Migration mechanism of <110> tilt boundaries in nickel

G.M. Poletaev ORCID logo , I.V. Zorya, R.Y. Rakitin show affiliations and emails
Received: 08 August 2020; Revised: 03 September 2020; Accepted: 13 September 2020
Citation: G.M. Poletaev, I.V. Zorya, R.Y. Rakitin. Migration mechanism of <110> tilt boundaries in nickel. Lett. Mater., 2020, 10(4s) 543-546
BibTex   https://doi.org/10.22226/2410-3535-2020-4-543-546

Abstract

The features and migration mechanism of tilt boundaries with the misorientation axis <110> in an fcc crystal using nickel as an example are studied by the method of molecular dynamicsThe features and migration mechanism of tilt boundaries with the misorientation axis <110> in an fcc crystal using nickel as an example were studied by the method of molecular dynamics. The dependences of the boundaries energy and the rate of their migration at a temperature of 1700 K on the misorientation angle are obtained. It is shown that the migration rate of <110> tilt boundaries under the same conditions is an order of magnitude lower than the migration rate of <111> and <100> boundaries, which is primarily due to the relatively low energy of <110> boundaries. In addition, the low-angle <110> tilt boundaries are unique compared to other tilt boundaries — grain boundary dislocations in them are ordinary perfect edge dislocations with straight cores that do not contain jogs periodically located on them, as in <111> and <100> boundaries. In <110> boundaries, as well as in <111> and <100> boundaries, there are two different sets of dislocations, but they are not always combined, as is often the case in <111> and <100> boundaries. Combined dislocations in <110> boundaries turned out to be less mobile during boundary migration than non-combined ones. An analogy of migration mechanisms of low-angle <110> boundaries with the previously considered <111> and <100> boundaries was noted. During migration, in the grain towards which the migration took place, regions of the same shape orderly rotated through the angle of misorientation were formed, the size of which depended on the distance between neighboring grain boundary dislocations.

References (20)

1. G. Gottstein, L. S. Shvindlerman. Grain Boundary Migration in Metals: Thermodynamics, Kinetics, Applications. 2nd ed. Boca Raton, CRC Press (2009) 711 p. Crossref
2. R. W. Balluffi, J. W. Cahn. Acta Metallurgica. 29, 493 (1981). Crossref
3. M. Winning, A. D. Rollett, G. Gottstein, et al. Philosophical Magazine. 90, 3107 (2010). Crossref
4. K. P. Zolnikov, D. S. Kryzhevich, A. V. Korchuganov. Letters on Materials. 9 (2), 197 (2019). Crossref
5. Y. Huang, F. J. Humphreys. Acta Materialia. 47, 2259 (1999). Crossref
6. Y. Huang, F. J. Humphreys. Materials Chemistry and Physics. 132, 166 (2012). Crossref
7. G. Poletaev, I. Zorya, R. Rakitin. Computational Materials Science. 148, 184 (2018). Crossref
8. G. M. Poletaev, I. V. Zorya, M. D. Starostenkov, et al. Journal of Experimental and Theoretical Physics. 128 (1), 88 (2019). Crossref
9. J. Li, S. J. Dillon, G. S. Rohrer. Acta Materialia. 57, 4304 (2009). Crossref
10. S. Ratanaphan, D. L. Olmsted, V. V. Bulatov, et al. Acta Materialia. 88, 346 (2015). Crossref
11. D. L. Olmsted, S. M. Foiles, E. A. Holm. Acta Materialia. 57, 3694 (2009). Crossref
12. V. V. Bulatov, B. W. Reed, M. Kumar. Acta Materialia. 65, 161 (2014). Crossref
13. M. A. Tschopp, Sh. P. Coleman, D. L. McDowell. Integrating Materials and Manufacturing Innovation. 4, 11 (2015). Crossref
14. N. V. Malyar, B. Grabowski, G. Dehm, et al. Acta Materialia. 161, 412 (2018). Crossref
15. Y. Liang, X. Yang, M. Gong, et al. Computational Materials Science. 161, 371 (2019). Crossref
16. S. G. Protasova, V. G. Sursaeva, L. S. Shvindlerman. Physics of the Solid State. 45, 1471 (2003). Crossref
17. F. Cleri, V. Rosato. Physical Review B. 48 (1), 22 (1993). Crossref
18. G. M. Poletaev, D. V. Novoselova, I. V. Zorya, et al. Physics of the Solid State. 60 (5), 847 (2018). Crossref
19. G. M. Poletaev, I. V. Zorya. Technical Physics Letters. 46 (6), 575 (2020). Crossref
20. I. V. Zorya, G. M. Poletaev, M. D. Starostenkov. Fundamentalnye problemy sovremennogo materialovedenia. 17 (1), 45 (2020) (in Russian) [И. В. Зоря, Г. М. Полетаев, М. Д. Старостенков. Фундаментальные проблемы современногоматериаловедения. 17(1), 45 (2020).].

Similar papers