Journal article
Coupled grain boundary motion in a nanocrystalline grain boundary network
M Velasco, H Van Swygenhoven, C Brandl
Scripta Materialia | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2011
Abstract
Coupled grain boundary motion was simulated in a three-dimensional nanocrystalline Al grain boundary network using molecular dynamics. It is shown that, in spite of the triple junction constraints, a symmetrical Σ75 tilt boundary can migrate during the microplastic regime with the same coupling factor as when simulated in a bicrystal configuration. After reaching the full plastic regime, dislocations start coming into play, changing the grain boundary structure and hindering further coupled motion. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Grants
Awarded by Office of Science
Funding Acknowledgements
C.B. was partially supported by the Center for Materials at Irradiation and Mechanical Extremes, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. 2008LANL1026.