Analysis of thermal stresses and its effect in the multipass welding process of SS316L

Abstract

In this work, simulation has been carried out for multipass Gas tungsten Arc Welding of SS316L and their effects were studied for thermal, and residual stresses and compared with experimental results. The sequentially coupled thermo-mechanical, transient thermal and static structural analysis was modelled using ANSYS with relevant Ansys Parametric Design Language coding. Infrared thermography camera was used to obtain the real time temperatures during the welding. The effect of temperatures and the induced residual stresses of the weldment is measured with X-Ray diffraction technique. Tensile residual stresses have been identified at fusion zone and compressive stresses at heat affected zone. Pass wise temperature measurements were taken from analysis and experiment the agreement with 7.24%. The agreement of measured and analysed residual stress had an agreement with 16.66%.

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

“…Figure 13 shows the residual stress distribution measured on the top and bottom surfaces of the final weldments. Tensile residual stresses [34][35][36][37][38][39][40] were found throughout the plate. Mshaped stress distribution profiles are observed for weld 1 and weld 3 according to the literature [33].…”

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

“…With the increase of 0.09 kJ/ mm heat input, the stresses in increasing trend of 9 MPa were found in trail-1 to trail-2. Whereas from trail-2 to trail-3, it was about 0.16 kJ/mm difference in heat input, but the residual stresses are increased in tensile of about 22 MPa [21][22][23][24]. Based on authors' experience, in order to minimize the increasing linear trend of welding residual stresses, it is recommended that first pass be carried out with a higher weld current compared to that used for the remaining passes.…”

Evaluation of residual stresses in CO2 laser beam welding of SS316L weldments using FEA

“…However, implementing laser beam welding poses obstacles such as optimising process parameters, experimental setup and handling, and high expenses. Prior to the trials, simulation approaches employing Finite Element Analysis (FEA) are used to predict the heat input and optimise the weld process [2]. Similar materials connecting reduces component weight and cost, which is required in industries including nuclear, car, aerospace, power plants, and chemical plants.…”