Effect of Filler Metals on Microstructure and Mechanical Properties of GTAW Welded Joints of Aluminum Alloy (AA2024-T3)
Engineering and Technology Journal,
2020, Volume 38, Issue 8, Pages 1236-1245
AbstractThis study presents an appropriate filler metal or welding electrode to join aluminum alloy (AA2024-T3) sheet of 3.2 mm thickness with a square butt joint using Gas Tungsten Arc Welding (GTAW) process. This process was carried out at three different welding currents with three various filler metals: ER4047 (12% Si), ER4043 (5% Si), and ER5356 (5% Mg). Experiments were conducted to investigate the microstructure and the mechanical properties. The effect of various filler metals upon the weld joints quality were analyzed via an X-ray radiographic and tensile test. Hardness test, microstructures, SEM, and XRD also conducted to the welded specimens. It was found that the best result was at 100 Ampere with using filler metal (ER5356) which produced the highest strength of 240 MPa in comparison with welded joints with utilizing fillers (ER4043) and (ER4047) having values of 235 MPa and 225 MPa, correspondingly. The hardness results showed that the highest hardness values were at the weld metal for ER4047 and ER4043, then decreased to HAZ and increased in the base metal. While in the case of ER5356, the highest hardness was in HAZ and decreased in the weld metal. The fractography of the fracture surface of the welded joints after the tensile test was analyzed using SEM
 V.A. Mosneaga, T. Mizutani, T. Kobayashi and H. Toda, “Impact toughness of weldments in Al–Mg–Si alloys”, Materials Transactions. Vol.43,No.6, pp.1381 – 1389, 2002.
 M. Ishak, L.H. Shah, I.S.R. Aisha, W. Hafizi and M.R. Islam, “Study of resistance spot welding between AISI 301 stainless steel and AISI 1020 carbon steel dissimilar alloys”, Journal of Mechanical Engineering and Sciences, Vol.6,No.1, pp.793-806, 2014.
 N. Karunakaran, “Effect of pulsed current on temperature distribution and characteristics of GTA welded magnesium alloy”, IOSR Journal of Mechanical and Civil Engineering, Vol. 4, No.6, pp.1-8, 2013.
 J. M. Fortain and S. Gadrey, “How to select a suitable shielding gas to improve the performance of MIG and TIG welding of aluminum alloys”, Welding International, Vol.7, No.12, pp.936-947, 2013.
 B. S. Yigezu, D. Venkateswarlu, M. M. Mahapatra, P. K. Jha, and N. R. Mandal, “On friction stir butt welding of Al +12Si/10 wt% TiC in situ composite”, Materials and Design. Vol.54, pp.1019-1027, 2014.
 H. Aydın, A. Bayram, A. Uguz, and K. S. Akay, “Tensile properties of friction stir welded joints of 2024 aluminum alloys in different heat-treated state”, Materials and Design, Vol.30, pp. 2211-2221, 2009.
 A. Kumar and S. Sundarrajan, “Optimization of pulsed TIG welding process parameters on mechanical properties of AA 5456 aluminum alloy weldments”, Journals of Science Direct (SP), Vol.30, pp.188-1297, 2008.
 Liu Xu-hel, Gu Shi-hai1, Wu Rui-zhi, Leng Xue-song, Yan Jiu-chun and Zhang Mi-li, “Microstructure and mechanical properties of Mg-Li alloy after TIG welding”, Journals of Science Direct (SP), pp.477-481, 2011.
 L. Singh, “An Evaluation of TIG welding parametric influence on tensile strength of 5083 aluminum alloy”, International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, Vol. 7, pp.1262-1265, 2013.
 C.H. Muralimohan, S. Haribabu, Y.H. Reddy, V. Muthupandi, and K. Sivaprasad, “Joining of AISI 1040 steel to 6082-T6 aluminum alloy by friction welding”, Journal of Advances in Mechanical Engineering and Science, Vol.1, No.1, pp.57-64, 2015.
 R. P. Matrukanitz, “Selection and weldability of heat-treatable aluminum alloys”, ASM Handbook-Welding, Brazing and Soldering, Ohio: ASM International, Vol. 6, 1990.
 Indira Rani, “Effect of Pulsed current TIG welding parameters on mechanical properties of J-joint strength of AA6351”, The International Journal of Engineering and Science (IJES), Vol.1, No.1, pp. 2319-1805, 2012.
 S. Gurjinder, K. Sunil and S. Amrik, “Influence of current on microstructure and hardness of butt welding aluminum AA6082 using GTAW process”, International Journal of Research in Mechanical Engineering & Technology International (IJRMET) Vol. 3, Issue 2, pp.143-146, 2013.
 D. Krishnaja, D. Venkateswarlu, C. Muralimohan and B. K. Kumar, “Analysis of the influence of friction stir processing on gas tungsten Arc welding of 2024 aluminum alloy weld zone”, Vol. 8, No.1, pp. 243-252, 2018.
 ASM Handbook, “Properties and selection: nonferrous alloys and special-purpose materials”, American society for Metals, Vol. 2, pp.1328, 1990.
 “Standard test methods for tension testing of metallic materials”, ASTM E-8, American Association State, 2010.
 M. K. Abbass and H. H. Abd, “A comparison study of mechanical properties between friction stir welding and TIG welded joints of aluminum alloy (Al 6061-T6)”, Engineering and Technology Journal. Vol. 31, No.14, pp. 2701-2715, 2013.
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