Journal
ACTA MATERIALIA
Volume 92, Issue -, Pages 243-254Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.03.056
Keywords
Micromechanics; In situ; EBSD; GND density; Deformation mechanisms
Funding
- Austrian Research Promotion Agency (FFG) [831163]
- Carinthian Economic Promotion Fund (KWF) [KWF-1521\22741\34186]
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In this study, tension experiments on Cu micro-samples at temperatures between 143 and 873 K were performed in order to analyze the influence of grain size, temperature and strain rate on the mechanical properties and fracture mode. The activation energy and evolution of the dislocation density have been analyzed to identify the deformation mechanisms. A transition from bulk-like to stochastic, small-scale behavior has been found with increasing grain size. Furthermore, dependent on the grain size and temperature a change from dislocation based plasticity to diffusion controlled deformation was observed. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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