Evaluation of Laser Beam Welding Process using Mechanical Testing Method

The main objective of this review is to study the laser welding. During this study the properties of laser is used to weld received similar martensitic and dissimilar austenitic/ ferrous stainless steels in overlap and fillet joint configurations respectively. The influence of various operating parameters such as laser power, welding speed, fiber diameter, angle of incidence, and the defocus distance, and their interactions on the weld bead geometry and mechanical properties are examined. Effects of energy density and line energy, two key process parameters from energy perspective, on the weld bead characteristics are also investigated to understand certain energy dependent welding phenomena, and to show their consequent impact on the aforesaid factors. Moreover, formation of solidification microstructures and the distribution pattern of the segregated alloying elements in the weld with varied energy input are studied and correlated with the corresponding change in local hardness.