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Creep Deformation of Titanium Aluminides with TiB2

Published online by Cambridge University Press:  01 January 1992

C. R. Feng  and
K. Sadananda
C. R. Feng
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375
K. Sadananda
Affiliation:
Materials Science and Technology Division, Naval Research Laboratory, Washington, DC 20375
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Abstract

Creep deformation of as-forged and heat-treated titanium aluminides, Ti-48Al with 5 and 10% volume fraction of TiB2, has been studied under tension in the temperature range of 649°-871°C to determine the rate-controlling mechanism. Microstructure of these alloys correspond to a mixture of equiaxed grains of γ and lamellar regions containing eutectoid γ+α2.

Data indicate that with increase in load, stress exponent increases from one to seven. The activation energy for creep varies from 340kJ/mol to 455kJ/mol in the temperature range investigated. Creep data of these alloys were analyzed using several theoretical models.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1155
Copyright
Copyright © Materials Research Society 1995

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References

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