Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-24T14:46:54.519Z Has data issue: false hasContentIssue false
  • English
  • Français

Texture Formation of α2-Ti3Al during Hot Forming of γ-TiAl Based Alloys

Published online by Cambridge University Press:  18 January 2011

Andreas Stark ,
Daniel Gosslar  and
Nikolai Pashkov
Andreas Stark
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Max-Planck-Str. 1, D-21502 Geesthacht, Germany
Daniel Gosslar
Affiliation:
Institute of Materials Science and Technology, Hamburg University of Technology, Eißendorfer Str. 42, D-21073 Hamburg, Germany
Nikolai Pashkov
Affiliation:
Institute of Materials Science and Technology, Hamburg University of Technology, Eißendorfer Str. 42, D-21073 Hamburg, Germany
Get access

Abstract

In the present study the α2 and the γ texture in a Ti-45Al (at.%) alloy were analyzed by means of x-ray diffraction after hot deformation. The initial Ti-45Al powder compact exhibits a random texture and shows a relatively high amount of α2 phase (about 34 vol.%). Various hot compression tests were performed at temperatures ranging from 700 °C to 1100 °C with strain rates of 5·10–4 s–1 and 5·10–2 s–1 up to a true deformation of ε = –1.

Depending on the deformation temperature the γ-TiAl deformation texture consists of pure deformation components (700 °C) or components completely related to dynamic recrystallization (1100 °C). In contrast to the γ phase the α2 phase shows no remarkable changing of the deformation texture with increasing temperature. The α2 deformation texture basically consists of a similar component as it is known from hexagonal α-Ti, namely a tilted basal fiber. However, a significant influence of the deformation rate on the α2 texture formation is observed at temperatures above 800 °C. With increasing deformation temperature the α2 texture strengthens by applying a high deformation rate, whereas it weakens for a low deformation rate. This contrary behavior is attributed to the interaction of the α2 and γ phases during texture formation.

Keywords

texturex-ray diffraction (XRD)forging
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1295: Symposium N – Intermetallic-Based Alloys for Structural and Functional Applications , 2011 , mrsf10-1295-n05-15
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. Structural Aluminides for Elevated Temperature Applications, edited by Kim, Y.-W., Morris, D., Yang, R. and Leyens, C. (TMS, Warrendale, PA, USA, 2008).Google Scholar
2. Kestler, H. and Clemens, H., in Titanium and Titanium Alloys, edited by Leyens, C. and Peters, M. (Wiley-VCH, Weinheim, Germany, 2003) p. 351.Google Scholar
3. Schillinger, W., Lorenzen, B. and Bartels, A., Mater. Sci. Eng. A 329-331, 644 (2002).Google Scholar
4. Bystrzanowski, S., Bartels, A., Stark, A., Gerling, R., Schimansky, F.-P. and Clemens, H., Intermetallics 18, 1046 (2010).Google Scholar
5. Stark, A., Schimansky, F.-P. and Clemens, H., in Texture and Anisotropy of Polycrystals III, edited by Klein, H. and Schwarzer, R.A. (Solid State Phenom. 160, Trans Tech Publications, Switzerland, 2010) p. 301.Google Scholar
6. Stark, A., Textur- und Gefügeentwicklung bei der thermomechanischen Umformung Nb-reicher Gamma-TiAl-Basislegierungen (Shaker Verlag, Germany, 2010).Google Scholar
7. Gerling, R., Schimansky, F.-P., Stark, A., Bartels, A., Kestler, H., Cha, L., Scheu, C. and Clemens, H., Intermetallics 16, 689 (2008).Google Scholar
8. Oehring, M., Appel, F., Brokmeier, H.-G. and Lorenz, U., in Integrative and Interdisciplinary Aspects of Intermetallics, edited by Mills, M. J., Inui, H., Clemens, H. and Fu, C. (Mater. Res. Soc. Proc. 842, Warrendale, PA, USA, 2005) p. 223.Google Scholar
9. Bartels, A. and Schillinger, W., Intermetallics 9, 883 (2001).Google Scholar
10. Schillinger, W., Bartels, A., Gerling, R., Schimansky, F.-P. and Clemens, H., Intermetallics 14, 336 (2006).Google Scholar
11. Stark, A., Bartels, A., Gerling, R., Schimansky, F.-P. and Clemens, H., Adv. Eng. Mater. 8, 1101 (2006).Google Scholar
12. Stark, A., Bartels, A., Clemens, H., Kremmer, S., Schimansky, F.-P. and Gerling, R., Adv. Eng. Mater. 11, 976 (2009).Google Scholar
13. Dahms, M. and Bunge, H. J., J. Appl. Crystallogr. 22, 439 (1989).Google Scholar
14. Wenk, H., Matthies, S., Donovan, J. and Chateigner, D., J. Appl. Crystallogr. 31, 262 (1998).Google Scholar
15. Wassermann, G. and Grewen, J.: Texturen metallischer Werkstoffe (Springer, Berlin, 1962) p. 286.Google Scholar