Abstract
The deformation characteristics of icosahedral Al70Pd21.5Mn8.5 have been investigated by high temperature creep experiments, and the resultant microstructures have been examined by transmission electron microscopy (TEM). From 730 to 780 °C, microstructural analysis revealed that the deformation is controlled by dislocation glide, with an activation energy of 210 ± 30 kJ/mole and a stress exponent of 1.2 ± 0.2. From 780 to 810 °C, microstructures were characteristic of deformation controlled by dislocation glide and climb. The activation energy and stress exponent were determined to be 1700 ± 80 kJ/mole and 2.9 ± 0.3, respectively. Hardness measurements also reflected an increase in dislocation density, as the hardness of the deformed samples was approximately 10% higher than the as-cast sample.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
T. Shibuya, T. Hashimoto, and S. Takeuchi, Jpn. J. Appl. Phys. 29, L349 (1990).
S. S. Kang and J. M. Dubois, Philos. Mag. A 66, 151 (1992).
D. Bresson and D. Gratias, J. Non-Cryst. Solids 153–154, 468 (1993).
J. E. Shield, M. J. Kramer, and R. W. McCallum, J. Mater. Res. 8, 1199 (1993).
J. Devaud-Rzepski, M. Cornier-Quiquandon, and D. Gratias, Third International Meeting on Quasicrystals and Incommensurate Structures (World Scientific, Vista Hermosa, Mexico, 1989), p. 498.
M. Wollgarten, Z. Zhang, and K. Urban, Philos. Mag. A 64, 819 (1991).
M. Wollgarten, Z. Zhang, and K. Urban, Philos. Mag. Lett. 65, 1 (1992).
D. Levine, T. C. Lubensky, S. Ostlund, S. Ramaswamy, P. J. Steinhardt, and J. Toner, Phys. Rev. Lett. 54, 1520 (1985).
J. E. S. Socolar, T. C. Lubensky, and P. J. Steinhardt, Phys. Rev. B 34, 3345 (1986).
H-R. Trebin, R. Mikulla, and J. Roth, J. Non-Cryst. Solids 153–154, 272 (1993).
R. Wang, Y. F. Yan, and K. H. Kuo, J. Non-Cryst. Solids 153–154, 103 (1993).
J-P. Poirier, Creep of Crystals (Cambridge University Press, New York, 1985), p. 76.
M. G. Brown and P. J. Brown, Acta Crystallogr. 9, 911 (1956).
J. E. Shield, L. S. Chumbley, R. W. McCallum, and A. I. Goldman, Mater. Res. 8, 44 (1993).
S. Ebalard and F. Spaepen, J. Mater. Res. 4, 39 (1989).
J. E. Shield, M. J. Kramer, and R. W. McCallum, unpublished research.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Shield, J.E., Kramer, M.J. & McCallum, R.W. Plastic deformation in icosahedral Al–Pd–Mn alloys. Journal of Materials Research 9, 343–347 (1994). https://doi.org/10.1557/JMR.1994.0343
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1994.0343