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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 1    March 1995

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INFLUENCE OF AGING ON LOW CYCLE FATIGUE BEHAVIOR IN 8090 Al-Li ALLOY
Ai Suohua1 ;Wang Zhongguang1 ;Zhang Yun1;Han; Xinglin 2;Wu Yaqiao2

1.State Key Laboratory of Fatigue and Fracture for Materials  Institute of Metal Research  Academia Sinica Shenyang 110015
2.Shenyang Industrial University Shenyang 110023

Abstract:Low cycle fatigue(LCF) tests under different total strain amplitudes have been conducted in four aging conditions of 8090 Al-Li alloy. It was found that the cyclic stress response and the LCF lifetime of the alloy varied with the aging conditions and strain amplitudes. The cyclic stress-strain behaviour and fracture mode of Al-Li alloy are closely related to an increasing in the dislocation density, dislocation-dislocation interactions and interactions between the precipitates with dislocations.

 

Key words: low cycle fatigue cyclic hardening precipilate phase

ISSN 1672-7029
CN 43-1423/U

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