MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF M91 CAST Ni-BASE SUPERALLOY

Acta Metall Sin

1990, Vol. 26

Issue (6): 52-56 DOI:

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MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF M91 CAST Ni-BASE SUPERALLOY

ZHANG Bingda;TONG Yingjie;ZHANG Jiayuan;LIU Zezhou;ZHU Yaoxiao Institute of Metal Research; Academia Sinica; Shenyang

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ZHANG Bingda;TONG Yingjie;ZHANG Jiayuan;LIU Zezhou;ZHU Yaoxiao Institute of Metal Research; Academia Sinica; Shenyang. MICROSTRUCTURE AND SOLIDIFICATION CHARACTERISTICS OF M91 CAST Ni-BASE SUPERALLOY. Acta Metall Sin, 1990, 26(6): 52-56.

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Abstract In comparison with conventional superalloys, no carbide but signifi-cant γ+M_3B_2 and γ+γ' eutecties were revealed to precipitate in the stable as-caststructure of M91 cast Ni--base superalloy which is abundant in B and minified inC. During solidification of the superalloy, the residual liquid is much less and thetendency to porousness is inconsiderable. This superalloy seems to be available forturbine blade and other integral casting under medium temperature and long--termservices.

Key words: superalloy microstructure solidification

Received: 18 June 1990

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