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
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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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.

23.06.2018, 02:12