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Journal of Applied Sciences
  Year: 2012 | Volume: 12 | Issue: 10 | Page No.: 1053-1057
DOI: 10.3923/jas.2012.1053.1057
 
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Effect of Ageing on Mechanical Properties of Dissimilar Friction Stir Welded Aluminum Alloy (AA2024 and AA6351) Joints

P. Murali Krishna, D. Simhachalam and N. Ramanaiah

Abstract:
As a solid-state process, Friction Stir Welding (FSW) and Friction Welding (FW), can avoid the formation of solidification cracking and porosity associated with fusion welding processes and significantly improve the weld properties of aluminum alloys. Many studies on the mechanical properties of solid state welding joints of heat-treatable aluminum alloys have indicated that solid state welding gives rise to softening of the joints and results in the significant degradation of the mechanical properties. In order to restore the mechanical properties of the FSW joints, a post-weld ageing heat treatment to aluminum alloy joints has been preferred. In this article, an attempt has been made on post-weld solution treating and ageing (PWSTA) to friction stir welded dissimilar aluminum alloys (AA2024 and AA6351). In addition, effect of PWSTA on microstructure and mechanical properties of the welds have been studied. Optical microscopy was carried out to study the micro structural changes. Hardness and tensile strength testing were conducted to study mechanical behavior. The PWSTA applied to the joints is found to be beneficial to enhance the mechanical properties of the welded joints. As such, the mechanical properties of PWSTA welded joints shows better than the welded joints.
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How to cite this article:

P. Murali Krishna, D. Simhachalam and N. Ramanaiah, 2012. Effect of Ageing on Mechanical Properties of Dissimilar Friction Stir Welded Aluminum Alloy (AA2024 and AA6351) Joints. Journal of Applied Sciences, 12: 1053-1057.

DOI: 10.3923/jas.2012.1053.1057

URL: https://scialert.net/abstract/?doi=jas.2012.1053.1057

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