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1200 K Compressive Properties of N-Containing Nial

Published online by Cambridge University Press:  22 February 2011

J. Daniel Whittenberger ,
R. D. Noebe  and
D. R. Wheeler
J. Daniel Whittenberger
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
R. D. Noebe
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
D. R. Wheeler
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
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Abstract

As part of a series of experiments to understand the role of N on the strength of NiAl, a heat of NiAl was enriched with N by melting and atomization to powder in a nitrogen atmosphere. Following consolidation of the powder by hot extrusion, 1200 K compressive properties were measured in air. Within the range of strain rates examined, 10−3 to 10−9 s−1, the strength of the N-enriched NiAl was greater than that of a simple 15 µm grain size polycrystalline, binary NiAl alloy. For the most part the overall improvement in strength is ascribed to the fine grain size of the N-doped NiAl rather than the alloy chemistry; however, the alloy displayed a complex behavior exhibiting both weakening effects as well as strengthening ones.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 279
Copyright
Copyright © Materials Research Society 1995

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References

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