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Compression Studies on Particulate Composites of Ternary Al-Ti-Fe, and Quaternary Al-Ti-Fe-Nb and Al-Ti-Fe-Mn L12 Compounds

Published online by Cambridge University Press:  26 February 2011

K.S. Kumar ,
M.S. Dipietro  and
J.D. Whittenberger
K.S. Kumar
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
M.S. Dipietro
Affiliation:
Martin Marietta Laboratories, Baltimore, MD 21227
J.D. Whittenberger
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
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Abstract

Compression studies were conducted on monolithic and TiB2 particulatereinforced composites of AI22 Fe3 Ti8, both with and without minor quaternary alloying additions (2 at.% Nb and 2 at.% Mn) as a function of temperature and as a function of strain rate at high temperature. The volume fraction of reinforcement was varied between 0 and 20 percent. The particulate reinforcements were found to be effective in increasing ambient- and warm-temperature strength; at high temperatures, the monolithic material is stronger than the composites, although the composites are superior at slow strain rates. The microstructures of the monolithic and composite specimens were examined before and after deformation to explain these observations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 1039
Copyright
Copyright © Materials Research Society 1991

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References

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