Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-12-01T17:11:22.426Z Has data issue: false hasContentIssue false
  • English
  • Français

Slip Transition and Dislocation Structures in Off-Stoichiometric NiAl Single Crystals

Published online by Cambridge University Press:  15 February 2011

R. Srinivasan ,
M. F. Savage ,
M. S. Daw ,
R. D. Noebe  and
M. J. Mills
R. Srinivasan
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
M. F. Savage
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
M. S. Daw
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634–1911
R. D. Noebe
Affiliation:
NASA Lewis Research Center, Cleveland, OH 44135
M. J. Mills
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
Get access

Abstract

Compression tests have been performed on hard-oriented Ni-44A1 single crystals for several temperatures and strain levels. There is a slip transition from a<111> type slip to non-a<111> type slip which corresponds with the observation of yield points. Transmission electron microscopy studies provide evidence for decomposition of a<111> dislocations into a<101> and a<010> dislocations near the “knee” of the yield strength curve. The mechanism of this slip transition and the nature of the dislocation processes both below and above the “knee” are described.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 460: Symposium Z – High-Temperature Ordered Intermetallic Alloys VII , 1996 , 505
Copyright
Copyright © Materials Research Society 1997

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. Field, R. D., Lahrman, D. F., and Darolia, R., Acta Metall. Mater. 39, 2951 (1991).Google Scholar
2. Pascoe, R. T. and Newey, C. W. A., Phys. Stat. Sol. 29, 357 (1968).Google Scholar
3. Loretto, M. H. and Wasilewski, R. J., Phil. Mag. 23, 1311 (1971).Google Scholar
4. Miracle, D. B., Acta Metall. Mater. 39, 1457 (1991).Google Scholar
5. Fraser, H. L., Smallman, R. E., and Loretto, M. H., Phil. Mag. 28, 651 (1973).Google Scholar
6. Fraser, H. L., Loretto, M. H., and Smallman, R. E., Phil. Mag. 28, 667 (1973).Google Scholar
7. Ball, A. and Smallman, R. E., Acta Metall. J4, 1517 (1966).Google Scholar
8. Kim, J. T. and Gibala, R., Mat. Res. Soc. Symp. Proc. 213. 261(1991).Google Scholar
9. Kim, J. T., Ph.D. Thesis, University of Michigan (1990).Google Scholar
10. Pascoe, R. T. and Newey, C. W. A., Metal. Sci. J. 2, 138 (1968).Google Scholar
11. Pascoe, R. T. and Newey, C. W. A., Metal Sci. J. 5, 50 (1971).Google Scholar
12. Rusovic, N. and Warlimont, H., Phys. Stat. Sol. 44, 609 (1977).Google Scholar
13. Fu, C. L. and Yoo, M. H., Acta Metall. Mater. 40, 703 (1992).Google Scholar
14. Srinivasan, R., Savage, M. F., Mills, M. J., Daw, M. S., and Noebe, R. D., Deformation, Fracture and Fatigue of Ordered Intermetallic materials, TMS Publications (1996), in press.Google Scholar
15. Mukerjee, D., Ph.D. Thesis, University of Birmingham (1978).Google Scholar