Picosecond laser shock peening of base Nimonic 263 material and laser welded Nimonic 263 alloy

Abstract

Laser welding is a welding process with a high energy density and numerous advantages over conventional welding methods (narrow heat-affected zone, lower heat input, less distortion, and the like.) Mechanical treatment laser is an innovative technique for improving the properties of fatigue resistance, abrasion, and corrosion resistance. In this paper, mechanically processed by laser two groups of samples; base materials and laser welded joints. Sheets made of Ni superalloy 2 mm thick were made with a millisecond Nd:YAG laser, while the mechanical treatment was made with a picosecond Nd:YAG laser. Welds are tensile tested, and microstructure was observed by optical and scanning electron microscopy. The microhardness was measured by the Vickers method with a load of 10 N.