The effect of pulsed Nd-YAG laser welding of AISI 304 to AISI 430 stainless steel was investigated. Laser parameters such as (peak power, pulse duration and welding speed) were changed and the change in properties was measured. Optical microscope was used to examine cracks, pores and weld geometry of welded samples. The results of tensile shear test for peak power, pulse duration and welding speed were 4.43 KN, 4.292 KN and 4.392 KN respectively. These values represent the best samples for each proposed parameter.
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