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Characterization of Friction-stir Riveting AA5754

Wang, Zixi
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1416509557

Abstract Details

2014, Master of Science, University of Toledo, Mechanical Engineering.
Driven by the consideration of reducing fuel consumption, rapidly growing automobile industries are becoming increasingly attracted to weight reduction techniques. Due to their distinctive strength-to-weight ratio and ductility, aluminum alloys are widely accepted as vehicle body materials by global auto makers. But there are still barriers to be overcome, such as the difficulty in welding these materials and the high consumption rate of electrodes. The present investigation is about using a new joining technique for joining aluminum alloy AA5754 called Friction-Stir Riveting, developed at the University of Toledo, which combines the two previously well-developed techniques of FSW and SPR. In this process, a joint is formed by spinning and pressing a steel rivet into two layers of aluminum sheets. As the aluminum was not melted, adverse metallurgical changes in welding can be avoided. Tensile-shear tests were conducted, showing the peak load, displacement and energy of the joint with different processing parameters such as spindle speed, feed rate and feed depth. After this, Design of Experiments method was used analyzing a two-level, three-factor, and three-replicate experiment, trying to find out the best combination of processing parameters resulting in a good joining quality. In this study, microstructure has been examined employing the SEM, DSC and EBSD techniques, investigating on the plastic strain, grain size, grain orientation, and grain boundary characteristics of a riveted joint. TMAZ was shown having the largest amount of deformation and the smallest grain size, and both the TMAZ and HAZ are proven to have undergone a dynamic recrystallization making the finished FSR a heat stable structure.
Hongyan Zhang (Advisor)
74 p.
Mechanical Engineering
Friction-stir Riveting; AA 5754; SEM; EBSD

Recommended Citations

Citations

  • Wang, Z. (2014). Characterization of Friction-stir Riveting AA5754 [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1416509557

    APA Style (7th edition)

  • Wang, Zixi. Characterization of Friction-stir Riveting AA5754. 2014. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1416509557.

    MLA Style (8th edition)

  • Wang, Zixi. "Characterization of Friction-stir Riveting AA5754." Master's thesis, University of Toledo, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1416509557

    Chicago Manual of Style (17th edition)

toledo1416509557
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© 2014, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.