激光局部表面改性对疲劳裂纹萌生抗力的影响

Fatigue crack initiation resistance improvement by means of laser partial surface modification

研究无搭接激光单道扫描方式对材料局部应力集中部位进行表面改性及其对疲劳裂纹萌生抗力的影响。探讨了不同改性工艺条件下疲劳裂纹萌生的方式和断裂的微观机制。

Using one pass method the areas of partial stress concentration were laser-modified and the influence on fatigue crack initiation resistance was investigated. The fatigue crack initiation patterns and fatigue fracture mechanism were also discussed at different laser parameters.