The Influence of Welding Heat Source Inclination on the Melted Zone Shape, Deformations and Stress State of Laser Welded T-Joints

Abstract

The paper concerns the numerical analysis of the influence for three different of welding heat source inclinations on the weld pool shape and mechanical properties of the resulting joint. Numerical analysis is based on the experimental tests of single-side welding of two sheets made of X5CrNi18-10 stainless steel. The joint is made using a laser welding heat source. Experimental test was performed for one heating source inclination. As a part of the work metallographic tests are performed on which the quality of obtained joints are determined. Numerical calculations are executed in Abaqus FEA. The same geometrical model is assumed as in the experiment. Material model takes into account changing with temperature thermophysical properties of austenitic steel. Modeling of the motion of heating source is performed in additional subroutine. The welding source parameters are assumed in accordance with the welding process parameters. Numerical calculations were performed for three different inclinations of the source. One inclination is consistent with experimental studies. The performed numerical calculations allowed to determine the temperature field, shape of welding pool as well as deformations and stress state in welded joint. The obtained results are compared to results of the experiment.

Analysis of X5CrNi18-10 (AISI 304) Steel Susceptibility to Hot Cracking in Welded Joints Based on Determining the Range of High-Temperature Brittleness and the Nil-Strength Temperature

“…The shape of the welding pool, as well as deformations and the stress state in the welded joint, have an impact on cracking. The finite element methods (FEMs) are helpful in analyzing the risk of crack formation [27].…”

Effect of Preheat Temperature and Welding Sequence on the Temperature Distribution and Residual Stress in the Weld Overlay Repair of Hydroturbine Runner

“…Therefore, the key point to be solved is how to properly regulate residual stress and deformation of the welded junction between the blade and the shroud to ensure the hydraulic turbine’s safe and stable operation. Many researchers have previously investigated residual stresses and deformations in thick plate butt welds [ 11 , 12 , 13 , 14 ], longitudinal welds [ 15 , 16 , 17 ], and dissimilar steels [ 18 , 19 , 20 ]. For example, the welding sequence had a substantial effect on the plate deformation and longitudinal stress distribution induced by welding [ 21 ], according to Chen et al Fallahi et al [ 22 ] discovered that preheating and proper welding sequences were effective in reducing residual stresses during welding.…”