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THE SOLUBILITIES OF CARBON AND NITROGEN IN IRON, NICKEL AND TITANIUM-BASED ALLOYS UNDER PARAEQUILIBRIUM CONDITIONS

Gu, Xiaoting

Abstract Details

2008, Master of Sciences (Engineering), Case Western Reserve University, Materials Science and Engineering.
Advances in low temperature carburization technology have provided an impetus to examine the solubility of interstitials in stainless steels and nickel based superalloys under paraequilibrium conditions. The solubilities of interstitials in such alloys under paraequilibrium conditions were calculated employing the CALPHAD formalism for solution thermodynamics. The basis of CALPHAD multi-sublattice modeling was reviewed and its application to interstitial solid solutions was developed. The accuracy of such modeling is directly dependent upon the values of the CALPHAD parameters used. An extensive evaluation of the fcc chromium parameters was performed, because the currently accepted CALPHAD parameters in the steels and Fe-based alloys database and used with Thermo-Calc software were found to be insufficiently exothermic. The solubilities of carbon and nitrogen under paraequilibrium conditions in several alloys were calculated. The reliability of the revised fcc chromium parameters and the possibility of spinodal decomposition in the fcc metal-carbon solid solutions were discussed.
Gary Michal (Advisor)
75 p.

Recommended Citations

Citations

  • Gu, X. (2008). THE SOLUBILITIES OF CARBON AND NITROGEN IN IRON, NICKEL AND TITANIUM-BASED ALLOYS UNDER PARAEQUILIBRIUM CONDITIONS [Master's thesis, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1196354589

    APA Style (7th edition)

  • Gu, Xiaoting. THE SOLUBILITIES OF CARBON AND NITROGEN IN IRON, NICKEL AND TITANIUM-BASED ALLOYS UNDER PARAEQUILIBRIUM CONDITIONS. 2008. Case Western Reserve University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1196354589.

    MLA Style (8th edition)

  • Gu, Xiaoting. "THE SOLUBILITIES OF CARBON AND NITROGEN IN IRON, NICKEL AND TITANIUM-BASED ALLOYS UNDER PARAEQUILIBRIUM CONDITIONS." Master's thesis, Case Western Reserve University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1196354589

    Chicago Manual of Style (17th edition)