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Tensile and Creep Behavior of Ordered Orthorhombic Ti2A1Nb-Based Alloys

Published online by Cambridge University Press:  26 February 2011

R.G. Rowe ,
D.G. Konitzer ,
A.P. Woodfield  and
J.C. Chesnutt
R.G. Rowe
Affiliation:
Ge Corporate Research and Development,Schenectady,NY 12301
D.G. Konitzer
Affiliation:
Ge Aircraft Engines,Cincinnati,OH 45215
A.P. Woodfield
Affiliation:
Ge Corporate Research and Development,Schenectady,NY 12301
J.C. Chesnutt
Affiliation:
Ge Aircraft Engines,Cincinnati,OH 45215
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Abstract

Titanium aluminide alloys with compositions near Ti-25A1-25Nb at.% were prepared by both rapid solidification and ingot techniques. Their tensile and creep properties were studied after heat treatment to produce various microstructures containing ordered orthorhombic (O) [1], ordered beta (βo), and α2 phases. It was found that these alloys had higher specific strength from room temperature to 760°C than conventional α2 alloys. Ductility and tensile strength of O+βo alloys were strongly dependent upon heat treatment, with the highest strength observed as-heat-treated, and the highest ductility after long term aging. The creep resistance of single phase O and two phase O+βo alloys was strongly dependent upon heat treatment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 703
Copyright
Copyright © Materials Research Society 1991

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References

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