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IJEMS Vol.16(6) [December 2009] >


Title: Two different methods for improving the properties of IC-221M alloy
Authors: Kamali, Ali Reza
Hadi, Morteza
Nazarian-Samani, Masoud
Keywords: IC-221M
Ni5Zr
Heat treatment
Powder metallurgy
Issue Date: Dec-2009
Publisher: CSIR
Abstract: The formation of the Ni-Ni5Zr eutectic structure is the most important reason for the impoverished mechanical properties of the Ni3Al-based alloy containing Zr. On the other hand, this low melting point phase has a positive effect on castability of the alloy. Two different methods are used in this study for the development of a Ni5Zr-free structure. In the first method, arc remelting process, using Mo3Al8, ZrAl3 and NiAl master alloys, followed by a proper heat treatment led to the production of a modified Ni3Al-based alloy. In the second method, a powder metallurgy process is used to replace the casting method, thereby, lifting the need for Zr addition. A Ni3Al-based alloy containing Mo, Cr, and B is produced via mechanical alloying followed by hot pressing densification. The alloys thus produced are studied for their improved yield strengths.
Page(s): 449-455
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.16(6) [December 2009]

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