MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF AS-CAST Ni-BASE SUPERALLOY M91

Abstract

Abstract: In comparison with conventional superalloys,no carbide but significant amount of γ+M_3B_2 and γ+γ′ eutectics were revealed to precipitate in the stable as-cast structure of Ni-base superalloy M91 which is abundant in B and minfied in C.During solidification of the superalloy,the residual liquid is much less and the tendency to porousness is inconsiderable.This superalloy seems to be available for turbine blade and other integral cast- ings under intermediate temperature and long-term services.

Key words: superalloy, microstructure, solidification

ZHANG Bingda TONG Yingjie ZHANG Jiayuan LIU Zezhou ZHU Yaoxiao Institute of Metal Research,Academia Sinica,Shenyang,China. MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF AS-CAST Ni-BASE SUPERALLOY M91[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(3): 199-203.

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MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF AS-CAST Ni-BASE SUPERALLOY M91

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