C-17 高効率ガスタービン向け超耐熱合金の開発(材料,一般講演)

概要

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In past collaboration research between NIMS and MHI, Ni base single crystal alloy which have fine basic material properties and is expected to be used for 1700 deg-C class gas turbine have been developed. In this project, research and development for directional solidifying technology and material property stabilizing technology is now in practice as advanced research leading to mass production technology development. For practical application of candidate alloy, fine material property even in large size turbine blade castings. Thermo-mechanical fatigue property of large scale castings with heat treatment in mass-production furnace was evaluated. Meanwhile material properties of single crystal alloy are severely affected by crystal orientation. Trial analysis and experiment were carried out, and it was confirmed that the analysis result have good agreement with experiments in cylindrical shape casting test.
2011-07-06