Experimental Analysis on the Mechanical Properties of Dissimilar Material Joint During PCTIG Welding
During TIG welding on dissimilar joint weldment between copper and brass, reduced mechanical strength is observed. To overcome these challenges, pulsed current tungsten inert gas (PCTIG) welding technique has been employed. Experimental investigations were carried out using TIG welding and PCTIG welding with AC and DC currents on dissimilar joints of copper and brass and mechanical properties such as microhardness were compared. AC-PCTIG with 5 Hz resulted in improved microhardness of 92.66 Hv on weld zone. DC-PCTIG with 100 Hz resulted in microhardness of 107.5 Hv on the weld zone. Mixed-mode current consisting of half-cycle of AC current and another half-cycle of DCEN mode was also carried out on PCTIG welding. Due to the influence of the DCEN current, the mechanical properties suffer reduction and weld strength lies between the AC and DCEN welded conditions.
KeywordsTIG welding PCTIG welding Dissimilar joints
- 1.Indira Rani M, Marpu RN (2012) Effect of pulsed current TIG welding parameters on mechanical properties of J-joint strength of Aa6351. Int J Eng Sci (IJES) 1(1):1–5Google Scholar
- 2.Pichumani S, Raghuraman S, Venkatraman R (2015) Correlation between microstructure and microhardness on Al-Sic composite welded using pulsed current TIG welding. ARPN J Eng Appl Sci 10(18):8141–8149Google Scholar