Skip to main content

Structure of Dislocations and Mechanical Properties of B2 Alloys

  • V. Paidar (a1) and V. Vitek (a2)

Adequate mechanical properties are important for both structural and functional applications of materials. There are significant differences in mechanical behaviour of different B2 ordered alloys and these are related to the properties of superlattice dislocations. Several types of dislocations can be activated, in particular <111> and <001> dislocations gliding on {110} planes. Their mobility can vary markedly from material to material and this has a strong impact on the mechanical properties. With the aim to elucidate qualitatively the differences between different alloys crystallising in the same B2 structure we analyse possible dislocation dissociations. The model employed is based on the isotropic elasticity but includes an important characteristic of stacking-fault-like defects involved in the splittings, the deviation of their displacements away from the usually assumed ½<111> APB.

Hide All
1. Takasugi, T., Tsurisaki, K., Izumi, O. and Ono, S., Phil. Mag. A 61 (1990) 785.
2. Shindo, D., Yoshida, M., Lee, B. T., Takasugi, T. and Hiraga, K., Intermetallics 3 (1995) 167.
3. Wollmershauser, J. A., Neil, C. J. and Agnew, S. R., Met. Mater. Trans. A 41 (2010) 1217.
4. Umakoshi, Y., Yamaguchi, M., Namba, Y. and Murakami, M., Acta Metall. 24 (1976) 89.
5. Yamagata, T. and Yoshida, H., Mater. Sci. Eng. 12 (1973) 95.
6. Wu, D., Baker, I., Munroe, P. R. and George, E. P., Intermetallics 15 (2007) 103.
7. Vitek, V. and Paidar, V., in “Dislocations in Solids”, edited by Hirth, J. P. (North-Holland, Amsterdam, 2008) p. 439.
8. Rachinger, W. A. and Cottrell, A. H., Acta Metall. 4 (1956) 109.
9. Yoo, M. H., Takasugi, T., Hanada, S. and Izumi, O., Mater. Trans. JIM 31 (1990) 435.
10. Takasugi, T., Hanada, S., Yoshida, M. and Shindo, D., Phil. Mag. A 71 (1995) 347.
11. Parthasarathy, T. A., Rao, S. I. and Dimiduk, D. M., Phil. Mag. A 67 (1993) 643.
12. Farkas, D., Zhou, S. J., Vaihle, C., Mautasa, B. and Panova, J., J. Mater. Res. 12 (1997) 93.
13. Vailhe, C. and Farkas, D., Acta Mater. 45 (1997) 4463.
14. Schroll, R., Vitek, V. and Gumbsch, P., Acta Mater. 46 (1998) 903.
15. Vailhe, C. and Farkas, D., Phil. Mag. A 79 (1999) 921.
16. Paidar, V., Lin, Y.-S., Cak, M. and Vitek, V., Intermetallics 18 (2010) 1285.
17. Yamaguchi, M., Pope, D. P., Vitek, V. and Umakoshi, Y., Phil. Mag. A 43 (1981) 1265.
18. Hirth, J. P. and Lothe, J., Theory of Dislocations (Pergamon, Oxford, 1982).
19. Paidar, V. and Vitek, V., in “Intermetalic Compounds, Progress”, edited by Westbrook, J. H. and Fleischer, R. L. (John Wiley, Chichester, 2002) p. 437.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


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