期刊
ACTA MATERIALIA
卷 78, 期 -, 页码 1-13出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2014.06.023
关键词
Magnesium; Deformation; Twinning; Solute strengthening
资金
- EPSRC [EP/0002210/1]
- Engineering and Physical Sciences Research Council [EP/H020047/1] Funding Source: researchfish
- EPSRC [EP/H020047/1] Funding Source: UKRI
In situ neutron diffraction of two binary Mg alloys, Mg-0.5 wt.% Y and Mg-2.2 wt.% Y have been carried out in compression. The experimental data has been modelled using the elastoplastic self-consistent methodology in order to determine the critical resolved shear stress for basal slip, second-order < c + a > pyramidal slip and {1 0 (1) over bar 2} twinning. It was found that the addition of Y strengthens all three of the deformation modes examined. However, increasing the Y concentration from 0.5% to 2.2% showed no additional hardening in the basal slip and {1 0 (1) over bar 2} twinning modes, indicating that solute strengthening of these deformation modes is already exhausted by a concentration of 0.5% Y. Second-order pyramidal slip showed additional solute hardening at the higher concentration. Crown Copyright (C) 2014 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.
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