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We have decided to discontinue the publication of preprints on our preprint server end of 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.
Lamination microstructure in shear deformed copper single crystals
Olga Dmitrieva, Patrick W. Dondl, Stefan Müller and Dierk RaabeAbstract
We investigate the formation of microscopic patterns in a copper single crystal deformed in a shear experiment. Using high-resolution electron backscatter diffraction (EBSD) imaging, we find a band-like microstructure consisting of confined areas in the sample with rotated lattice. Digital image correlation (DIC) allows us to exactly determine the macroscopic state of deformation of the sample. This data can be used as a side condition to calculate the lamination parameters from the theory of kinematically compatible lamination of separate material regions, each deforming in single slip. The parameters given by the theory agree with the measured properties, i.e., a lattice rotation of 3 degrees and a lamination normal rotated 7 degrees counterclockwise from a 111> direction.
- Received:
- 26.11.08
- Published:
- 05.12.08
- MSC Codes:
- 74C15
- PACS:
- 62.20.fq, 61.72.Dd, 61.72.Bb
- Keywords:
- Single Crystal Plasticity, Lamination Microstructure, Digital Image Correlation, Electron Back-Scatter Diffraction