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Ji-MS Thesis_Final.pdf (10.03 MB)

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TENSION AND FATIGUE BEHAVIOR OF AL-2124/SIC-PARTICULATE METAL-MATRIX COMPOSITES

Xia, Ji
http://orcid.org/0000-0003-3376-5029
http://rave.ohiolink.edu/etdc/view?acc_num=case1548169132710822

Abstract Details

2019, Master of Sciences (Engineering), Case Western Reserve University, Materials Science and Engineering.
The tensile and fatigue properties of the Al2124/25%/SiCp/3 μm were explored. The focus of this work is on this metal matrix composite that has been T4 heat treated, and tested in the longitudinal extrusion direction. The tension tests were performed with strain rate of 0.001/s. Its elastic modulus, yield strength and ultimate tensile strength were improved by 40%, 6%, and 41% compared to the monolithic matrix alloy. The fatigue tests were conducted on polished hourglass fatigue samples with stress ratio R = 0.1, and test frequency of 20 Hz. The S-N curve based on local stress and cycles to failure was also compared to the monolithic matrix alloy. Improved fatigue performance was observed for this composite in both low cycle fatigue (LCF) region and high cycle fatigue (HCF) region. The fatigue strength is 448 MPa at 107 cycles. A unique cone-shaped fracture feature was observed for samples failed in HCF. Calculations based on fracture morphologies suggested catastrophic fatigue fracture occurred as the material reached its critical fracture toughness.
John Lewandowski (Advisor)
Matthew Willard (Advisor)
William Baeslack (Committee Member)
131 p.
Materials Science
MMC; Tension; Fatigue; S-N Curves

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Citations

  • Xia, J. (2019). TENSION AND FATIGUE BEHAVIOR OF AL-2124/SIC-PARTICULATE METAL-MATRIX COMPOSITES [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1548169132710822

    APA Style (7th edition)

  • Xia, Ji. TENSION AND FATIGUE BEHAVIOR OF AL-2124/SIC-PARTICULATE METAL-MATRIX COMPOSITES. 2019. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1548169132710822.

    MLA Style (8th edition)

  • Xia, Ji. "TENSION AND FATIGUE BEHAVIOR OF AL-2124/SIC-PARTICULATE METAL-MATRIX COMPOSITES." Master's thesis, Case Western Reserve University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1548169132710822

    Chicago Manual of Style (17th edition)

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© 2019, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.