Experimental investigation on similar and dissimilar welding of inconel 600 and aisi 316l using atig welding process

Abstract

Nowadays, most of the structural fabrications possess welded joints newlinethat are produced using suitable welding technique. However, the joining of newlinethick plates in a single pass welding is a cumbersome task to many fabricators. newlineLikewise, the selection of welding technique, filler wire and welding condition newlinefor the similar and dissimilar welding of several metals is at the development newlinestage. From the extensive literature review, the selection of base metals has been newlinemade based on their applications. Inconel 600, a nickel based super alloy that newlinehas widespread applications in the industries like chemical, aerospace, nuclear newlineand power plants. Similarly, AISI 316L, a low carbon grade austenitic stainless newlinesteel is used in the above-said applications. Both metals have superior corrosion newlineresistance and elevated temperature mechanical properties. newlineThe present investigation addresses the similar and dissimilar newlineweldability of Inconel 600 and AISI 316L metals. The optimization of Tungsten newlineInert Gas (TIG) welding parameters and selection of suitable activating flux for newlinethe single pass welding of selected candidate metals have been performed. newlineSimilar and dissimilar joints of aforementioned metals have been fabricated by newlineActivated-TIG (ATIG) welding process using compound flux of newline50 % SiO2 + 50 % TiO2. Macroscopic and Non-Destructive Testing (NDT) newlineresults revealed the soundness of fabricated weldments. Microscopic studies newlinedivulged that the segregation and deleterious phases in the weldments were newlinesuppressed or controlled while using this compound flux and welding method. newlineThe tensile test results of similar and dissimilar weldments newlinecorroborated that the weld failure occurred in the weld zone. So, Laser Shock newlinePeening (LSP) treatment was performed on the fabricated joints to enhance its newlinemechanical properties. After LSP, all weldments have failed far away from the newlineweld with higher mechanical properties.. newline newline