• CH.Divya Bharathi
• CH.Neeraja

In this study, standard fusion fastening processes: MIG, TIG and solid state method friction stir fastening (FSW) were applied to six millimeter thick plates of aluminimum alloy. The weldments were evaluated by playing small structural examinations together with optical microscope and scanning microscope (SEM) and moreover as hardness measurements. Mechanical testing has been done by suggests that of tensile and bend tests. The mechanical properties and small structural options of atomic number 13 (Al5052) weldments processed by gas atomic number 74arc fastening (GTAW) and gas metal arc welding (GMAW) and friction stir welding are investigated. Weldments processed by each strategies are mechanically softer than the parent material Al5052, and will be potential sites for plastic localization. The microstructure of the welds, together with the lump zone and warmth affected zone, has been compared in these 3 strategies exploitation optical research. The mechanical properties of the weld are have additionally been investigated exploitation hardness and tensile tests. it's revealed that Al weldments processed by GTAW are mechanical additional reliable than those by GMAW. the previous bears higher strength, additional plasticity, and no apparent microstructure defects. Perceivable consistence in weldments by GMAW is found, that might account for the distinct mechanical properties between weldments processed by GTAW and GMAW. it's instructed that caution ought to be exercised once exploitation GMAW for Al3003 within the high-speed-train trade wherever such lightweightweight metal is broadly used. but fused samples have additional strength than that of MIG welded samples. The weld metal microstructure of MIG welded specimen contains equiaxed dendrites as a results of set process throughout MIG welding whereas FSWed specimen have formed microstructure.

IndexTerms - Tungsten inert gas welding, metal inert gas welding, friction stir welding, aluminimum alloy5052, mechanical properties microstructures.

"MICROSTRUCTURE CHARACTERISTICS AND MECHANICAL PROPERTIES OF ALUMINIUM ALLOY WELDED JOINTS USING GAS TUNGSTEN ARC WELDING ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.262-266, June 2019, Available :http://www.jetir.org/papers/JETIR1906T32.pdf

"MICROSTRUCTURE CHARACTERISTICS AND MECHANICAL PROPERTIES OF ALUMINIUM ALLOY WELDED JOINTS USING GAS TUNGSTEN ARC WELDING ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp262-266, June 2019, Available at : http://www.jetir.org/papers/JETIR1906T32.pdf