Skip to main content Accessibility help
×
Home

Plastic deformation in icosahedral Al–Pd–Mn alloys

  • J.E. Shield (a1), M.J. Kramer (a1) and R.W. McCallum (a1)

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.

Copyright

References

Hide All
1Shibuya, T., Hashimoto, T., and Takeuchi, S., Jpn. J. Appl. Phys. 29, L349 (1990).
2Kang, S. S. and Dubois, J. M., Philos. Mag. A 66, 151 (1992).
3Bresson, D. and Gratias, D., J. Non-Cryst. Solids 153–154, 468 (1993).
4Shield, J. E., Kramer, M. J., and McCallum, R. W., J. Mater. Res. 8, 1199 (1993).
5Devaud-Rzepski, J., Cornier-Quiquandon, M., and Gratias, D., Third International Meeting on Quasicrystals and Incommensurate Structures (World Scientific, Vista Hermosa, Mexico, 1989), p. 498.
6Wollgarten, M., Zhang, Z., and Urban, K., Philos. Mag. A 64, 819 (1991).
7Wollgarten, M., Zhang, Z., and Urban, K., Philos. Mag. Lett. 65, 1 (1992).
8Levine, D., Lubensky, T. C., Ostlund, S., Ramaswamy, S., Steinhardt, P. J., and Toner, J., Phys. Rev. Lett. 54, 1520 (1985).
9Socolar, J. E. S., Lubensky, T. C., and Steinhardt, P. J., Phys. Rev. B 34, 3345 (1986).
10Trebin, H-R., Mikulla, R., and Roth, J., J. Non-Cryst. Solids 153–154, 272 (1993).
11Wang, R., Yan, Y. F., and Kuo, K. H., J. Non-Cryst. Solids 153–154, 103 (1993).
12Poirier, J-P., Creep of Crystals (Cambridge University Press, New York, 1985), p. 76.
13Brown, M. G. and Brown, P. J., Acta Crystallogr. 9, 911 (1956).
14Shield, J. E., Chumbley, L. S., McCallum, R. W., and Goldman, A. I., Mater. Res. 8, 44 (1993).
15Ebalard, S. and Spaepen, F., J. Mater. Res. 4, 39 (1989).
16Shield, J. E., Kramer, M. J., and McCallum, R. W., unpublished research.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed