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Effect of Ternary Additions on the Microstructural Stability and Oxidation Characteristics of Ti-48 Al

Published online by Cambridge University Press:  01 January 1992

S. A. Kekare ,
D. K. Shelton  and
P. B. Aswath
S. A. Kekare
Affiliation:
Department of Mechanical & Aerospace Engineering and Materials Science & Engineering Program, University of Texas at Arlington
D. K. Shelton
Affiliation:
Department of Mechanical & Aerospace Engineering and Materials Science & Engineering Program, University of Texas at Arlington
P. B. Aswath
Affiliation:
Department of Mechanical & Aerospace Engineering and Materials Science & Engineering Program, University of Texas at Arlington
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Abstract

Oxidation behavior of binary Ti-48 Al and ternary alloys with 1.5 at.% Cr, 1.4 at.%Mn, 0.2 at.% W, 2.2 at% V, 20 vol.% TiNb particles were examined in an air atmosphere at 704°C, 815°C and 982°C. Results indicate that the addition of Cr is detrimental at all temperatures. The Cr and V containing alloys exhibited a linear oxidation behavior at 815°C while the Mn containing alloy showed a linear behavior at 982°C. At 982 °C the alloys with W and V exhibit the best oxidation behavior. The mechanism of oxidation has been explained with the help of a simple vacancy model for oxygen diffusion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1025
Copyright
Copyright © Materials Research Society 1995

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References

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