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Texture Formation in High Niobium Containing TiAl Alloys

Published online by Cambridge University Press:  26 February 2011

Andreas Stark ,
Arno Bartels ,
Frank-Peter Schimansky  and
Helmut Clemens
Andreas Stark
Affiliation:
stark@tu-harburg.deHamburg University of TechnologyInstitute of Materials Science and TechnologyEißendorfer Str. 42Hamburg D-21073Germany
Arno Bartels
Affiliation:
bartels@tu-harburg.de, Hamburg University of Technology, Institute of Materials Science and Technology, Eißendorfer Str. 42, Hamburg, D-21073, Germany
Frank-Peter Schimansky
Affiliation:
Frank-Peter.Schimansky@gkss.de, GKSS-Research Centre, Institute for Materials Research, Max-Plank-Str. 1, Geesthacht, D-21502, Germany
Helmut Clemens
Affiliation:
helmut.clemens@unileoben.ac.at, Montanuniversität Leoben, Department of Physical Metallurgy and Materials Testing, Franz-Josef-Str. 18, Leoben, A-8700, Austria
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Abstract

Texture formation was studied in high Nb bearing g-TiAl based alloys with compositions of Ti-45Al-(5,7.5,10)Nb-(0,0.5)C (compositions are in atomic percent). In order to start with texture-free material hot-isostatically pressed powder compounds were used. The deformation was performed either in uniaxial compression or by hot rolling. After compression at 700 °C and 800 °C fiber textures with <110> and <302> components occur. These deformation textures can be verified by computer simulations using a yield surface model of g-TiAl. With higher deformation temperatures the <110> fiber vanishes and new accumulations of orientations are formed, which are due to dynamic recrystallization.

Hot rolling was performed at temperatures in the upper part of the (a+g) phase field and, therefore, with more than 50% a-phase existing. The co-deformation of a- and g-phase during rolling leads to correlated components in the independently measured textures of both phases. The texture of the g-phase shows a maximum of orientation around the Goss2 component and the texture of the a-phase exhibits an orientation maximum around the transversal component. The correlation is the Blackburn orientation relation, although the textures are not caused by phase transformations, but by co-deformation. Hot rolling with many passes and reheating between the passes lead to the formation of a cube component with an alignment of the c-axes in transverse direction. In general, this is a typical recrystallization-induced component in hot rolled TiAl.

Keywords

texturex-ray diffraction (XRD)Nb
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II07-01
Copyright
Copyright © Materials Research Society 2007

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References

1. Kestler, H. and Clemens, H., in Titanium and Titanium Alloys, edited by Leyens, C. and Peters, M. 1/21/2011 3:08PM(Wiley-VCH, Weinheim, Germany, 2003), pp. 351–392.Google Scholar
2. Appel, F., Oehring, M., Paul, J. D. H. and Lorenz, U., in Structural Intermetallics 2001, edited by Hemker, K., Dimiduk, D., Clemens, H., Darolia, R., Inui, H., Larsen, J., Sikka, V., Thomas, M. and Whittenberger, J. (TMS, Warrendale, PA, USA, 2001), pp. 63–72.Google Scholar
3. Gerling, R., Bartels, A., Clemens, H., Kestler, H. and Schimansky, F.-P., Intermetallics 12, 275–280 (2004).Google Scholar
4. Bystrzanowski, S., Bartels, A., Clemens, H., Gerling, R., Schimansky, F.-P., Dehm, G. and Kestler, H., Intermetallics 13, 515–524 (2005).Google Scholar
5. Appel, F., Brossmann, U., Christoph, U., Eggert, S., Janschek, P., Lorenz, U., Müllauer, J., Oehring, M. and Paul, J., Advanced Engineering Materials 2, 699–720 (2000).Google Scholar
6. Schillinger, W., Lorenzen, B. and Bartels, A., Materials Science and Engineering A 329–331, 644–648 (2002).Google Scholar
7. Bartels, A., Schillinger, W., Grassl, G. and Clemens, H., in Gamma Titanium Aluminides 2003, edited by Kim, Y., Clemens, H. and Rosenberger, A. H. (TMS, Warrendale, PA, USA, 2003), pp. 275–286.Google Scholar
8. Fukotomi, H., Nomoto, A., Osuga, Y., Ikeda, S. and Mecking, H., Intermetallics 4, 49–55 (1996).Google Scholar
9. Inoue, H. and Inakazu, N., in Proceedings of the Eleventh International Conference on Textures of Materials (ICOTOM-11), edited by Liang, Z., Zuo, L. and Chu, Y. (International Academic Publishers, Xi'an, China, 1996), pp. 1495–1550.Google Scholar
10. Schillinger, W., Bartels, A., Gerling, R. and Clemens, H., in Ti-2003: Science and Technology, edited by Lütjering, G. and Albrecht, J. (Wiley-VCH, 2004), pp. 2385–2392.Google Scholar
11. Brokmeier, H., Oehring, M., Lorenz, U., Clemens, H. and Appel, F., Metallurgical and Materials Transactions A 35, 3563–3579 (2004).Google Scholar
12. Schillinger, W., Bartels, A., Gerling, R., Schimansky, F.-P. and Clemens, H., Intermetallics 14, 336–347 (2006).Google Scholar
13. Stark, A., Bartels, A., Gerling, R., Schimansky, F.-P. and Clemens, H., Advanced Engineering Materials 8, 1087–1095 (2006).Google Scholar
14. Bendersky, L., Boettinger, W., Burton, B., Biancaniello, F. and Shoemaker, C., Acta Metallurgica et Materialia 38, 931–943 (1990).Google Scholar
15. Chladil, H. F., Clemens, H., Leitner, H., Bartels, A., Gerling, R., Schimansky, F.-P. and Kremmer, S., Intermetallics 14, 1194–1198 (2006).Google Scholar
16. Dahms, M. and Bunge, H. J., Journal of Applied Crystallography 22, 439–447 (1989).Google Scholar
17. Wenk, H., Matthies, S., Donovan, J. and Chateigner, D., Journal of Applied Crystallography 31, 262–269 (1998).Google Scholar
18. Bartels, A. and Schillinger, W., Intermetallics 9, 883–889 (2001).Google Scholar
19. Appel, F. and Wagner, R., Materials Science and Engineering R 22, 187–268 (1998).Google Scholar
20. Wassermann, G. and Grewen, J., Texturen metallischer Werkstoffe (Springer, Berlin, 1962), p. 286.Google Scholar
21. Appel, F., Oehring, M. and Wagner, R., Intermetallics 8, 1283–1312 (2000).Google Scholar
22. Kocks, U. F., Tome, C. N. and Wenk, H., Texture and Anisotropy (Cambridge University Press, New York, UK, 2000), p. 185.Google Scholar
23. Singh, A. and Schwarzer, R., Zeitschrift für Metallkunde 91, 702–716 (2000).Google Scholar
24. Dunst, D. and Mecking, H., Zeitschrift für Metallkunde 87, 498–507 (1996).Google Scholar