Experimental Investigation of Microstructure and Mechanical Properties of TIG Welded Aluminium Alloys
DOI:
https://doi.org/10.53555/nnmce.v2i3.340Keywords:
Aluminium alloy, TIG welding, Microstructure, Mechanical properties.Abstract
Aluminium and its alloys are used in fabrication because of their low weight, good corrosion resistance and weldability. Pure aluminium is soft and therefore not suitable for structures, which require strength. The Present investigation aims to compare the mechanical properties of non-heat treatable Aluminium alloy AA5083 and heat treatable. Aluminium alloy AA7020 using Tungsten Inert Gas welding. 5556A filler were used to weld AA7020 alloy and 5183A filler for AA5083 alloy. Effect of pulsing mode over conventional mode of GTA process were also investigated for AA5083 alloy. In this work, gas tungsten arc welding process has been selected because it is low heat input process. Low heat input process has selected because AA7020 and AA5083 were low melting point material. The alternating current (AC) power source has been selected because of better cleaning action and high heat concentration on the materials can be avoided. Mechanical testing like tensile test, impact test, bend and hardness test have been critically analysed and the properties were summarized and correlating with microstructure and SEM fractographs.
References
Gadewar, S., Swaminadhan, P. and Harkare, M. (2010), “Experimental investigations of weld characteristics for a Single pass TIG weldingwith Stainless steel”, Journal of Engineering and Technology, Vol.2, No.8, pp.3676-3686.
ZHOU, C.—YANG, X.—LUANET, G.: Scripta Materialia,53, 2005, p. 1187.
MATHERS, G.: The Welding of Aluminium and Its Alloys. Cambridge, Woodhead Publishing Limited 2002.
ANDERSON, T.: Welding Journal, 81, 2002, p. 77.
ANDERSON, T.: Welding Journal, 83, 2004, p. 28.
JOHNSEN, M. R.: Welding Journal, 78, 1999, p. 35.
KALLEE, S. W.—DA VENPORT, J.—NICHOLAS,E. D.: Welding Journal, 81, 2002, p. 47.
Lee JI, Um KW. A prediction of welding process parameters by prediction of back-bead geometry. J Mater Process Technol, 2000.
Raveendra J, Parmar RS. Mathematical models to predict weld bead geometry for flux cored arc welding. Met Construct, 1987.
Khanna, O.P. (2006), “A text book of welding technology”, Dhanpat Rai PublicationsLtd., pp.3
Minnick.and William, H. (1996), “Gas tungsten arc welding handbook”, Tinley Park, Illinois: Goodheart–Willcox Company, pp.71-73.
Li, L., Liu, Z. and Snow, M. (2006), “Effect of defects on fatigue strength of GTAW repaired cast aluminum alloy”, pp.1s-6s.
Welding Handbook (4th edition) section 2, “Gas, arc and resistance welding processes”, published by American Welding Society.
Sudhakaran, R., Vel, M. and Sivasakthivel, P. (2012), “Optimization of process parameters to minimize angular distortion in gas tungsten arc welded stainless steel grade plates”, Journal of Engineering Science and Technology, Vol.7, No.2, pp.195–208.
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