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Microstructural characterization of dissimilar friction stir welds between AA2219 and AA5083

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Abstract

Fusion welding of dissimilar aluminum alloys is very challenging. In the present work, Al-Cu alloy AA2219-T87 was friction stir welded to Al-Mg alloy AA5083-H321. Weld microstructures, hardness, and tensile properties were evaluated in as-welded condition. Microstructural studies revealed that the nugget region was primarily composed of alloy 2219, which was placed on the advancing side. No significant mixing of the two base materials in the nugget region was observed. Hardness studies revealed that the lowest hardness in the weldment occurred in the heat-affected zone on alloy 5083 side, where tensile failure were observed to take place. Tensile tests indicated a joint efficiency of around 90%, which is substantially higher than what can be achieved with conventional fusion welding. Overall, the results show that satisfactory butt welds can be produced between AA2219-T87 and Al-Mg alloy AA5083-H321 sheets using friction stir welding.

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Authors and Affiliations

  1. Materials Joining Laboratory, Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600 036, India

    J. J. S. Dilip & G. D. Janaki Ram

  2. Department of Mechanical Engineering, Anna University, Chennai, 600025, India

    M. Koilraj & V. Sundareswaran

  3. Tagore Engineering College, Rathinamangalam, Cheenai, 600 048, India

    S. R. Koteswara Rao

Authors
  1. J. J. S. Dilip
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  2. M. Koilraj
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  3. V. Sundareswaran
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  4. G. D. Janaki Ram
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  5. S. R. Koteswara Rao
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Correspondence to G. D. Janaki Ram.

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Dilip, J.J.S., Koilraj, M., Sundareswaran, V. et al. Microstructural characterization of dissimilar friction stir welds between AA2219 and AA5083. Trans Indian Inst Met 63, 757–764 (2010). https://doi.org/10.1007/s12666-010-0116-8

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  • DOI: https://doi.org/10.1007/s12666-010-0116-8

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