Elevated temperature mechanical properties of reaction synthesized Fe{sub 3}Al

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00029-U· OSTI ID:69687

Clark, C R; Wright, R N; Wright, J K; Rabin, B H ^[1]

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1. Lockheed Idaho Technologies Co., Idaho Falls, ID (United States). Idaho National Engineering Lab.

Fe{sub 3}Al produced by reaction synthesis was found to have higher yield strength over a wide range of temperatures compared to material of similar composition produced by conventional hot extrusion of prealloyed powder. The increase in strength is attributed to the smaller grain size of the reaction synthesized material. Essentially equal strain rate sensitivity has been observed for the materials produced by the different methods, with a maximum strain rate sensitivity coefficient of about 0.3. Super plasticity is not observed in the reaction synthesized material despite the material having a fine, stable, grain size. This is attributed primarily to particle pinning of the grain boundaries, and suggests that superplastic deformation is not necessarily expected to be a general property of iron aluminides in which a fine grained microstructure is formed.

• DOE Contract Number: AC07-94ID13223
• OSTI ID: 69687
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 11 Vol. 32; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
GRAIN BOUNDARIES
GRAIN SIZE
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROSTRUCTURE
PLASTICITY
POWDER METALLURGY
STRAIN RATE
YIELD STRENGTH