• Mr. Ashish Dattatray Sarolkar
• Dr. K. P. Kolhe

Among all the welding processes, the chief advantages in using Gas Tungsten arc welding (GTAW) for surfacing are high reliability, all position capability, ease of use, low cost and high productivity. Gas tungsten arc welding is one of the widely used techniques for joining aluminum alloy, nickel, nickel alloy, stainless steel, mild steel etc. To automate a welding process it is essential to establish the relationship between weld bead geometry and process parameters to control and predict weld bead quality. The main objective of this paper is to analyze the effect of welding process parameters such as welding current, voltage, welding speed and rate of heat input on weld bead geometry to weld AA 6082 (Parameters of weld bead geometry are weld bead width, bead penetration and bead height) and Microstructures of weld metal under different process parameter inputs are viewed and captured with an optical microscope coupled with an image analyzing software. Optical microscopic analysis has been done on the weld zone to evaluate the effect of welding parameters on welding quality and also Micro-hardness values of the fusion zone, heat affected zone, and base metal are measured for the welded specimens at the cross section to understand the change in mechanical property of the welded zone. AA6082 is an alloy of Al-Mg-Mn-Si which are employed in insulation foils, kitchenware, chemical and food industry, equipment containers, automotive trim, light reflectors, architecture, vessels, piping beer barrels and milk churns etc., due to their medium strength alloy with a very good corrosion resistance and also the grade 6082 aluminium offering the highest strength of all the 6000 series it is widely regarded as a material for structural type applications. Parameters of weld bead geometry are weld bead penetration, bead width, and bead height or reinforcement. It is essential to assess the effect of process parameters on specific bead geometry and shape relationships. The result of this study helps to apply control methods in forecasting the quality of weldments during Gas Tungsten Arc Welding. By using of this experimental study we will improve the productivity, quality of product and also efficiency of GTAW and we will reduce the expenditure money on the waste of material and maintenance.

Process parameters, micro hardness, microstructure, weld bead geometry, Gas Tungsten Arc Welding, AA6082 etc.

"EFFECT OF PROCESS PARAMETERS ON WELD BEAD GEOMETRY AND MICRO-HARDNESS OF WELDING AA 6082 USING GTAW PROCESS.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 10, page no.200-207, October-2017, Available :http://www.jetir.org/papers/JETIR1710030.pdf

"EFFECT OF PROCESS PARAMETERS ON WELD BEAD GEOMETRY AND MICRO-HARDNESS OF WELDING AA 6082 USING GTAW PROCESS.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 10, page no. pp200-207, October-2017, Available at : http://www.jetir.org/papers/JETIR1710030.pdf