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Analysis of Dissimilar Metal Welding of 1020 Mild Steel and 304 Stainless Steel


Prasath. P , Mahendra Engineering College, Namakkal-637503; R.PRABU, Mahendra Engineering College, Namakkal-637503


Dissimilar welding; Stress corrosion cracking; Thermal stress; Residual stress


Joining of dissimilar metals has found its use extensively in power generation, electronic, nuclear reactors, petrochemical and chemical industries mainly to get tailor-made properties in a component and reduction in weight. However efficient welding of dissimilar metals has posed a major challenge due to difference in thermo- mechanical and chemical properties of the materials to be joined under a common welding condition. This causes a steep gradient of the thermo-mechanical properties along the weld. A variety of problems come up in dissimilar welding like cracking, large weld residual stresses, migration of atoms during welding causing stress concentration on one side of the weld, compressive and tensile thermal stresses, stress corrosion cracking, etc. Weld residual stress and thermal stress have been analysed for dissimilar metal welding of 304 stainless steel to 1020 mild steel taking 302 stainless steel as the filler metal. Similarly taking strain developed as an index the susceptibility of the welded joint to stress corrosion cracking have been studied. It is found that when the filler metal is replaced by Inconel 625 significant improvement is obtained in the welded joint in terms of reduction in stress developed and stress corrosion cracking. Also the problem of carbon migration is eliminated by the use of Inconel 625 as a weld filler metal due to the resistance of nickel-based alloys to any carbon diffusion through them.

Other Details

Paper ID: IJSRDV7I120303
Published in: Volume : 7, Issue : 12
Publication Date: 01/03/2020
Page(s): 126-128

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