Laser Welding of Steel Laminates: Measurement of Elastic Modulus with Three-point Bending

Laser welding offers considerable advantages over the conventional welding techniques such as precision of operation, high speed welding, and small heat affected zone. Laser welding also provide improved mechanical and metallurgical properties of the weld section, due to localized high intensity heating, as compared to those produced by the conventional techniques. Although the process is fast, the high cooling rates may results in hot spots in the weld section, especially when oxide compounds are presents. In this case, the release of oxygen and other carbonic gases in the weld section are responsible for the formation of the hot spots in this region. Consequently, it is necessary to investigate into some of the mechanical properties, such as the elastic modulus and hardness, of the weld sections. In the present study. laser welding of steel sheets is carries out at different combinations of laser welding parameters. The elastic modulus of the weld section is obtained through the thre