Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1445402 | Acta Materialia | 2015 | 12 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Wimmer, W. Heinz, A. Leitner, T. Detzel, W. Robl, C. Kirchlechner, G. Dehm,