In addition, the macro cyclic stabilization behavior of 7075 RRA alloy was explained using the cyclic micro softening/hardening competitive mechanism.

• 讨论了应变疲劳位错结构与累积形变之间的关系，进而初步分析了疲劳裂纹的萌生机理，并用循环显微软化/硬化的竞争机制解释了7075?RRA铝合金的宏观循环稳定化行为。