Journal
ACTA MATERIALIA
Volume 52, Issue 5, Pages 1133-1142Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2003.10.046
Keywords
neutron diffraction; elastoplastic self-consistent model; duplex steel
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A new method for determining the parameters characterising elastoplastic deformation of two-phase material is proposed. The method is based on the results of neutron diffraction and mechanical experiments, which are analysed using the self-consistent rate-independent model of elastoplastic deformation. The neutron diffraction method has been applied to determine the lattice strains and diffraction peak broadening in two-phase austeno-ferritic steel during uniaxial tensile test. The elastoplastic model was used to predict evolution of internal stresses and critical resolved shear stresses. Calculations based on this model were successfully compared with experimental results and the parameters characterising elastoplastic deformation were determined for both phases of duplex steel. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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