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Microstructural Evolution of Aluminum Alloy 2219-T87 with Hot Torsion and Bobbin Tool Friction Stir Welding

Gilmore, Andrew Barrett
http://orcid.org/0000-0002-4303-8004
http://rave.ohiolink.edu/etdc/view?acc_num=osu1650445885584973

Abstract Details

2022, Master of Science, Ohio State University, Welding Engineering.
This study comprehensively analyzed the mechanical behavior and microstructural evolution of aluminum alloy AA2219-T87 undergoing high deformation and strain rates at elevated temperature via hot torsion tests. An integrated experimental and modeling approach has been employed, where a finite element model is developed with ABAQUS to address local deformation and non-uniform temperature distribution along the specimen gauge section. A Johnson-Cook constitutive material model is calibrated based on the calculated and measured torque curves at different conditions. Combined with the ABAQUS calculated local thermo-mechanical conditions, microstructure modeling using established literature-based equations are established to provide insights into grain size distribution and recrystallization mechanisms. The calibrated material constitutive model, recrystallization model, and grain size model can be utilized to model various manufacturing processes which involves hot deformation of aluminum alloys in the intermediate strain rate range of 14/s-78/s. These findings were applied to further works with Bobbin Tool Friction Stir Welding of thick plate AA2219. Analysis of cross sections and welding parameter effects on microstructural and phenomenological outcomes were performed to maximize understanding of the specific material behavior in elevated temperature, high strain rate processes as seen in hot torsion as well as friction based solid state welding.
Wei Zhang (Committee Member)
Xun Liu (Advisor)
91 p.
Engineering
Friction Stir Welding, Dynamic recrystallization, Bobbin tool, Grain size

Recommended Citations

Citations

  • Gilmore, A. B. (2022). Microstructural Evolution of Aluminum Alloy 2219-T87 with Hot Torsion and Bobbin Tool Friction Stir Welding [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1650445885584973

    APA Style (7th edition)

  • Gilmore, Andrew. Microstructural Evolution of Aluminum Alloy 2219-T87 with Hot Torsion and Bobbin Tool Friction Stir Welding. 2022. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1650445885584973.

    MLA Style (8th edition)

  • Gilmore, Andrew. "Microstructural Evolution of Aluminum Alloy 2219-T87 with Hot Torsion and Bobbin Tool Friction Stir Welding." Master's thesis, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1650445885584973

    Chicago Manual of Style (17th edition)

osu1650445885584973
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This open access ETD is published by The Ohio State University and OhioLINK.