一、前言 喷丸强化工艺是用来提高金属零件疲劳和应力腐蚀断裂抗力的行之有效的工艺。因为它具有其它表面强化工艺无可比拟的优点,所以近年来在国内外,特别是航空工业中获得了迅速的发展。 有关喷丸强化对铝合金疲劳强度影响的研究指出,喷丸虽然能够改善疲劳S-N曲线高应力区的疲劳强度,但在疲劳强度极限附近,没有明显的效果。此外,近年来虽 First, the foreword Shot peening process is used to improve the fatigue of metal parts and stress corrosion cracking resistance of the effective technology. Because of its incomparable merits of other surface strengthening technology, it has gained rapid development in recent years at home and abroad, especially in the aviation industry. The study on the effect of shot peening on the fatigue strength of aluminum alloy points out that although shot peening can improve the fatigue strength of high-stress zone of fatigue S-N curve, there is no obvious effect near the fatigue strength limit. In addition, although in recent years