Estimation of Temperature and Residual Stress Distribution During Surface Modification Using Tungsten Inert Gas Arcing

Abstract

This work aims to examine the distribution of temperature and residual stress during surface modification of AISI8620 steel using tungsten inert gas (TIG) arcing. Utilizing the COMSOL software, a 3D finite element analysis is performed to determine the stress and thermal profile at each point of the entire sample. The experimental findings were utilized to determine the properties of the heat source, which was modelled using a double ellipsoid equation. During surface modification, highly localized heating followed by rapid cooling exposes the components to complicated thermal and mechanical loads and creates large residual stress fields, which may enhance the chance of time-dependent failure by encouraging crack initiation. The simulation program is run by coupling solid mechanics and heat transfer in solid. Peak temperature, cooling rate, temperature, and stress distribution along and transverse to the heat load are observed.