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Effect of post-weld heat treatment on dissimilar friction stir welded AA6063 and A319 aluminium alloys

  • M. Muthu Krishnan and K. Marimuthu
Published/Copyright: May 8, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 5

Abstract

The effects of post-weld heat treatment at a solution temperature of 540 °C for 5 hrs 30 mins followed by ageing at 190 °C for 6 hrs on microstructure and mechanical properties of friction stir welded dissimilar aluminium alloys A319 and AA6063 have been examined. Post-weld ageing results in improved mechanical properties. The effect of ageing on the morphology of the second phase particles of silicon, copper and iron in the stir zone has been studied. The hardness of the stir zone for both as-welded and post-weld ageing was found to be lower than that of AA6063 but higher than A319 base metal. Microstructural studies reveal that the A319 dominates the stir zone.

Keywords: Friction stir welding; Aluminium alloys; Post-weld heat treatment; Intermetallics; Mechanical properties
* Correspondence address, M. Muthu Krishnan, Assistant Professor, Department of Mechanical Engineering, Kalaignar Karunanidhi Institute of Technology, Coimbatore, Tamilnadu, India-641 402, Mobile: +91 9994761716, Tel.: 091 422 2367838, Fax: 091-0422-2579200, E-mail:

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Received: 2013-08-27
Accepted: 2014-01-20
Published Online: 2014-05-08
Published in Print: 2014-05-13

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111054
Keywords for this article
Friction stir welding; Aluminium alloys; Post-weld heat treatment; Intermetallics; Mechanical properties

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review
  4. Research trends in microwave dielectrics and factors affecting their properties: A review
  5. Original Contributions
  6. Efficiency and work performance of TiNi alloy undergoing B2 ↔ R martensitic transformation
  7. Fabrication of Gasar made from Cu-24 wt.% Mn alloy
  8. Effect of intermediate frequency electromagnetic field on the solidification structure and mechanical properties of direct chill cast Al-8 wt.%Si alloy
  9. Effect of Ni-based conversion coating and Ni–P electroless plating on the bonding process of pure Al and AZ31 alloy
  10. Effect of ball milling time on the synthesis of nanocrystalline merwinite via mechanical activation and heat treatment
  11. Structural and magnetic properties of Fe–Al2O3 soft magnetic composites prepared using the sol–gel method
  12. Improved dielectric performance of barium strontium titanate multilayered capacitor by means of pulsed laser deposition and slow injection sol–gel methods
  13. Effect of heat treatment on the slurry erosion resistance of high strength steel DP980
  14. Development of biomimetic gelatin–chitosan/hydroxyapatite nanocomposite via double diffusion method for biomedical applications
  15. Short Communications
  16. Effects of rolling rate on microstructure and mechanical properties of Mg sheets
  17. Effect of post-weld heat treatment on dissimilar friction stir welded AA6063 and A319 aluminium alloys
  18. Dielectric and magnetic properties of Ba0.8Sr0.2TiO3 – Y3Fe5O12 – YFeO3 composites
  19. Microwave-assisted modulated synthesis of zirconium-based metal–organic framework (Zr-MOF) for hydrogen storage applications
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