Strain rate effect of high purity aluminum single crystals: Experiments and simulations

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In order to study the strain rate effect on single crystal of aluminum (99.999% purity), aluminum single crystals are fabricated and subjected to uniaxial compression loading at quasi-static and dynamic strain rates, i.e., from 10(-4)s(-1) to 1000s(-1). The orientation dependence is also investigated with single slip or multi slip. The stress-strain curves of pure Al single crystals along two orientations and at different strain rates are obtained after measuring initial orientation using the Laue Back-Reflection technique. Crystal Plasticity Finite Element Method (CPFEM) with three different single crystal plasticity constitutive models is used to simulate the deformations along two orientations under various strain-rates. The classical and two newly developed single crystal plasticity models are used in the investigation. The simulation results of these models are compared to experimental results in order to study their abilities to predict finite plastic deformation of single crystalline metal over a wide strain rate range. (C) 2014 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2015-04
Language
English
Article Type
Article
Keywords

POLYCRYSTAL PLASTICITY MODEL; HIGH-TEMPERATURE DEFORMATION; DISLOCATION DENSITY; MECHANICAL RESPONSE; CONSTITUTIVE MODEL; TENSILE DEFORMATION; TEXTURE EVOLUTION; LOCALIZED DEFORMATION; GRAIN-BOUNDARIES; HARDENING STAGES

Citation

INTERNATIONAL JOURNAL OF PLASTICITY, v.67, pp.39 - 52

ISSN
0749-6419
DOI
10.1016/j.ijplas.2014.10.002
URI
http://hdl.handle.net/10203/203710
Appears in Collection
ME-Journal Papers(저널논문)
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