Hostname: page-component-8448b6f56d-t5pn6 Total loading time: 0 Render date: 2024-04-19T11:40:07.833Z Has data issue: false hasContentIssue false
  • English
  • Français

SANS Study of Carbon Addition in Ti–45Al–5Nb

Published online by Cambridge University Press:  09 March 2011

P. Staron ,
F.-P. Schimansky ,
C. Scheu  and
H. Clemens
P. Staron
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max Planck-Str. 1, 21502 Geesthacht, Germany
F.-P. Schimansky
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max Planck-Str. 1, 21502 Geesthacht, Germany
C. Scheu
Affiliation:
Department of Chemistry, Ludwig-Maximilians-University of Munich, Butenandtstr. 5–13, 81377 Munich, Germany
H. Clemens
Affiliation:
Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Roseggerstr. 12, 8700 Leoben, Austria
Get access

Abstract

The distribution of carbon in Ti–45Al–5Nb–0.5C was studied using small-angle neutron scattering (SANS). In an earlier study, carbon had been found to form small perovskite precipitates in a γ-TiAl alloy without Nb, which significantly increase the strength of the material. In the Nb-containing alloy, however, no strengthening precipitates were observed, but most of the C was found to be homogeneously distributed. Atom probe investigations revealed only few C-enriched regions. The present SANS investigation was carried out to confirm the presence and size distribution of these C-enriched regions in the material. The SANS results show that a small volume fraction of such C-enriched regions is present, while the large number of small precipitates found in the alloy without Nb is indeed missing in the Nb-containing alloy.

Keywords

neutron scatteringsecond phasesstrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1295: Symposium N – Intermetallic-Based Alloys for Structural and Functional Applications , 2011 , mrsf10-1295-n05-16
Copyright
Copyright © Materials Research Society 2011

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. Kim, Y.W., Clemens, H., Rosenberger, A.H., Gamma titanium aluminides (TMS, Warrendale, PA, 2003).Google Scholar
2. Kestler, H., Clemens, H., in Titanium and titanium alloys, edited by Leyens, C., Peters, M. (Wiley-VCH GmbH, Weinheim, 2003) p. 351.Google Scholar
3. Kim, Y.W., Morris, D., Yang, R., Leyens, C., Structural aluminides for elevated temperature applications (TMS, Warrendale, PA, 2008).Google Scholar
4. Scheu, C., Stergar, E., Schober, M., Cha, L., Clemens, H., Bartels, A., Schimansky, F.-P., Cerezo, A., Acta Materialia 57, 1504 (2009).Google Scholar
5. Christoph, U., Appel, F., Wagner, R.: Mater. Sci. Eng. A 239, 39 (1997).Google Scholar
6. Staron, P., Christoph, U., Appel, F., Clemens, H., Appl. Phys. A 74, S1163 (2002).Google Scholar
7. Chen, G.L., Zhang, W.J., Liu, C.Z., Li, S.J., Kim, Y.-W., in Gamma titanium aluminides, edited by Kim, Y.-W., Loretto, M.H. (TMS, Warrendale, PA, 1999) p. 371.Google Scholar
8. Appel, F., Oehring, M., Wagner, R.. Intermetallics 8, 1283 (2000).Google Scholar
9. Zhang, W.J., Deevi, S.C., Chen, G.L.. Intermetallics 10, 403 (2002).Google Scholar
10. Gerling, R., Schimansky, F.-P., Stark, A., Bartels, A., Kestler, H., Cha, L., Intermetallics 16, 689 (2008).Google Scholar
11. Kostorz, G., in Treatise on Materials Science and Technology, Vol. 15: Neutron Scattering, edited by Kostorz, G., Herman, H. (Wiley-VCH, Weinheim, 1979) p. 227.Google Scholar
12. Guinier, A., Fournet, G., Small-angle Scattering of X-rays (John Wiley & Sons, New York, 1955).Google Scholar
13. Tian, W.H., Sano, T., Nemoto, M., Phil. Mag. A 68, 965 (1993).Google Scholar
14. Chen, S., Beaven, P.A., Wagner, R., Scripta Met. Mater. 26, 1205 (1992).Google Scholar