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Optimizing friction stir welding parameters to maximize tensile strength of AA2219 aluminum alloy joints

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Abstract

AA2219 aluminium alloy (Al-Cu-Mn alloy) has gathered wide acceptance in the fabrication of lightweight structures requiring a high strength-to-weight ratio and good corrosion resistance. In contrast to the fusion welding processes that are routinely used for joining structural aluminium alloys, the friction stir welding (FSW) process is an emerging solid state joining process in which the material that is being welded does not melt and recast. This process uses a non-consumable tool to generate frictional heat in the abutting surfaces. The welding parameters such as tool rotational speed, welding speed, axial force etc., and the tool pin profile play a major role in determining the joint strength. An attempt has been made here to develop a mathematical model to predict the tensile strength of friction stir welded AA2219 aluminium alloy by incorporating FSW process parameters. A central composite design with four factors and five levels has been used to minimize the number of experimental conditions. The response surface method (RSM) has been used to develop the model. The developed mathematical model has been optimized using the Hooke and Jeeves search technique to maximize the tensile strength of the friction stir welded AA2219 aluminium alloy joints.

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Authors and Affiliations

  1. Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, 608 002, Tamil Nadu, India

    S. Babu, K. Elangovan, V. Balasubramanian & M. Balasubramanian

Authors
  1. S. Babu
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  2. K. Elangovan
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  3. V. Balasubramanian
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  4. M. Balasubramanian
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Correspondence to S. Babu.

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Babu, S., Elangovan, K., Balasubramanian, V. et al. Optimizing friction stir welding parameters to maximize tensile strength of AA2219 aluminum alloy joints. Met. Mater. Int. 15, 321–330 (2009). https://doi.org/10.1007/s12540-009-0321-3

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  • DOI: https://doi.org/10.1007/s12540-009-0321-3

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