Microstructure and Mechanical Property Changes During TIG Welding of 31000-H2 (IS-737) Aluminium Alloy
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 6
Abstract
Welding, as one of the most effective joining methods for metals, has been extensively applied in engineering usage since a long time. The determination of microstructure and mechanical properties of welded structures is thus of paramount importance to implement a damage tolerant approach to structural life extension. In this study, structural and mechanical properties evaluation of 31000-H2 (IS-737) Aluminium Alloy after single pass Tungsten Inert Gas (TIG) welding were investigated to reveal the yield strength, ultimate strength, percentage elongation, impact strength and hardness of welded joints. The TIG Welding results of aluminium alloys 31000-H2 for 5 mm plate thickness using different filler materials during welding are presented in this paper. Effect of welding was studied on four different zones like base Metal, weld metal heat affected zone and combined zone of base Metal and heat affected zone. Welded specimens were investigated using scanning electron microscopy (SEM), UTM and Rockwell micro-hardness tester. Scanning electron microscopy was used to characterize transition sites of welded zone, HAZ, base metal and combined zone of base Metal and heat affected zone. Tensile test was conducted to characterize weld strength by determining ultimate tensile strength and micro-hardness test was conducted to characterize the homogeneity of welding in terms of mechanical properties.
Authors and Affiliations
Rajiv Suman, Dr. P. C. Gope
Keywords
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