INFLUENCE OF GROOVE ANGLE ON STRENGTH AND DISTORTION OF J-GROOVE BUTT WELD JOINT

Welding, one of the most convenient and rapid method used for joining metals in navy, process industry in fabrication, maintenance, repair of parts and structures. The pipe used in process industry has welding strength as its important parameter. In this paper investigation of J-groove geometry to find out tensile and impact strength in case of butt weld joint will be done. For J-groove geometry different models of pipe with varying included angle from 150 , 220 , 300 , 400 will be made. Currently the V-groove geometry with included angle up to 450 is in use, after studying the Indian Welding Journal, Indian Welding Society it is observed that distortion and residual stresses increases with increase in groove angle and its strength also increases with groove angle increasing the weld material which affect the economy of welding. In this paper we aim at overcoming these disadvantages by making use of J-groove geometry as on comparison after studying different papers concludes that J-groove geometry has less residual stresses and distortion than V-groove geometry and also requires less weld materials. The industries facing the disadvantage with V-groove geometry can make use of the satisfactory results obtained from this project. Tensile test to check maximum tensile force sustaining capacity and micro and macro inspection test to check welding quality and other parameters has been conducted. Other tests carried out includes impact test to check maximum energy absorbing capacity, we also measured dimensions of specimen before and after welding to find out longitudinal and transverse distortion if any by making use of four specimens. Finally, an experimental result simulates with Finite Element Analysis results.