Laser Treated Lines Overlapping on Surface Modification of 304 Stainless Steel

Laser pulse overlapping (lpo) is an important factor affect the behavior of the laser treated surfaces. for laser surface treatment especially at high fluences, the laser beam must be focused to reach the desired fluence. then laser beam or sample scanning in 2 directions is done to treat a surface area. in this paper, effect of the distance between laser treated lines (scanned in x direction) on the surface properties including morphological changes and wettability modifications of 304 stainless steel is investigated. the results show that the morphology and chemistry of the surface are influenced effectively by changing the overlap between laser treated line on the surface. then, it should be considered as an important parameter in laser modification of a large surface with focused laser beam.