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|Title:||Two different methods for improving the properties of IC-221M alloy|
|Authors:||Kamali, Ali Reza|
|Abstract:||The formation of the Ni-Ni<sub>5</sub>Zr eutectic structure is the most important reason for the impoverished mechanical properties of the Ni<sub>3</sub>Al-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 Ni<sub>5</sub>Zr-free structure. In the first method, arc remelting process, using Mo<sub>3</sub>Al<sub>8</sub>, ZrAl<sub>3 </sub>and NiAl master alloys, followed by a proper heat treatment led to the production of a modified Ni<sub>3</sub>Al-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 Ni<sub>3</sub>Al-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.|
|ISSN:||0975-1017 (Online); 0971-4588 (Print)|
|Appears in Collections:||IJEMS Vol.16(6) [December 2009]|
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