Effects of a disconnection dipole on the shear-coupled grain boundary migration

Yaolin Guo; Jincheng Wang; Zhijun Wang; Junjie Li; Yujuan Yang; Yaohe Zhou

doi:10.1016/j.commatsci.2015.07.037

Author(s)

Yaolin Guo
Jincheng Wang
Junjie Li
Yujuan Yang
Yaohe Zhou

Detail(s)

Original language	English
Pages (from-to)	253-257
Journal / Publication	Computational Materials Science
Volume	109
Online published	30 Jul 2015
Publication status	Published - Nov 2015
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.commatsci.2015.07.037 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84938581226&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(41c73cbb-ffa6-4b4e-b482-956208c907cf).html

Abstract

Effects of a preexisting disconnection dipole on the migration of a Σ5(3¯10)/[001] grain boundary (GB) at low shear rates have been investigated by using the minimized bulk dissipation phase field crystal model. Simulation results show that the two disconnections play different roles during the process of shear-coupled GB migration via different behaviors regarding heterogeneous nucleation and propagation of disconnections. Specifically, the different roles can be attributed to their structural deviation from the equilibrated crystallographic structure caused by shear loading: one disconnection contributes to the onset of GB migration by heterogeneous nucleation of disconnections, while the other one slows down the corresponding GB migration dynamics through the impediment of homogeneous nucleation in the flat GB plane.

Research Area(s)

Disconnection dipole, Grain boundary migration, Phase field crystal, Shear-coupled motion

Citation Format(s)

[ RIS ] [ BibTeX ]

Effects of a disconnection dipole on the shear-coupled grain boundary migration. / Guo, Yaolin; Wang, Jincheng; Wang, Zhijun et al.
In: Computational Materials Science, Vol. 109, 11.2015, p. 253-257.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Guo, Y, Wang, J, Wang, Z, Li, J, Yang, Y & Zhou, Y 2015, 'Effects of a disconnection dipole on the shear-coupled grain boundary migration', Computational Materials Science, vol. 109, pp. 253-257. https://doi.org/10.1016/j.commatsci.2015.07.037

Guo, Y., Wang, J., Wang, Z., Li, J., Yang, Y., & Zhou, Y. (2015). Effects of a disconnection dipole on the shear-coupled grain boundary migration. Computational Materials Science, 109, 253-257. https://doi.org/10.1016/j.commatsci.2015.07.037

Guo Y, Wang J, Wang Z, Li J, Yang Y, Zhou Y. Effects of a disconnection dipole on the shear-coupled grain boundary migration. Computational Materials Science. 2015 Nov;109:253-257. Epub 2015 Jul 30. doi: 10.1016/j.commatsci.2015.07.037

Guo, Yaolin ; Wang, Jincheng ; Wang, Zhijun et al. / Effects of a disconnection dipole on the shear-coupled grain boundary migration. In: Computational Materials Science. 2015 ; Vol. 109. pp. 253-257.