure and corrosion environment. © 1990.

引用

页码：1 / 14

页数：14

共 30 条

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