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A Mathematical and Experimental Approach to Improve Strength and Corrosion Resistance of Gas Tungsten Arc, Electron Beam and Friction Stir Welded AA2219-T87 Al-Alloy

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Abstract

Aluminium alloy AA2219 offers excellent weldability due to its low sensitivity to hot cracking, although it has inadequate weld joint strength. The reduction in the alloy's strength is mainly due to the melting and solidification process. The process parameters that influence the thermomechanical and metallurgical events that occur during welding are primarily responsible for the weld quality. The main objective of this study is to improve tensile strength and corrosion resistance by adopting post weld heat treatment. The influence of post weld heat treatment on the characteristics of AA2219-T87 aluminium alloy welded by gas tungsten arc (GTA), electron beam (EB), and friction stir (FS) processes was discussed in this paper. Experimentation was planned by utilizing a Box-Behnken design of experiments. Square butt joints were fabricated at planned experimental conditions, and samples were prepared for analysis. Response surface methodology (RSM) was employed and used to formulate mathematical models that incorporate welding process parameters to anticipate properties. A global optimization algorithm, simulated annealing (SA), was used to perform multi-objective optimization. For optimized welded samples, post weld heat treatment was shown. The findings indicate that post weld heat treatment improves the strength and corrosion resistance of AA2219-T87 aluminium alloy.

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Acknowledgements

This work was supported in part by the Department of Metallurgical Engineering, Andhra University, Visakhapatnam, India.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Andhra University, Visakhapatnam, 530003, India

    B. Rajnaveen & G. Rambabu

  2. Department of Metallurgical Engineering, Andhra University, Visakhapatnam, 530003, India

    K. Prakash & K. Srinivasa Rao

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  1. B. Rajnaveen
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Rajnaveen, B., Rambabu, G., Prakash, K. et al. A Mathematical and Experimental Approach to Improve Strength and Corrosion Resistance of Gas Tungsten Arc, Electron Beam and Friction Stir Welded AA2219-T87 Al-Alloy. J. Inst. Eng. India Ser. D 104, 1–13 (2023). https://doi.org/10.1007/s40033-022-00368-4

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