激光冲击处理提高铝合金疲劳性能的机理研究

Mechanism Researching of Laser Shock Processing Increasing the Fatigue Property of Aluminum Alloy

对激光冲击提高铝合金材料疲劳寿命的微观机理作了初步探讨。实验结果表明铝合金疲劳寿命提高的原因是位错的大量产生和残余压应力的存在。

According to the experimential results,the micro mechanism of Laser Shock Processing (LSP) increasing the fatigue property of aluminum alloy are researched preliminarily. And the experimential results are quantitativiy analysed. The producing of a large number of dislocations and the existing of residual compressive stress are believed to be the reasons of improvement of Al alloysfatigue life.