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Processing and microstructure of melt spun NiAl alloysThe 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. pct 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 the 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 microns. Finally, fabrication of continuous fiber-reinforced composites which used pulverized ribbon as the matrix material was demonstrated.
Document ID
19900029886
Document Type
Conference Paper
Authors
Locci, I. E. (NASA Lewis Research Center; Case Western Reserve University Cleveland, OH, United States)
Noebe, R. D. (NASA Lewis Research Center Cleveland, OH, United States)
Moser, J. A. (NASA Lewis Research Center Cleveland, OH, United States)
Lee, D. S. (NASA Lewis Research Center Cleveland, OH, United States)
Nathal, M. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
METALLIC MATERIALS
Meeting Information
Symposium on High-Temperature Ordered Intermetallic Alloys III(Boston, MA)
Distribution Limits
Public
Copyright
Other