INFLUENCE OF AGING ON LOW CYCLE FATIGUE BEHAVIOR IN 8090 Al-Li ALLOY

来源期刊：中国有色金属学报(英文版)1995年第1期

论文作者：Ai Suohua Wang Zhongguang Zhang Yun Han Xinglin Wu Yaqiao

文章页码：80 - 83

Key words：low cycle fatigue; cyclic hardening; precipilate phase

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.