Phase based Study of Solidified Structures evolved during the TIG welding of 2219-T87 Aluminum Alloy

Authors

  • W. Ahmad Department of Metallurgy and Materials Engineering, University of Engineering and Technology, Lahore, Pakistan
  • G. H. Awan Department of Metallurgy and Materials Engineering, University of Engineering and Technology, Lahore, Pakistan
  • T. Ahmad Department of Metallurgy and Materials Engineering, CEET, University of the Punjab, Lahore
  • M. T. Z. Butt Department of Metallurgy and Materials Engineering, CEET, University of the Punjab, Lahore
  • L. A. Kasuri Department of Metallurgy and Materials Engineering, University of Engineering and Technology, Lahore, Pakistan
  • M. Kamran CEET, PU

Keywords:

Microstructure, TIG welding, Filler Alloys, Metallography, Scanning Electron microscopy

Abstract

Aluminum alloys particularly 2219 is being abundantly used in aerospace industry due to high strength to weight ratio and excellent weldability. After welding, the sudden reduction in mechanical properties of joint as compared to that of the parent metal is a serious issue in fabrication industry. In this research work, a comparative study has been made to investigate the dependence of mechanical properties on variation of filling material composition and resultant microstructure developed in a square butt joint of 2219 aluminum alloy plates welded by tungsten inert gas (TIG) welding process using different filler materials including ER-2319, ER-4043 and ER-5356. The variation in hardness and ultimate tensile strength values was correlated with the grain morphology, composition, morphology and volume of eutectic phase along the grain boundaries found in base metal (BM), heat affected zone (HAZ) and weld zone (WZ).It was observed that ER-2319 WZ gives better properties due to its compatible primary and eutectic phases. However ER-5356 WZ showed poor compatibility due to porosity formation and variation of microstructure within the WZ.

Author Biographies

W. Ahmad, Department of Metallurgy and Materials Engineering, University of Engineering and Technology, Lahore, Pakistan

M. Kamran, CEET, PU

AP

Additional Files

Published

2015-06-18

How to Cite

Ahmad, W., Awan, G. H., Ahmad, T., Butt, M. T. Z., Kasuri, L. A., & Kamran, M. (2015). Phase based Study of Solidified Structures evolved during the TIG welding of 2219-T87 Aluminum Alloy. Journal of the Pakistan Institute of Chemical Engineers, 43(2), 45–56. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/247