Microstructural and Mechanical Characterization of as Weld and Aged Conditions of AA2219 Aluminium Alloy by Gas Tungsten Arc Welding Process
- 10 Downloads
In this article, Welding of AA2219 aluminium alloy using Gas tungsten arc welding process (GTAW) and evaluation of metallurgical, mechanical and corrosion properties of the joints are discussed. The weld samples were subjected to ageing process at the temperature range of 195°C for a period of 5 h to improve the properties. AA2219 aluminium plates of thickness of 25 mm were welded using gas tungsten arc welding (GTAW) process in double V butt joint configuration. The input parameters considered in this work are welding current, voltage and welding speed. Tensile strength and hardness were measured as performance characteristics. The variation in the properties were justified with the help of microstructures. The same procedures were repeated for post weld heat treated samples and a comparison was made between as weld condition and age treated conditions. The post weld heat samples had better tensile strength and hardness values on comparing with the as weld samples. Fracture surface obtained from the tensile tested specimen revealed ductile mode of failure.
KeywordsAA2219 aluminum alloy GTAW ageing microstructure tensile property hardness fractography
Unable to display preview. Download preview PDF.
- 3.Koreswara Rao, S.R., Madhusudhan Reddy, G., Srinivasa Rao, K., Srinivasa Rao, P., Kamaraj, M., and Prasad, Rao, K., Gas tungsten arc welded AA2219 alloy using scandium containing fillers-mechanical and corrosion behavior, Trans. Ind. Inst. Met., 2004, vol. 57, no. 5, pp. 451–459.Google Scholar
- 11.Bondarev, A.A., Electron beam welding of an Al–Cu–Mn alloy, Avtosvarka, 1974, vol. 2, no. 1, pp. 23–26.Google Scholar
- 13.Rao, S.R., Madhusudhana Reddy, G., Srinivasa Rao, K., Kamaraj, M., and Prasad Rao, K., Reasons for superior mechanical and corrosion properties of 2219 aluminium alloy electron beam welds, Mater. Charact., 2005, vol. 55, nos. 4–5, pp. 345–354.Google Scholar
- 16.Garland, J.G., Weld pool solidification control, Brit. Weld. J., 1974, vol. 22, pp. 121–127.Google Scholar
- 19.Kou, S. and Le Y., Dendrite morphology in aluminium alloy welds, Metal. Trans., 1983, vol. 14 A, no. 2, pp. 2243–2249.Google Scholar
- 21.Dieter, G.E., Mechanical Metallurgy, New York: McGraw Hill, 1988.Google Scholar
- 22.Standard Test Methods for Tension Testing of Metallic Materials, ASTM E8/E8M-11, ASTM International.Google Scholar