Journal
ACTA MATERIALIA
Volume 59, Issue 14, Pages 5674-5680Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2011.05.042
Keywords
Grain boundary migration; Grain rotation; Bicrystal; Stress; Shear deformation
Funding
- Deutsche Forschungsgemeinschaft [MO 848/10-2]
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Simultaneous shear coupling and grain rotation were observed experimentally during grain boundary migration in high-purity Al bicrystals subjected to an external mechanical stress at elevated temperatures. This behavior is interpreted in terms of the structure of the investigated planar 18.2 degrees < 1 0 0 > non-tilt grain boundary with a 20 degrees twist component. For characterization of the grain rotation after annealing under stress the bicrystal surface topography across the boundary was measured by atomic force microscopy. The temperature dependence of the boundary migration rate was measured and the migration activation energy determined. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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