Abstract
Investigation of temperature distribution of submerged arc welded plates is essential while designing submerged arc welding joint because the key parameter for the change of weld bead geometry dimension, thermal stress, residual stress, tensile stress, hardness, and so forth is heat input, and heat input is the function of temperature distribution of GMAW process. An attempt is made in this paper to find out the exact solution of the thermal field induced in a semi‐infinite body by a moving heat source with Gaussian distribution by selecting appropriate inside volume for submerged arc welding process. It has been revealed that for GMAW, best suitable heat source shape is a combination of semispherical and semioval.
Highlights
An attempt of development of mathematical model of travelling heat source was made more than fifty years ago
Nguyen et al 2 presented an analytical solution of transient temperature distribution of a semi-infinite body subjected to three dimensional heat density of semiellipsoidal and double ellipsoidal mobile heat source
An attempt is made in this paper to find out the approximate analytical solution of the thermal field induced in a semi infinite body by a moving heat source with
Summary
An attempt of development of mathematical model of travelling heat source was made more than fifty years ago. Nguyen et al 2 presented an analytical solution of transient temperature distribution of a semi-infinite body subjected to three dimensional heat density of semiellipsoidal and double ellipsoidal mobile heat source. Nguyen et al 4 again described an approximate analytical solution for double ellipsoidal heat source in finite thick plates. Ghosh et al 8 investigated heat source shape for submerged arc welding process, but their investigation till near about 10% error in prediction of transient temperature distribution was found. In this analysis, an attempt is made in this paper to find out the approximate analytical solution of the thermal field induced in a semi infinite body by a moving heat source with. Gaussian heat distribution by selecting inside volume of combined spherical and oval shape for GMAW process
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