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Experimental and optimization studies of ultrasonic-assisted friction stir weldments of AA2014-T651 using graph theory

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Abstract

The present study focuses on development of mechanical characteristics in ultrasonic vibration assisted friction stir welding (UAFSW) of AA 2014-T651 weldment using graph theory algorithm and utility concept. A set of UAFSW experiments were carried out using plain and taper threaded cylindrical tool pin profile on AA 2014-T651 weldments at different levels of tool rotation speed and traverse speed and experimental results for the tensile strength, yield strength, percentage of elongation, impact strength, and micro hardness were collected. Microstructural studies were also made and correlated with the mechanical characteristics and found that the mechanical characteristics were increased. The process parameters were optimized by the proposed methodology as 1100 rpm of tool rotational speed and 40 mm/min of traverse speed. The tensile strength, yield strength, percentage of elongation, impact strength, and micro hardness were found to be 431.69 MPa, 307.47 MPa, 11.66%, 8.32 J, and 139 HV respectively at optimum working condition. The weld joint obtained using a taper threaded tool pin profiled tool with ultrasonic vibration possesses 90% of joint efficiency.

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Acknowledgements

The authors are very much thankful to the authorities of SERB/F/11385/2018-2019 for granting funds to this project and Vignan’s Deemed to be university, for extending the facilities to complete the project work.

Funding

This work was supported by the Department of Science and technology, Govt. of India (File number. EEQ/2018/000865).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Vignan’s Foundation for Science Technology and Research (Deemed to be University), Guntur, 522213, India

    Suvarna Raju Lam

  2. Department of Mechanical Engineering, Vignan’s Lara Institute of Technology and Science, Guntur, 522213, India

    Borigorla Venu

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  1. Suvarna Raju Lam
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  2. Borigorla Venu
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Contributions

Dr. L Suvarna Raju and Dr. B Venu have defined the objectives of the present study and experimental plan. Dr. B Venu carried out experimentation and collected experimental results, Dr. L Suvrna Raju has studied microstructural and mechanical characteristics and both the authors have involved in optimization and preparation of manuscript.

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Correspondence to Borigorla Venu.

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Lam, S.R., Venu, B. Experimental and optimization studies of ultrasonic-assisted friction stir weldments of AA2014-T651 using graph theory. Int J Adv Manuf Technol 121, 7551–7568 (2022). https://doi.org/10.1007/s00170-022-09678-z

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  • DOI: https://doi.org/10.1007/s00170-022-09678-z

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