Hostname: page-component-77c89778f8-5wvtr Total loading time: 0 Render date: 2024-07-18T07:37:09.233Z Has data issue: false hasContentIssue false
  • English
  • Français

Plastic Deformation of Ni3Nb Single Crystals

Published online by Cambridge University Press:  10 February 2011

Kouji Hagihara ,
Takayoshi Nakano  and
Yukichi Umakoshi
Kouji Hagihara
Affiliation:
Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-087 1, Japan
Takayoshi Nakano
Affiliation:
Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-087 1, Japan
Yukichi Umakoshi
Affiliation:
Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-Oka, Suita, Osaka 565-087 1, Japan
Get access

Abstract

Temperature dependence of yield stress and operative slip system in Ni3Nb single crystals with the DOa structure was investigated in comparison with that in an analogous L12 structure. Compression tests were performed at temperatures between 20 °C and 1200 °C for specimens with loading axes perpendicular to (110), (331) and (270).

(010)[100] slip was operative for three orientations, while (010)[001] slip for (331) and {211} <10 7 13> twin for (270) orientations were observed, depending on deformation temperature. The critical resolved shear stress (CRSS) for the (010)[100] slip anomaly increased with increasing temperature showing a maximum peak between 400 °C and 800 °C depending on crystal orientation. The CRSS showed orientation dependence and no significant strain rate dependence in the temperature range for anomalous strengthening. The [100] dislocations with a screw character were aligned on the straight when the anomalous strengthening occurred. The anomalous strengthening mechanism for (010)[100] slip in Ni3Nb single crystals is discussed on the basis of a cross slip model which has been widely accepted for some L12-type compounds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK10.7.1
Copyright
Copyright © Materials Research Society 1999

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. Quinn, R.T., Kraft, R.W. and Hertzberg, R.W., Trans. ASM, 62, 38 (1969).Google Scholar
2. Thompson, E.R. and Lemkey, E.D., Trans. ASM, 62, 140 (1969).Google Scholar
3. Hoover, W.R. and Hertzberg, R.W., Met. Trans., 2, 1283 (1971).CrossRefGoogle Scholar
4. Annarumma, P. and Turpin, M., Met. Trans., 3, 137 (1972).CrossRefGoogle Scholar
5. Grossiord, C., Lesoult, G. and Turpin, M., Electron Microscopy and Structure of Materials, Edited by Thomas, G., Fulrath, R.M. and Fischer, R.W., Berkeley, 678 (1972).CrossRefGoogle Scholar
6. Sheffler, K.D., Barkalow, R.H., Yuen, A. and Leverant, G.R., Met.Trans. A, 8A, 83 (1977).CrossRefGoogle Scholar
7. Bhowal, P.R. and Metzger, M., Met. Trans. A, 9A, 1027 (1978).CrossRefGoogle Scholar
8. Bhowal, P.R., Prewo, K.M. and McEvily, A.J., Met. Trans. A, 9A, 747 (1978).CrossRefGoogle Scholar
9. Fukuchi, M. and Watanabe, K., Trans. Jap. Inst. Metals, 27, 434 (1986).CrossRefGoogle Scholar
10. Yamaguchi, M. and Umakoshi, Y., Progress in Materials Science, 34, 26 (1990).CrossRefGoogle Scholar
11. Hayashi, Y., Delavignette, P. and Amelinckx, S., phys. stat. sol., 42, 637 (1970).CrossRefGoogle Scholar
12. Takeuchi, S. and Kuramoto, E., Acta Metall., 21, 415 (1973).CrossRefGoogle Scholar
13. Pope, D.P. and Ezz, S.S., Int. Metals Reviews, 29, 136 (1984)Google Scholar