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Title: Temperature-dependent crystal-plasticity model for magnesium: a bottom-up approach
Authors: Liu, Qiang
Roy, Anish
Silberschmidt, Vadim V.
Keywords: Crystal-plasticity model
Texture evolution
Deformation mechanism
Issue Date: 2017
Publisher: © The Authors. Published by Elsevier Ltd.
Citation: LIU, Q., ROY, A. and SILBERSCHMIDT, V.V., 2017. Temperature-dependent crystal-plasticity model for magnesium: a bottom-up approach. Mechanics of Materials, 113, pp. 44-56.
Abstract: A crystal-plasticity model is developed to account for temperature-dependent mechanical behaviour of magnesium in this paper. The constitutive description of plastic deformation accounts for crystalline slip and twining as well as their interactions. The temperature dependence is incorporated into the constitutive equations for both slip and twin modes based on experimental observations. A bottom-up computational modelling framework is proposed to validate the developed constitutive model. First, the crystal-plasticity model is calibrated with experimental results for plane compression at micro-scale. At meso-scale, a three-dimensional representative element volume was adopted to represent the microstructure of polycrystalline magnesium. In the combination with the proposed constitutive theory, the effects of temperature on mechanical response and evolution of twins and texture in polycrystalline magnesium were predicted. Comprehensive experimental validations at meso-scale were performed to consolidate further the developed crystal-plasticity model incorporating temperature dependence in terms of stress-strain curves, the Hall-Petch relationship and texture evolution. This work provides a useful modelling tool for understanding temperature-dependent behaviour of magnesium, which could be used to improve the formability of this family of materials.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: Funding from the Engineering and Physical Sciences Research Council (UK) through grant EP/K028316/1 and Department of Science and Technology (India), project MAST, is gratefully acknowledged.
Version: Published
DOI: 10.1016/j.mechmat.2017.07.008
URI: https://dspace.lboro.ac.uk/2134/26089
Publisher Link: http://dx.doi.org/10.1016/j.mechmat.2017.07.008
ISSN: 0167-6636
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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