Article ID Journal Published Year Pages File Type
7913306 Scripta Materialia 2015 4 Pages PDF
Abstract
We report a grain boundary formation mechanism in face-centred cubic metals with low stacking fault energies. Severe plastic deformation produces primary nano-twins with a twin boundary spacing of several nanometres, followed by secondary twinning through the activation of Shockley partial dislocations. The partial dislocations interact with primary twin boundaries, resulting in de-twinning of the primary twins and producing very high densities of sessile dislocations. The accumulation of these dislocations produces new grain boundaries with neighbouring grains having similar orientations.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
Authors
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