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ID: 123704.0, MPI für Eisenforschung GmbH / Microstructure Physics and Metal Forming
Orientation dependence of nanoindentation pile-up patterns and of nanoindentation microtextures in copper single crystals
Authors:Wang, Y.; Raabe, D.; Klüber, C.; Roters, F.
Date of Publication (YYYY-MM-DD):2004-05-03
Title of Journal:Acta Materialia
Journal Abbrev.:Acta Mater.
Issue / Number:8
Start Page:2229
End Page:2238
Review Status:not specified
Audience:Not Specified
Abstract / Description:We present a study about the dependence of nanoindentation pile-up patterns and of microtextures on the rystallographic orientation using high purity copper single crystals. Experiments were conducted on a Hysitron nanoindentation setup using a conical indenter in order to avoid symmetries others than those of the crystal structure. Orientation measurements were conducted using a high resolution electron back-scatter diffraction technique for the automated acquisition of texture mappings around the indents. Simulations were carried out by means of a 3D elastic–viscoplastic crystal plasticity finite element method which takes full account of crystallographic slip and orientation changes during indentation. The experiments as well as the simulations show that the pile-up patterns on the surfaces of (0 0 1)-, (0 1 1)- and (1 1 1)-oriented single crystals have four-, two-, and sixfold symmetry, respectively. The different pile-up patterns can be explained in terms of the strong crystallographic anisotropy of the out-of-plane displacements around the indents. Pronounced accumulation of material entailing characteristic pile-up patterns occurs along the intersection vectors between the primary crystallographic slip planes and the indented surface planes.
Free Keywords:Texture; Nanoindentation; Plastic deformation; Copper; Single crystal; Pile-up
External Publication Status:published
Document Type:Article
Affiliations:MPI für Eisenforschung GmbH
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