Direct measurement of vacancy relaxation by dilatometry
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Authors
External Organisational units
- Technische Universität Graz
- Erich Schmid Institute of Materials Science
Abstract
A model is proposed for directly determining the volume of lattice vacancies by means of dilatometric measurements of the anisotropic irreversible length change which occurs during annealing of lattice vacancies at grain boundaries of shape-anisotropic crystallites. The model is tested using nanocrystalline Ni after the high-pressure torsion deformation which exhibits excess concentration of lattice vacancies and elongated crystallite shape. Different length changes upon annealing parallel and perpendicular to the elongation axis occur from which a vacancy volume can be derived.
Details
Original language | English |
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Article number | 021906 |
Number of pages | 5 |
Journal | Applied physics letters |
Volume | 109.2016 |
Issue number | 2 |
DOIs | |
Publication status | Published - 14 Jul 2016 |