飞机用高强度铝合金腐蚀疲劳研究进展

摘要

Corrosion fatigue is a necessary stage for the high strength aluminum alloy of aircraft in service,and it is the key to assess the life and reliability of aircraft structure.The development process of high strength aluminum alloy of aircraft was briefly introduced here.Meanwhile the important factor and key technology on environment simulation for corrosion fatigue were analyzed.The corrosion fatigue crack initiation mechanism model and extension mechanism model of high strength aluminum alloy were summarized.The difficult and emphatic point on corrosion fatigue in future research was pointed out scientifically.This is the basis for corrosion fatigue of high strength aluminum alloy to carry out the test,explore the mechanism and apply on engineering.%腐蚀疲劳是飞机用高强度铝合金在服役过程中必然经历的阶段,亦是飞机结构寿命及可靠性评估的重中之重.简要介绍了飞机用高强度铝合金近年的发展历程,分析了高强度铝合金腐蚀疲劳的重要影响因素及环境模拟技术,归纳了高强度铝合金腐蚀疲劳裂纹萌生机理及扩展机制模型,指出了高强度铝合金腐蚀疲劳在未来研究中的重点、难点问题,为高强度铝合金腐蚀疲劳的试验开展、机理探索和工程应用奠定了基础.