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The Effects of Scandium and Zirconium Additions on Aluminum Mechanical Properties, Post-Braze Grain Structure, and Extrusion

Williams, Cory R.

Abstract Details

2012, Master of Science (MS), Ohio University, Mechanical Engineering (Engineering and Technology).
The purpose of this work was to evaluate the ability of Sc and Zr to inhibit recrystallization and grain growth of cold-worked aluminum parts that are brazed into assemblies. Extruded, multi-channel tube, used for automotive climate control systems, are sized and straightened prior to assembly into heat exchangers. This small amount of plastic strain (cold-work) is the driving force for recrystallization and large grain growth during the brazing process, which takes place at approximately 600°C. This generally coincides with a significant decrease in part strength. A 1000 series aluminum alloy with additions of 0.2% Sc and 0.05% Zr was evaluated with respect to the brazing thermal cycle and a typical amount of cold-work imposed during straightening and sizing. The effect on extrusion was considered, and a comparison was made to AA 3102, a typical alloy for this application.
Frank Kraft (Advisor)

Recommended Citations

Citations

  • Williams, C. R. (2012). The Effects of Scandium and Zirconium Additions on Aluminum Mechanical Properties, Post-Braze Grain Structure, and Extrusion [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1331521298

    APA Style (7th edition)

  • Williams, Cory. The Effects of Scandium and Zirconium Additions on Aluminum Mechanical Properties, Post-Braze Grain Structure, and Extrusion. 2012. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1331521298.

    MLA Style (8th edition)

  • Williams, Cory. "The Effects of Scandium and Zirconium Additions on Aluminum Mechanical Properties, Post-Braze Grain Structure, and Extrusion." Master's thesis, Ohio University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1331521298

    Chicago Manual of Style (17th edition)