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.