Evaluation Of Mechanical Properties Of Dissimilar Metal Tube Welded Joints Using Inert Gas Welding
نویسنده
چکیده
Evaluation of welding process such as metal inert gas welding and tungsten inert gas arc welding on tensile, bend and hardness properties of austenitic stainless steel SS347H(18Cr 10Ni 1Cb ), T22(21⁄4Cr Mo) and T91(9Cr 1Mo V) grades are studied. Tubes of 54 mm of outer diameter and 4 mm of wall thickness is used as a base material in the following combination SS347H VS T91 and T91 VS T22 is welded using both GMAW and GTAW. Tensile, impact, and hardness properties of the welded joints have been evaluated in both types of welding and the results are compared. The joints fabricated by GTAW joints exhibited higher strength value and enhancement in strength value is approximately 21% compared to GMAW joints. Very low hardness is recorded in the GMAW joints and maximum hardness is recorded in the GTAW joints. Various defects occurring in the welded joints are analyzed using Non destructive testing by Real time radiography method.
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