Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-28T22:22:02.203Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Dislocation Sources on Slip in Fe2Nb Laves Phase with Ni in Solution

Published online by Cambridge University Press:  29 November 2012

N. Takata ,
H. Ghassemi-Armaki ,
Y. Terada ,
M. Takeyama  and
S. Kumar
N. Takata
Affiliation:
Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
H. Ghassemi-Armaki
Affiliation:
School of Engineering, Brown University, Providence, RI 02912, U.S.A.
Y. Terada
Affiliation:
Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
M. Takeyama
Affiliation:
Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
S. Kumar
Affiliation:
School of Engineering, Brown University, Providence, RI 02912, U.S.A.
Get access

Abstract

We have examined the compression response of a ternary Fe2Nb Laves phase by deforming micropillars with a diameter of ~2 μm produced by focused ion beam milling from a two-phase Fe-15Nb-40Ni (at.%) ternary alloy consisting of the Laves phase and γ-Fe. The Laves phase micropillars exhibit high strength of about 6 GPa (of the order of the theoretical shear strength of the material), followed by a burst of plastic strain and shear failure on the basal plane. If dislocation sources are introduced on a non-basal plane in the micropillars by nanoindentation prior to compression, yielding occurs at a significantly lower stress level of about 3 GPa and plastic deformation by slip proceeds on a pyramidal plane close to (-1-122). Furthermore, if regenerative dislocation sources for basal slip are present in the micropillar, the Laves phase can be continuously plastically deformed in a stable manner to at least 5% strain at a significantly lower stress of 800 MPa. We thus demonstrate the plastic deformation of this ternary Laves phase at the micron-scale at room temperature when sufficient dislocation sources are present.

Keywords

dislocationscompoundstress/strain relationship
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1516: Symposium JJ – Intermetallic-Based Alloys—Science, Technology and Applications , 2013 , pp. 269 - 274
Copyright
Copyright © Materials Research Society 2012 

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

Gomi, N., Morita, S., Matsuo, T., Takeyama, M., Report of JSPS 123rd Committee on Heat Resisting Materials and Alloys 42, 157 (2004).Google Scholar
Takeyama, M., Gomi, N., Morita, S., Matsuo, T., Mater. Res. Soc. Symp. Proc. 842, 461 (2005).Google Scholar
Ishikawa, S., Matsuo, T., Takeyama, M., Mater. Res. Soc. Symp. Proc. 980, 517 (2007).Google Scholar
Sugiura, T., Ishikawa, S., Mastuo, T., Takeyama, M., Mater. Sci. Forum 561-565, 435 (2007).CrossRefGoogle Scholar
Hasebe, Y., Hashimoto, K., Takeyama, M., J. Japan Inst. Metals, 75, 265(2011).CrossRefGoogle Scholar
Tarigan, I., Kurata, K., Takata, N., Matsuo, T., Takeyama, M., Mater. Res. Symp. Proc. 1295 317 (2011).CrossRefGoogle Scholar
Takata, N., Ishikawa, S., Matsuo, T., Takeyama, M., Mater. Res. Soc. Symp. Proc. 1128, 475 (2009).Google Scholar
Fischer-Cripps, A. C., “Contact Mechanics”, Nanoindentation, (Springer, 2010) pp. 1–20.Google Scholar
Bahr, D. F., Kramer, D. E., Gerberichk, W. W., Acta Mater. 49, 3605 (1998).CrossRefGoogle Scholar
Chisholm, M. F., Kumar, S. and Hazzledine, P., Science 307, 701 (2005).CrossRefGoogle Scholar
Hazzledine, P. M., Pirouz, P., Scripta Metall. Mater. 28 1277 (1993).10.1016/0956-716X(93)90468-8CrossRefGoogle Scholar
Friak, M., Ma, D., Neugebauer, J., Raabe, D., Max-Planck-Institut für Eisenforschung GmbH, Private Communications.Google Scholar
Greer, J. R., Nix, W. D., Phys. Rev. B 73, 245410 (2006).10.1103/PhysRevB.73.245410CrossRefGoogle Scholar