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HIGH CYCLE FATIGUE STUDIES OF CARBURIZED NICKEL-BASE SUPERALLOYS AND STAINLESS STEELS

Ge, Yindong
http://rave.ohiolink.edu/etdc/view?acc_num=case1244230393

Abstract Details

2009, Master of Sciences (Engineering), Case Western Reserve University, Materials Science and Engineering.
Fatigue properties of non-treated and carburized Ni-base IN718, Fe-base A286 and duplex stainless steel 2205 were investigated in fully-reversed uniaxial fatigue tests. The carburization process changes the fatigue crack initiation site of IN718 from surface-nucleated for the non-treated samples to centrally-nucleated for carburized samples. However, the fatigue lifetimes are not increased, because of defects that exist in the central areas of all the specimens functioning as weak points that served as sites for fatigue crack nucleation. The fatigue resistance of carburized A286 samples is modestly improved. Additionally, the fatigue strength coefficient and exponent of A286 are changed by carburization, which also effectively suppresses the formation of multiple crack nucleation sites at the surface. Carburized 2205 samples exhibited significant improvement in fatigue limit and fatigue lifetime compared to non-treated samples at the same cyclic stress, in spite of the existence of oxide inclusions, which act as centers for fatigue crack nucleation.
Arthur Heuer (Committee Chair)
Metallurgy
High Cycle Fatigue; carburization; IN718; A286; 2205

Recommended Citations

Citations

  • Ge, Y. (2009). HIGH CYCLE FATIGUE STUDIES OF CARBURIZED NICKEL-BASE SUPERALLOYS AND STAINLESS STEELS [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1244230393

    APA Style (7th edition)

  • Ge, Yindong. HIGH CYCLE FATIGUE STUDIES OF CARBURIZED NICKEL-BASE SUPERALLOYS AND STAINLESS STEELS. 2009. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1244230393.

    MLA Style (8th edition)

  • Ge, Yindong. "HIGH CYCLE FATIGUE STUDIES OF CARBURIZED NICKEL-BASE SUPERALLOYS AND STAINLESS STEELS." Master's thesis, Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1244230393

    Chicago Manual of Style (17th edition)

case1244230393
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© 2009, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.