Effects of alloying elements on the equilibrium precipitated phases, incipient and final melting temperature of Mar-M247 superalloy were studied through thermodynamic calculation. The results show that the main phases are γ' precipitates, MC, M6C, M23C6 carbides, μ phases, MB2 and M3B2 borides. Hf and Ta segregate more seriously mostly during solidification process. Around the composition range, Cr, Mo, Ti and Hf influence the initial melting temperature mostly. Precipitation temperature and precipitation amount of carbides increase linearly with the increase of the C content. Furthermore, Hf, Ti and Ta are contributed to the precipitation of MC carbides, Cr improves the precipitation of M23C6 and W and Mo are beneficial to the precipitation of M6C. The precipitation of μ phase is mainly influenced by Mo and W, the precipitation temperature and mass fraction of μ phase increase as the content of Mo and W increase. The precipitation behavior of γ' phase is affected by Al, Ti and Ta contents, and their effects decrease in turn.


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    Title :

    Thermodynamic Calculation and Analysis of Equilibrium Precipitated Phases in Mar-M247 Superalloy


    Contributors:
    AN Ning (author) / YUAN Xiaofei (author) / NIU Yongji (author) / TIAN Jianjun (author) / LI Zhenrui (author)


    Publication date :

    2018




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




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