Abstract
Continuous wave diode pumped Nd:YAG laser was applied to weld AISI 316L Stainlesssteel. Butt joint sheets of 1.5 mm thickness and 30 mm width were joined together in a singlepass without using filler material. Design of experiment is applied to investigate the effects oflaser power and welding speed on penetration depth and mechanical properties (tensilestrength and microhardness). The depth of penetration is directly proportional to the laserpower and inversely proportional with the welding speed. Maximum penetration depth was753 μm. The tensile strength is directly proportional with the laser power. Maximum tensilestrength is 632 MPa. Ductile fracture is revealed by SEM analysis. The average value ofmicrohardness of the weld is 275 HV while the average of the base metal reached 225 HV,this is because of the presence of different phases in weld metal from base metal.
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