航空高强度铝合金残余应力的抑制与消除

从残余应力的产生和释放两个方面 ,讨论了抑制与消除铝合金中残余应力的若干技术与方法。首先 ,从尽量减少残余应力的产生又兼顾获得所需机械性能的角度 ,分析了采用热水淬火、喷雾淬火及有机介质淬火等淬火工艺。其次讨论了消除铝合金中残余应力的若干技术方法的特点、效果与适用场合 ,并指出在铝合金结构件淬火后的不稳定状态进行残余应力消除处理效果最佳

Control and relief of residual stresses in high-strength aluminum alloy parts for aerospace industry

Residual stresses of a very significant level were introduced when aluminum alloy parts were quenched in cold water from the temperature of solution treatment Residual stresses cause not only distortion and cracking, but also enhance susceptibility to stress corrosion cracking (SCC) and lead to premature failure The aim of this research is how to control and relieve residual stresses in high strength aluminum alloy parts First, various quenching processes have been evaluated in an attempt to combine low residual stresses with the required levels of mechanical properties during solid solution, involving quenching into boiling water, spray quenching and polymer glycol quenchants The second part of this paper is focused on the comparison of different stress relieving techniques, highlighting their key attributes, specific advantages and limitations Moreover, the paper concludes that all stress relieving techniques should be carried out immediately after being quenched in the solution treatment