Measurement of the Densities of Nickel-Based Ternary, Quaternary and Commercial Alloys

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  • Mukai Kusuhiro
    Department of Materials Science and Engineering, Faculty of Engineering, Kyushu Institute of Technology
  • Li Zushu
    Department of Materials, Imperial College London
  • Fang Liang
    Department of Materials Science and Engineering, Faculty of Engineering, Kyushu Institute of Technology

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The modified sessile drop method (MSDM) and the modified pycnometric method (MPM) have been employed to measure precisely the densities of liquid nickel-based ternary (Ni-Co-Al) and quaternary (Ni-Co-Al-Cr, Ni-Co-Al-Mo, Ni-Cr-Al-Mo) alloys and four commercial superalloys in liquid and mushy states. There was a good agreement between the values measured by the two methods. The measured densities of liquid model alloys and commercial superalloys in liquid and mushy states decreased linearly with increasing temperature for the experimental temperature range. The temperature coefficient of the density of liquid ternary Ni-Co-Al alloys measured in this work can be represented as a quadratic function of the aluminium concentration in the alloys. The density of liquid Ni-Co-Al alloys can be expressed as a function of both temperature and aluminium concentration in the alloys. The recommended equations for the densities of liquid nickel-based ternary and quaternary alloys and four commercial superalloys in liquid and mushy states were obtained by analysing density values measured by both MSDM and MPM. The calculated values from the recommended density equations show good agreement with those measured by both MSDM and MPM.

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 45 (10), 2987-2993, 2004

    公益社団法人 日本金属学会

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