

Preprint 84/2008
Lamination microstructure in shear deformed copper single crystals
Olga Dmitrieva, Patrick W. Dondl, Stefan Müller, and Dierk Raabe
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Submission date: 26. Nov. 2008
Pages: 23
published in: Acta materialia, 57 (2009) 12, p. 3439-3449
DOI number (of the published article): 10.1016/j.actamat.2009.03.035
Bibtex
MSC-Numbers: 74C15
PACS-Numbers: 62.20.fq, 61.72.Dd, 61.72.Bb
Keywords and phrases: Single Crystal Plasticity, Lamination Microstructure, Digital Image Correlation, Electron Back-Scatter Diffraction
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Abstract:
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.