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Hot Extrusion of A Ti-Al-Nb-Mn Alloy

Published online by Cambridge University Press:  26 February 2011

V. Seetharaman ,
J. C. Malas  and
C. M. Lomibard
V. Seetharaman
Affiliation:
Universal Energy Systems, Inc., Processing Science Division, Dayton, OH 45432
J. C. Malas
Affiliation:
WRDC/MLLN, Wright-Patterson Air Force Base, OH 45433
C. M. Lomibard
Affiliation:
WRDC/MLLN, Wright-Patterson Air Force Base, OH 45433
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Abstract

Forward extrusion of a gamma-TiAl alloy (Ti-49.5A1-2.5Nb-l.lMn) was investigated, with special reference to the role of preheat temperature, ram velocity, and can material. Cylindrical billets were sealed in evacuated cans, soaked at extrusion temperatures ranging from 1050 to 1350°C for 2 hr and then extruded through streamlined dies held at 260°C. Microstructural features of the extruded billets which evolved under steady-state conditions were characterized. In conjunction with these observations, a coupled (thermal-deformation) finite-element analysis procedure was used to predict the local distributions of strain, strain rate, temperature, and stress present during extrusion. The microstructures of the extruded products are compared with those obtained in samples subjected to isothermal constant-strain-rate compression tests.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 889
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. McQueen, H. J. and Jonas, J., in Treatise in Materials Science and Technology, edited by Arsenault, R. J. (Academic Press, New York, 1975), pp. 393–493.Google Scholar
2. Gandhi, C., Metall. Trans. A 13A, 1233 (1982).CrossRefGoogle Scholar
3. Lipsitt, H. A., in High Temperature Ordered Intermetallics. edited by Koch, C.C., et al. . (Mater. Res. Soc. Proc. 39, Pittsburgh, PA, 1985), pp. 351–364.Google Scholar
4. Roberts, W., in Proceedings of the 7th International Conference on Strength of Metals and Alloys (Montreal, Canada, 1985), edited by McQueen, H. J., Bailon, J. P., Dickson, J. I., Jonas, J. J., and Akben, M. J. (Pergamon Press, New York, 1985), pp. 185991.Google Scholar
5. Oh, S. I., Int. J. Mech. Sci. 24, 179 (1982).CrossRefGoogle Scholar
6. Seetharaman, V. and Lombard, C. M., in Proceedings of Microstructure/Property Relationships in Titanium Alloys and Titanium Aluminides (Detroit, MI, 1990) (The Metallurgical Society, Warrendale, PA) (in press).Google Scholar