铝合金疲劳裂纹易沿粗大的杂质相粒子萌生,而合金的晶粒结构、晶界和晶粒取向、析出相等本征微观特征影响疲劳裂纹的扩展行为.从疲劳裂纹的萌生和扩展两方面较系统地分析了航空铝合金耐疲劳损伤性能与本征微结构之间的关系和作用机制以及最新的研究进展,并在此基础上提出了需要进一步研究的问题.
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