Modeling, Prediction and Validation of Thermal Cycles, Residual Stresses and Distortion in Type 316 LN Stainless Steel Weld Joint made by TIG Welding Process

Abstract

In this research work, Finite Element Modeling (FEM) using SYSWELD was carried out to predict thermal cycles, residual stresses and distortion in type 316 LN stainless steel weld joint made by TIG welding process. The numerically predicted thermal cycles and temperature distribution were validated using Infrared (IR) Thermography. The model predictions of the surface and bulk residual stress profiles were validated using X-ray Diffraction (XRD) and Ultrasonic Testing (UT) respectively. Distortion analysis was also performed and validated using digital height gauge measurement. IR thermography was found to be a good tool for validating the model predictions of the temperature distribution in the weld joint. There was good agreement between the model predictions and the experimentally observed values of temperature, residual stresses and distortion. Therefore, the numerical modeling in combination with non-destructive methods provides an efficient approach for predicting the effect of welding process on the weld attributes.

Analysis of the Effect of Tungsten Inert Gas Welding Sequences on Residual Stress and Distortion of CFETR Vacuum Vessel Using Finite Element Simulations

“…In recent years, some studies have been carried out to predict and reduce the welding residual stresses and distortions using finite element models [6][7][8][9][10][11][12]. Bonakdar et al [13] predicted the level of residual stresses, as well as distortions of the electron beam welded shrouds of Inconel-713LC gas turbine blades using finite element simulations.…”

Nominal Stress-Based Equal-Fatigue-Bearing-Capacity Design of under-matched HSLA Steel Butt-welded Joints

“…As different fatigue crack initiation sites of heterogeneous structure show disparate fatigue crack propagation paths. Meanwhile, the fatigue crack growth rate and the critical crack propagation size are material-related physical quantities [18,19], which is proved by various fatigue limit assessment techniques [20][21][22][23][24][25][26]. Consequently, changes in the geometric proportions of the constituent materials on the fatigue crack propagation path will directly affect the maximum fatigue bearing capacity of the heterogeneous material.…”

Thermographic assessment of thermal cycle influence in structure and properties of the 4430V steel

“…In the paper descriptors taking into consideration temperature distribution in the heat affected zone, were used to assess properties and microstructure of the 4330V steel in the result of simulated thermal cycles application [1,2].…”