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Processing and Microstructure of Melt Spun Niai Alloys

Published online by Cambridge University Press:  26 February 2011

I. E. Locci ,
R. D. Noebe ,
J. A. Moser ,
D. S. Lee  and
M. Nathal
I. E. Locci
Affiliation:
Case Western Reserve University, Cleveland, OH, 44106. NASA Lewis Research Center, Cleveland, OH., 44135.
R. D. Noebe
Affiliation:
NASA Lewis Research Center, Cleveland, OH., 44135.
J. A. Moser
Affiliation:
NASA Lewis Research Center, Cleveland, OH., 44135.
D. S. Lee
Affiliation:
NASA Lewis Research Center, Cleveland, OH., 44135.
M. Nathal
Affiliation:
NASA Lewis Research Center, Cleveland, OH., 44135.
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Abstract

The influence of various melt spinning parameters and the effect of consolidation on the microstructure of melt spun NiAl and NiAl + W alloys have been examined by optical and electron microscopy techniques. It was found that the addition of 0.5 at.% W to NiAl results in a fine dispersion of W particles after melt spinning which effectively controls grain growth during annealing treatments or consolidation at temperatures between 1523 and 1723 K. Increased wheel speeds are effective at reducing both ribbon thickness and grain size, such that proper choice of both composition and casting parameters can produce structures with grain sizes as small as 2 μ m. Finally, fabrication of continuous fiber reinforced composites which used pulverized ribbon as the matrix material was demonstrated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 639
Copyright
Copyright © Materials Research Society 1989

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References

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