Hostname: page-component-5c6d5d7d68-qks25 Total loading time: 0 Render date: 2024-08-19T06:21:02.138Z Has data issue: false hasContentIssue false
  • English
  • Français

Plastic Anisotropy of Ti3Al Single Crystals

Published online by Cambridge University Press:  01 January 1992

Y. Umakoshi ,
T. Nakano ,
K. Sumimoto  and
Y. Maeda
Y. Umakoshi
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565, Japan
T. Nakano
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565, Japan
K. Sumimoto
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565, Japan
Y. Maeda
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565, Japan
Get access

Abstract

The orientation and temperature dependence of the operative slip systems and critical resolved shear stress (CRSS) were investigated in Ti3Al single crystals containing 24.4at%Al and 33.0at%Al. Prism {1010}<1210> slip occurs preferentially in comparison with basal (0001)<1210> and pyramidal {1121}<1126> slip. The CRSS for prism and basal slip decreases with increasing temperature, while that for pyramidal slip exhibits positive temperature dependence having an anomalous peak around 500°C. The temperature dependence of the CRSS for these slip systems does not strongly depend on Al content. The ductility of Ti3Al single crystals is influenced by operative slip systems. Coarse slip bands on the basal plane often act as a trigger for crack nucleation. The compositional deviation to the Al-rich side is harmful for ductility of Ti3Al alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 441
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. Minonishi, Y. and Yoo, M.H., Phil. Mag. Lett. 61, 203(1990).Google Scholar
2. Minonishi, Y., Phil. Mag. 63A, 1085(1991).Google Scholar
3. Umakoshi, Y., Nakano, T., Takenaka, T., Sumimoto, K. and Yamane, T., Acta Met. et Mater, in press.Google Scholar
4. McAndrew, J.B. and Kessler, H.D., J. Met. 8, 1348(1956).Google Scholar
5. Lipsitt, H.A., Shechtman, D. and Schafrik, R.E., Met. Trans. 6A, 1991(1975).Google Scholar
6. Fujiwara, T., Nakamura, A., Hosomi, M., Nishitani, S.R., Shirai, Y. and Yamaguchi, M., Phil. Mag. 61A, 591(1990).Google Scholar
7. Nishitani, S.R., Oh, M.H., Nakamura, A., Fujiwara, T. and Yamaguchi, M., J. Mater. Res. 5, 484(1990).Google Scholar
8. Inui, H., Nakamura, A., Oh, M.H. and Yamaguchi, M., Proc. of Inter. Sympo. on Intermetallic Compounds-Structure and Mechanical Properties- (edited by Izumi, O.), p.495 (1991), Japan Inst, of Metals, Sendai.Google Scholar
9. Umakoshi, Y., Nakano, T. and Yamane, T., Mater. Sci. and Engn. 152A, 81(1992).Google Scholar
10. Umakoshi, Y. and Nakano, T.,ISIJ Inter. 32, 1339(1992).Google Scholar
11. Umakoshi, Y. and Nakano, T., Acta Met. et Mater, in press.Google Scholar
12. Nakano, T., Sumimoto, K. and Umakoshi, Y., Proc. 1992 Tokyo Meeting Japan Inst, of Metals, Sendai, the Japan Inst, of Metals, p.343(1992).Google Scholar
13. Vitek, V., Khantha, M., Cserti, J. and Sodani, Y., Proc. of Inter. Sympo. on Intermetallic Compounds-Structure and Mechanical Properties- (edited by Izumi, O.), p.3 (1991), Japan Inst, of Metals, Sendai.Google Scholar
14. Nakano, T. and Umakoshi, Y., Proc. 1992 Toyama Meeting Japan Inst, of Metals, Toyama, the Japan Inst, of Metals, p.288(1992).Google Scholar