The results showed that the cyclic softening character with quasi?cleavage fatigue fracture for ZA27 alloy appeared while the cyclic hardening character with dimple and stripe fatigue fracture for ZCuSn10P1 alloy occured. ?

• 并对两种材料的疲劳试件断口进行了分析，结果表明：ZA27合金表现为循环软化，疲劳断口为准解理。 ZCuSn10P1表现为循环硬化，疲劳断口以韧窝和疲劳辉纹为主。