Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-02-11T10:24:36.687Z Has data issue: false hasContentIssue false
  • English
  • Français

Flow Behavior of the Ll2 (Al,Fe)3Ti Single Crystals

Published online by Cambridge University Press:  01 January 1992

Z.L. Wu ,
D.P. Pope  and
V. Vitek
Z.L. Wu
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6202.
D.P. Pope
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6202.
V. Vitek
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6202.
Get access

Abstract

The compressive flow behavior of single crystalline LI2 Al67FegTi25 was investigated as a function of temperature and orientation at temperatures from 77K to about 1250K, using specimens with compressive axes orientated near [001], [113], [011], [122] and [111]. The operating slip systems seen in these specimens after 0.4% plastic deformation are predominantly of the octahedral type at all temperatures, even in near-[122] and [111] specimens in which the Schmid factors for the primary cube slip system are larger than that for the primary octahedral slip system. The yield stress increases rapidly with decreasing temperature at low temperatures, while it decreases gradually from room temperature to higher temperatures. The critical resolved shear stress (CRSS) on the [101](111) slip system does not seem to be orientation-dependent over a wide range of temperatures, except at temperatures from 1050K to 1250K where the CRSS exhibits a mild orientation-dependence. Fracture tests at room temperature were also conducted. No special orientation-dependence of the ductility was observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 447
Copyright
Copyright © Materials Research Society 1995

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. Kumar, K.S. and Pickens, J.R., Scrip. Metall., 22, 1015, 1988.Google Scholar
2. Zhang, S., Nic, J.P., Milligan, W.W., and Mikkola, D.E., Scrip. Metall., 24, 57, 1990.Google Scholar
3. Mabuchi, H., Hirukawa, K. and Makayama, Y., Scrip. Metall., 23, 1761, 1989.Google Scholar
4. Winnicha, M.B., and Varin, R.A., Scrip. Metall., 24, 611, 1990.Google Scholar
5. Wu, Z.L., Pope, D.P., and Vitek, V., High Temperature Ordered Intermetallic Alloys, IV, (ed. by Johnson, L., Pope, D.P., and Stiegler, J.O.), MRS Symp. 213, MRS Pittsburgh, 487, 1991.Google Scholar
6. Wu, Z.L., Pope, D.P., and Vitek, V., Scrip. Metall., 24, 2187, 1990.Google Scholar
7. Wu, Z.L., Pope, D.P., and Vitek, V., Scrip. Metall., 24, 2191, 1990.Google Scholar
8. Wee, D.M., Pope, D.P., and Vitek, V., Acta Metall., 32, No.6, 829, 1984.Google Scholar
9. Kumar, K.S., Brown, S.A., and Whittenberger, J.D., High Temperature Ordered Intermetallic Alloys. IV, (ed. by Johnson, L., Pope, D.P., and Stiegler, J.O.), MRS Symp., 213, MRS Pittsburgh, 481, 1991.Google Scholar
10. George, E.P., Horton, J.A., Porter, W.D., and Schneibel, J.H., J. Mater. Res., 5, 1639, 1990.Google Scholar
11. Morris, D.G., Scrip. Metall. 25, 713, 1991.Google Scholar
12. Kumar, K.S., Brown, S.A., Philos. Mag.A, 65, No.l, 91, 1992.Google Scholar
13. Inui, H., Luzzi, D. E., Porter, W. D., Pope, D. P., Vitek, V., and Yamaguchi, M., Phil. Mag. A, 65, No. 1, 245, 1992.Google Scholar
14. Paidar, V., Pope, D.P., and Vitek, V., Acta Metall., 32, 435, 1984.Google Scholar
15. Mulford, R.A., Pope, D.P., Acta Metall., 21, 1375, 1973.Google Scholar
16. Wee, D.M. and Suzuki, T., Trans. Japan Inst. Metals, 20, 634, 1979.Google Scholar
17. Wu, Z.L., Pope, D.P., and Vitek, V., submitted to this symposium.Google Scholar
18. Wu, Z.L., Ph.D thesis, University of Pennsylvania, 1992.Google Scholar
19. Vitek, V., Khantha, M., Cserti, J. and Sodani, Y., Proc. JIMIS-6, 1991.Google Scholar
20. Potez, L., Loiseau, A., Naka, S. and Lapasset, G., J. Mater. Res., 7, No. 4, 876, 1992.Google Scholar
21. Potez, L., Lapasset, G., and Kubin, L. P., Scrip. Metall., 26, 841, 1992.Google Scholar