Effects of texture on the superplasticity of Ti-25Al-10Nb alloy

After a series of thermomechanical processes of high temperature rolling and annealing, the titanium aluminide Ti 3AlNb alloy exhibits a structure of sharp texture. The objective of this study is to probe into the relationship between the rolling texture and the superplasticity of the Ti 3AlNb all...

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Bibliographic Details
Published in:Intermetallics 1997, Vol.5 (1), p.29-36
Main Authors: Wu, Y.T., Koo, C.H.
Format: Article
Language:English
Subjects:
A. titanium aluminides
B. superplastic behaviour
based on Ti 3Al
C. rolling
texture
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Summary:After a series of thermomechanical processes of high temperature rolling and annealing, the titanium aluminide Ti 3AlNb alloy exhibits a structure of sharp texture. The objective of this study is to probe into the relationship between the rolling texture and the superplasticity of the Ti 3AlNb alloy. The experimental results indicate that the preferred orientation of the rolling texture is along the rolling direction. The superplasticity of the textured Ti 3AlNb alloy is better than that of the non-textured Ti 3AlNb alloy. By measuring the superplasticity of the specimens with different elongated direction, (i.e. parallel to the rolling texture, at 45 ° to the rolling texture, and perpendicular to the rolling texture), it is found that the specimen elongated along the rolling direction has the highest superplasticity. It is concluded that the rolling texture will promote the superplasticity of the Ti 3AlNb alloy and the textured Ti 3AlNb alloy will exhibit anisotropic superplasticity.
ISSN:0966-9795
1879-0216
DOI:10.1016/S0966-9795(96)00062-3