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Title: Crystal plasticity modelling of cyclic deformation for a polycrystalline nickel based superalloy at high temperature
Authors: Lin, B.
Zhao, Liguo
Tong, Jie
Christ, H.-J.
Keywords: Crystal plasticity
Cyclic deformation
Finite element
Representative volume element
Heterogeneous deformation
Issue Date: 2010
Publisher: © Elsevier
Citation: LIN, B. ... et al., 2010. Crystal plasticity modelling of cyclic deformation for a polycrystalline nickel based superalloy at high temperature. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 527 (15), pp. 3581 - 3587.
Abstract: Cyclic deformation at elevated temperature has been modeled for a polycrystalline nickel-based superalloy using the crystal-plasticity constitutive formulations. Finite element analyses were carried out for a representative volume element (RVE), consisting of randomly oriented grains and subjected to periodic boundary constraints. Model parameters were determined by fitting the strain-controlled cyclic test data at 650 °C for three different loading rates. Simulated results are in good agreement with the experimental data for both stress–strain loops and cyclic hardening behavior. The model was utilized to predict the stress relaxation behavior during the hold periods at the maximum and minimum strain levels, and the prediction compares well with the experimental results. Localized stress and strain concentrations were observed due to the heterogeneous nature of grain microstructure and the mismatch of the mechanical properties of individual grains.
Description: This article was published in the journal, Materials Science and Engineering: A [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.msea.2010.02.045
Version: Accepted for publication
DOI: 10.1016/j.msea.2010.02.045
URI: https://dspace.lboro.ac.uk/2134/10991
Publisher Link: http://dx.doi.org/10.1016/j.msea.2010.02.045
ISSN: 0921-5093
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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