SOLIDIFICATION MICROSTRUCTURE OF Ni-BASE SUPERALLOY POWDER

Abstract

Abstract: The solidification microstructure and phase composition of Ni-base superalloy FGH95 pow- der with different mesh size have been investigated.The structure transition was found from dendrite in major into cellular structure as the powder size reduces and the cooling rate in- creases.The predominant phase was identified as MC-type carbide,with different morphologies,which may be related to their composition and the condition of solidification.Minor phases,such as boride,Laves and primary γ' are also present as ac- companiments of the carbide.

Key words: powder metallurgy, superalloy, microstructure, solidification

HU Benfu LI Huiying WU Chengjian ZHANG Shouhua University of Science and Technology Beijing,Beijing,China Associate Professor,Dept.of Material Science and Engineering,University of Science and technology Beijing,Beijing 100083,China.. SOLIDIFICATION MICROSTRUCTURE OF Ni-BASE SUPERALLOY POWDER[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(2): 97-102.

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SOLIDIFICATION MICROSTRUCTURE OF Ni-BASE SUPERALLOY POWDER

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