A Review on Metal Inert Gas Welding of Dissimilar Steels

Dirisala Venkatratnam; V.V.S. Kesava Rao

Abstract

Joining of dissimilar metals has found its use extensively in power generation, electronic, nuclear reactors, petrochemical and chemical industries due to environmental concerns, energy saving, high performance, cost saving and so on. However efficient welding of dissimilar metals has posed a major challenge due to difference in thermal, mechanical and chemical properties of the materials to be joined under a common welding condition. This causes a steep gradient of the 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 stresses, stress corrosion cracking, etc. In the present work dissimilar joints of steel and its alloys joined using MIG welding are studied, in order to identify the gaps in works carried out by the earlier researcher’s.

Abstract

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