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Creep of Mechanically-Alloyed NiAl Containing 13 Vol % Mo or Mo2C Dispersoids

Published online by Cambridge University Press:  10 February 2011

A. Lakki  and
D. C. Dunand
A. Lakki
Affiliation:
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA presently at: Max-Planck-Institut fur Metallforschung, Seestrasse 92, D-70174 Stuttgart, Germany, lakkis@mf.mpi-stuttgart.mpg.de
D. C. Dunand
Affiliation:
presently at: Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA, dunand@nwu.edu.
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Abstract

Dispersion-strengthened nickel aluminide NiAl was synthesized by reactive mechanical alloying from elemental powders. The microstructure and creep properties of these materials was compared for two cases: (i) NiAl-Mo, where dispersoids are in the form of a ductile, metallic phase and (ii) NiAl- Mo2C, where the dispersoids are a brittle, ceramic phase. Also, the effect of annealing treatments which coarsened both matrix grains and dispersoids was investigated. Inhibited diffusional creep is identified as the rate-controlling creep mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK9.2.1
Copyright
Copyright © Materials Research Society 1999

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References

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