Different Surface Morphologies Formed on the Surface of Stainless Steel After Nd:YAG Pulsed Laser Irradiation
Chengyun Cui, Jiandong Hu, Yuhua Liu and Zuoxing Guo
The effects of laser surface irradiation on the surface morphologies of stainless steel were investigated. The surface temperature gradient and resolidification velocities in one laser spot have been estimated according to the numeral simulation of the thermal conditions. Different products can be formed on the surface of the stainless steel by the irradiation of the Nd:YAG pulsed laser. It was proved by the XRD that they were mainly consisted of γ -Fe, Cr2O3, Fe2O3, FeO and some manganese oxides. Scanning electron microscope (SEM) with an energy dispersive (EDS) analyzer was also used to identify the products on the stainless steel surface.
Keywords: Nd:YAG pulsed laser, stainless steel, Gaussian spot, different oxides, numeral simulation, XRD analysis.