Effect of Residual Stresses of GTA Welding for Dissimilar Materials

Abstract

The purpose of the present work is to understand the evolution of residual stresses in weldments. The study made to weld the multipass dissimilar of Nickel-based superalloy Inconel 625 and stainless steel 316L using Continuous Current Gas Tungsten Arc Welding (CCGTAW) and Pulsed Current Gas Tungsten Arc Welding (PCGTAW) process employing ERNiCrMo-3 and ERNiCr-3 fillers. The L 4 orthogonal array was used in the present experimentation process. Analysis of Variance (ANOVA) is applied for the optimization and to identify the critical parameters. In welding process, the size of the lattice size will be stressed due to welding parameters; the lattice dimension is measured by non-destructive technique X-Ray diffraction to investigate residual stress in the weldment in the lateral surface of the plate. X-Ray Radiography test has evaluated the quality of welds. The results show that root gap is a critical parameter and filler wire and weld processes are not critical.

Effect of Heat Input on Distortions and Residual Stresses Induced by Gas Tungsten Arc Welding in SS 316L to INCONEL625 Multipass Dissimilar Welded Joints

“…e root gap was about 2.0 mm (Table 2), while the voltage was maintained at a constant value of 12 volt for all the trials. e interpass temperature was about 200-250 °C [15,17] to avoid hot cracking during the welding process.…”

“…A welding numerical model was developed by Vemanaboina et al [14,15] to study the temperature distribution during the process and residual stresses in the weldments produced by GTAW [14] and in multipass dissimilar welding (IN625/SS316L) [15]. In this last work, both constant and pulsed current GTAW processes along with ERNiCrMo-3 and ERNiCr-3 filler rods were used.…”

Effect of Plasma Arc Welding on Residual Stress and Distortion of Thin Titanium Sheet

“…The classical Arrhenius term is utilized to incorporate the temperature dependency. Garofalo proposed a steady state plastic flow model by considering hyperbolic sine function because most of the metal strain rate is not proportional to the stress exponent form at high stress region [33][34] . The hyperbolic function in the equation is accounting the stress and state dependency.…”

Thermal and Residual Stress Distributions in Inconel 625 Butt‐Welded Plates: Simulation and Experimental Validation

“…Finally, the influence of the 3D model size on the temperature, residual stress, and displacement distributions was investigated. Vemanaboina et al [5] studied the residual stress evolutions in multi-pass dissimilar joints (IN 625-AISI 316L). e L 4 orthogonal array was chosen for the tests.…”