Journal
INTERNATIONAL JOURNAL OF PLASTICITY
Volume 72, Issue -, Pages 127-150Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijplas.2015.05.009
Keywords
Twinning; Polycrystalline material; Crystal plasticity; Nondestructive evaluation
Funding
- Czech Science Foundation [14-36566G]
- Grant Agency of Charles University
- Hungarian Scientific Research Fund, OTKA [K-109021]
- Russian Ministry of Education and Science [11.G34.31.0031, 14.583.21.0006]
- US Department of Energy's Office of Basic Energy Sciences
- US DOE [DE-AC52-06NA25396]
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A detailed analysis of the loading mode dependence of the deformation mechanisms in randomly textured cast magnesium is presented. An elasto-plastic self-consistent model (EPSC) is used to model the dislocation slip and twinning activity, respectively. The results are quantitatively compared with experimental data obtained by in-situ neutron diffraction (ND) and acoustic emission (AE). Both EPSC calculations and ND line profile analysis show an increased activity of prismatic slip with increasing strain and a loading mode dependence of the activation of the second-order pyramidal slip. The AE measurements and the modeling indicate a difference in the number of nucleated twin variants and the twinned volume in tension and compression. (C) 2015 Elsevier Ltd. All rights reserved.
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