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    Development of a Diffusion Mobility Database for Co-based Superalloys

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    IconCALPHAD thermodynamic descriptions (25.55Kb)
    CALPHAD Mobility descriptions (21.81Kb)
    IconExperimental and macro files for Zhou CoCrTi diffusion couples (41.12Kb)
    IconExperimental and macro files for Zhang CoCrW diffusion couples (5.471Kb)
    IconExperimental and macro files for Gomez diffusion couples (12.59Kb)
    IconExperimental and macro files for Chen CoCrNi diffusion couples (7.283Kb)
    IconExperimental data , macro files, and results for Co-Cr, Co-Ta, Ni-Ta, and CoCrTa diffusion couples (1.101Mb)
    IconExperimental and macro file for the Mabruri CoNiRe diffusion couples (8.879Kb)
    Description of files include for this record (18.02Kb)
    Author
    Campbell, Carelyn
    Lindwall, Greta
    Moon, Kil-won
    Williams, Maureen
    Tso, Whitney
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    Abstract
    To facilitate the development of high-temperature Co-based gamma-gamma prime superalloys, a Co-Ni based diffusion mobility database is developed for the eight component FCC (Face Centered Cubic) system of Co-Al-W-Ni-Cr-Ti-Ta-Re. A CALPHAD approach is used to represent the temperature and composition dependency of the multicomponent system. The mobility descriptions are based on previous assessment work for the Ni-based superalloys, published experimental and computational data, and established diffusion correlations. The initial mobility descriptions were then refined using additional diffusion couple experimental data, particularly for the Co-Cr, Co-Ta, and Ni-Ta systems. After re-optimizing the descriptions with the new experimental data, the mobility descriptions were validated using a collection of published diffusion couple composition profiles, which were not included in the initial assessment process.
    This item URI
    https://hdl.handle.net/11256/998
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