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A Novel Characterization of Friction Stir Welds Created Using Active Temperature Control

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2021, Master of Science, Miami University, Mechanical and Manufacturing Engineering.
Aluminum alloys 2024-T4 and 7075-T6 were joined by Friction Stir Welding (FSW) under active PID temperature control in similar-alloy welds. Positron Annihilation Lifetime Spectroscopy (PALS) and other characterization techniques were used to quantify the effects of temperature control. Three temperature setpoints were used, including an uncontrolled trial. Precipitation-hardened aluminum is strongly affected by heat-treatment temperature, so controlling the weld temperature will control the precipitation mechanisms in and around the weld. PALS profiles show a hardness map of the weld profile, which correlates to a temperature profile from the numerical model. Ultimately, precipitation can be indirectly determined through the correlation of these profiles and is confirmed through tensile testing. Statistical analysis did not show the significance of temperature control over the length of the weld, but significant variation was shown over different temperature trials. Finally, temperature control can be used in FSW to tailor weld properties to a desired application, but more testing and experimentation is necessary to fully utilize this technique.
Carter Hamilton, Dr. (Advisor)
Giancarlo Corti, Dr. (Committee Member)
Fazeel Khan, Dr. (Committee Member)
30 p.

Recommended Citations

Citations

  • Pearl, D. L. (2021). A Novel Characterization of Friction Stir Welds Created Using Active Temperature Control [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1618585976565749

    APA Style (7th edition)

  • Pearl, David. A Novel Characterization of Friction Stir Welds Created Using Active Temperature Control. 2021. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1618585976565749.

    MLA Style (8th edition)

  • Pearl, David. "A Novel Characterization of Friction Stir Welds Created Using Active Temperature Control." Master's thesis, Miami University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1618585976565749

    Chicago Manual of Style (17th edition)