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The Tensile Behavior of a Ni3Al-Based Composite with TiC Reinforcement

Published online by Cambridge University Press:  26 February 2011

Gerhard E. Fuchs
Gerhard E. Fuchs*
Affiliation:
The Aerospace Corporation, P.O. Box 92957, Los Angeles, CA 90009–2957. Currently at General Electric Co., P.O. Box 1072, Schenectady, NY 12301.
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Abstract

The tensile properties of a powder processed intermetallic matrix composite (IMC) and a similarly processed matrix alloy were investigated in the temperature range 298–1273K. The matrix alloy utilized in the study was the advanced nickel-aluminide IC-221 (Ni-16Al-8Cr-1Zr-0.05B). The composites contained 25 vol% TiC particulate reinforcement. The specific modulus of the composites was 20–30% higher than that of typical Ni-base superalloys. The yield strength of the composites were 10–20% greater than that of the matrix at all test temperatures. However, the composites exhibited lower ductility than the matrix. SEM fractography revealed that tensile failure occurred at the matrix/particulate interface. However, remnants of the matrix was observed on TiC particles on the fracture surface, suggesting good matrix/particle bonding. The strengths of the composites were very competitive with Ni-base superalloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 133: Symposium H – High-Temperature Ordered Intermetallic Alloys III , 1988 , 615
Copyright
Copyright © Materials Research Society 1989

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References

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