Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-27T02:29:34.987Z Has data issue: false hasContentIssue false
  • English
  • Français

Solution and Precipitation Hardening in Carbon-Doped Two-Phase γ-Titanium Aluminides

Published online by Cambridge University Press:  15 February 2011

F. Appel ,
U. Christoph  and
R. Wagner
F. Appel
Affiliation:
Institute for Materials Research, GKSS Research Center, Max-Planck-Str., D-21502 Geesthacht, Germany
U. Christoph
Affiliation:
Institute for Materials Research, GKSS Research Center, Max-Planck-Str., D-21502 Geesthacht, Germany
R. Wagner
Affiliation:
Institute for Materials Research, GKSS Research Center, Max-Planck-Str., D-21502 Geesthacht, Germany
Get access

Abstract

A two-phase titanium aluminide alloy was systematically doped with carbon to improve its high temperature strength. Solid solutions and precipitates of carbon were formed by different thermal treatments. A fine dispersion of perovskite precipitates was found to be very effective for improving the high temperature strength and creep resistance of the material. The strengthening mechanisms were characterized by flow stresses and activation parameters. The investigations were accompanied by electron microscope observation of the defect structure which was generated during deformation. Special attention was paid on the interaction mechanisms of perfect and twinning dislocations with the carbide precipitates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 77
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Dimiduk, D.M. in Gamma Titanium Aluminides, edited by Kim, Y.-W., Wagner, R. and Yamaguchi, M., (TMS, Warrendale, PA, 1995), p. 3.Google Scholar
2. Kim, Y.-W. in Gamma Titanium Aluminides. edited by Kim, Y.-W., Wagner, R. and Yamaguchi, M., (TMS, Warrendale, PA, 1995), p. 637.Google Scholar
3. Wagner, R., Appel, F., Dogan, B., Ennis, P.J., Lorenz, U., Müllauer, J., Nicolai, H.P., Quadakkers, W., Singheiser, L., Smarsly, W., Vaidya, W., and Wurzwallner, K. in Gamma Titanium Aluminides. edited by Kim, Y.-W., Wagner, R. and Yamaguchi, M., (TMS, Warrendale, PA, 1995), p. 387.Google Scholar
4. Appel, F., Sparka, U. and Wagner, R. in High-Temperature Ordered Intermetallic Alloys VI. edited by Horton, J., Baker, I., Hanada, S., Noebe, R.D., and Schwartz, D.S., (Mater. Res. Soc. Symp. Proc. 364, Pittsburgh, PA, 1995), p. 623.Google Scholar
5. Appel, F., Lorenz, U., Oehring, M., Sparka, U., and Wagner, R., accepted by Mater. Sci. Engng. A.Google Scholar
6. Schock, G., Phys. Stat. Sol. 8, 499 (1965).Google Scholar
7. Evans, A.G. and Rawlings, R. W., Phys. Stat. Sol. 34, 9 (1969).Google Scholar
8. Tian, W., Sano, T. and Nemoto, M., Phil. Mag. A68, 965 (1993).Google Scholar
9. Chen, S., Beaven, P.A. and Wagner, R., Scripta Metall. Mater. 26, 1205 (1992).Google Scholar
10. DeWitt, G. and Koehler, J.S., Phys. Rev. 116, 1113 (1995).Google Scholar
11. Hirth, J.P. and Lothe, J., Theory of Dislocations, second edition (Krieger Publishing Company, Malabar, 1992) p. 157.Google Scholar
12. Schafrik, R.E., Metall. Trans. A 8A, 1003 (1977)Google Scholar