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High Temperature Properties of Equialomic FeAl with Ternary Additions

Published online by Cambridge University Press:  21 February 2011

R. H. Titran ,
K. M. Vedula  and
G. G. Anderson
R. H. Titran
Affiliation:
Nasa Lewis Research Center, 21000 Brookpark Road, Cleveland, Ohio 44135
K. M. Vedula
Affiliation:
Case Western Reserve University, Department of Metallurgy and Materials Science, Cleveland, OH 44106
G. G. Anderson
Affiliation:
Case Western Reserve University, Department of Metallurgy and Materials Science, Cleveland, OH 44106
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Abstract

The aluminide intermetallic compounds are considered potential structural materials for aerospace applications. The B2 binary aluminide FeAl has a melting point in excess of 1500 K, is of simple cubic structure, exist over a wide range of composition with solubility for third elements and is potentially self-protecting in extreme environments. The B2 FeAl compound has been alloyed with 1 to 5 at % ternary additions of Si, Ti, Zr, Hf, Cr, Ni, Co, Nb, Ta, Mo, W, and Re. The alloys were prepared by blending a third elemental powder with pre-alloyed binary FeAl powder. Consolidation was by hot extrusion at 1250 K.

Annealing studies on the extruded rods showed that the third element addition can be classified into three categories based upon the amount of homogenization and the extent of solid solutioning. Constant strain rate compression tests were performed to determine the flow stress as a function of temperature and composition. The mechanical strength behavior was dependent upon the third element homogenization classification.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 39: Symposium G – High-Temperature Ordered Intermetallic Alloys I , 1984 , 309
Copyright
Copyright © Materials Research Society 1985

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References

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