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Dislocation Structure in Single Crystal L1o Type Ti-Al-V Compound

Published online by Cambridge University Press:  26 February 2011

Y.D. Hahn
Affiliation:
Department of Metallurgy and Materials Science, Polytechnic University, Brooklyn, NY 11201;
Z.X. Li
Affiliation:
Department of Metallurgy and Materials Science, Polytechnic University, Brooklyn, NY 11201;
S.H. Whang
Affiliation:
Department of Metallurgy and Materials Science, Polytechnic University, Brooklyn, NY 11201;
T. Kawabata
Affiliation:
Sumitomo Light Metals Industries, Ltd., Chitose, Minato-Ku, Nagoya, 455, Japan.
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Abstract

Single Crystals of L1o type Ti44Al54V2 alloy were deformed at high temperatures and various orientations. The dislocations thus produced by single slip were studied by TEM. 1/2<110] dislocations produced at 1073 K consist of dislocation loops and curled dislocations with spiral segments, which is in agreement with those shown in the polycrystalline Ti-Al-V, and -Nb alloys deformed under the same conditions. The normal dislocations produced at 873 K pile up in groups, each of which contains several straight dislocations with a screw character. On the other hand, the majority of superdislocations produced at 873 K were found in a dipole form, indicating that the dipole is a favorable configuration at this temperature.

Type
Research Article
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Whang, S.H. and Hahn, Y.D., in High Temperature Aluminides & Intermetallics pp. 91–109, Whang, S.H., Liu, C.T., Pope, D.P. and Stiegler, J.O. Eds., TMS Inc (1990).Google Scholar
2. Kawabata, T., Kanai, T. and Izumi, O., Acta Met., 33, 135566(1985).Google Scholar
3. Whang, S.H. and Hahn, Y.D., Scripta Met., 24, 485490 (1990).Google Scholar
4. Hahn, Y.D. and Whang, S.H., Submitted to Met. Trans. A. (1990).Google Scholar
5. Hug, G., Loiseau, A. and Lasalmonie, A., Phil. Mag. A, 57 499523 (1988).CrossRefGoogle Scholar
6. Hahn, Y.D. and Whang, S.H., Scripta Met., 24 139144 (1990).Google Scholar
7. Hahn, Y.D. and Whang, S.H., to be submitted to Phil. Mag.Google Scholar
8. Kawabata, T., Abumiya, T., Kanai, T. and Izumi, O., Acta Metall., 38 138193(1990).Google Scholar
9. Fu, C.L. and Yoo, M.H., Phil. Mag. Lett., 62 159165 (1990).Google Scholar