Abstract
We examined by atomic force microscope the slip traces produced on Ni3Al single crystals pre-deformed up to nearly 1% plastic strain at three temperatures in the anomaly domain: 293K, 500K and 720K. It is observed that, whatever the deformation temperature, the slip traces essentially belong to the primary octahedral slip system. The lengths of the slip lines become shorter and shorter with increasing temperature, while the number of dislocations that constitutes the lines is approximately constant. These results are interpreted in terms of a decreasing mean free path of the mobile dislocations when the temperature is raised. The implications of these results in the understanding of the flow stress anomaly are underscored.
Similar content being viewed by others
References
P. Veyssière and G. Saada, Dislocations in solids, ed. F.N.R. Nabarro and M.S. Duesbery (Amsterdam:Elsevier Science, 1996) p. 253.
E. M. Nadgorny and Y. L. Iunin, in: High Temperature Ordered Intermetallic Alloys VI 364, ed. J. A. Horton, I. Baker, S. Hanada, R. D. Noebe and D. S. Schwartz (Materials Research Society, Pittsburgh, 1995) p. 707.
C. B. Jiang, S. Patu, Q. Z. Lei and C. X. Shi, Philos. Mag. Letters, 78, 1 (1998).
S. Miura, S. Ochia, Y. Oya, Y. Mishima and T. Suzuki, in: High Temperature Ordered Intermetallic Alloys III 133, ed. C. T. Liu, A. I. Taub, N. S. Stoloff and C. C. Koch (Materials Research Society, 1989) p. 341.
P.H. Thornton, R.G. Davies and J.L. Johnston, Metall. Trans., 1, 207 (1970).
S.S. Ezz and P.B. Hirsch, Phil. Mag. A, 69, 105 (1994).
B. Matterstock, J.-L. Martin, J. Bonneville, T. Kruml. in: High Temperature Ordered Intermetallic Alloys VIII 552, ed. E. P. George, M. J. Mills and M. Yamaguchi (Materials Research Society, 1999) p. KK. 5.17.
P. Spätig, PhD Thesis, Ecole Polytechnique Fédérale de Lausanne, 1995.
J. Bonneville and J. L. Martin, in: Multiscale Phenomena in Plasticity Nato Science Series - Vol. 367 ed. J. Lepinoux, D. Mazière, V. Pontikis and G. Saada (Kluwer Academic Publishers, London, 2000) p. 57.
C. Coupeau, J. Bonneville, B. Matterstock, J. Grilhé and J.-L. Martin, Scripta Mat., 41, 945 (1999).
A.E. Staton-Bevan and R.D. Rawlings, Phys. Stat. Sol. A, 29, 613 (1975).
J. Bonneville, N. Baluc and J.-L. Martin, Proc. 6th Int. Symp. (JIMIS-6) on Intermetallic Compounds, ed. O. Izumi (The Japan Institut of Metals, 1991) p. 323.
N. Baluc, PhD Thesis, Ecole Polytechnique Fédérale de Lausanne, 1989.
C. Lall, S. Chin and D.P. Pope, Met. Trans. A, 10, 1323 (1979).
A. Couret, Y.Q. Sun and P.B. Hirsch, Phil. Mag. A; 67, 29 (1993).
G. Saada and P. Veyssière, Phil. Mag. A, a) 66, 1081 (1992); b) 70, 925 (1994).
D. Caillard and G. Molenat, Proc. 20th Risø Int. Symp. on Materials. Science: Deformation-Induced Microstructure: Analysis and Relation to Properties, ed. J. B. Bilde-Sørensen et al., Risø National. Laboratory. (Roskilde, Denmark 1999) p. 1.
C. Coupeau and J. Grilhé, J. of Mat. Sc. Eng. A, 271, 242 (1999).
B. Cheng, E. Carreno-Morelli, N. Baluc, J. Bonneville and R. Schaller, Phil. Mag. A, 79, 2227 (1999).
F. Louchet, Phil. Mag. A, 72, 905 (1995) au ]20a._F. Louchet, Phil. Mag. A, 77, 761 (1998).
C. Coupeau, J.C. Girard and J. Grilhé, J. of Vacuum Sci. Technology B, 16 (4), 1964 (1998).
C. Coupeau, F. Cleymand and J. Grilhé, Scripta Mat., 43, 187 (2000).
Acknowledgment
The authors wish to thank Prof. J.-L. Martin (Ecole Polytechnique Fédérale de Lausanne) and Prof. J. Grilhé (Université de Poitiers) for the numerous and highlighted discussions on the subject. We are also indebted to F. Préau for his help in the AFM observations and to G. Beney for preparing high quality specimen surfaces.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Coupeau, C., Kruml, T. & Bonneville, J. Slip trace characterisation of Ni3Al by atomic force microscopy.. MRS Online Proceedings Library 646, 300–305 (2000). https://doi.org/10.1557/PROC-646-N5.14.1
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-646-N5.14.1