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Analysis And Characterization Of Forming Behavior On Dissimilar Joints Of Aa5052-O To Aa6061-T6 Using Underwater Friction Stir Welding

Author

Listed:
  • K. TEJONADHA BABU

    (Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620 015, India)

  • S. MUTHUKUMARAN

    (Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620 015, India)

  • C. SATHIYA NARAYANAN

    (#x2020;Department of Production Engineering, National Institute of Technology, Tiruchirappalli 620 015, India)

  • C. H. BHARAT KUMAR

    (Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620 015, India)

Abstract

The effects of underwater friction stir welding (UFSW) on mechanical properties, strain hardening behavior, and formability of dissimilar materials of AA5052-O and AA6061-T6 welded joints were investigated. The mechanical properties of the UFSW joints exhibited higher strength and higher joint efficiency than the conventional friction stir welded joints (CFSW). The maximum joint efficiency of 73% has been attained for UFSW joints, which is due to the effect of welding atmosphere. The hardness of the stir zone (SZ) and heat affected zone (HAZ) are also obtained higher for the UFSW joints. Moreover, the hardening capacity, strain hardening exponent and formability of the UFSW joints were greatly improved over the CFSW joints. The improvement in mechanical properties of the UFSW joints is mainly due to faster cooling rate during welding. The microstructural characteristics revealed the formation of fine grains in the UFSW joints compared to the CFSW joints.

Suggested Citation

  • K. Tejonadha Babu & S. Muthukumaran & C. Sathiya Narayanan & C. H. Bharat Kumar, 2020. "Analysis And Characterization Of Forming Behavior On Dissimilar Joints Of Aa5052-O To Aa6061-T6 Using Underwater Friction Stir Welding," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 27(03), pages 1-14, March.
    • Handle: RePEc:wsi:srlxxx:v:27:y:2020:i:03:n:s0218625x1950121x
    DOI: 10.1142/S0218625X1950121X
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