期刊
ACTA MATERIALIA
卷 170, 期 -, 页码 155-165出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2019.03.027
关键词
Mg alloys; Solution hardening; Basal slip; Micropillar compression; Diffusion couples
资金
- European Research Council under the European Union's Horizon 2020 research and innovation programme (Advanced Grant VIRMETAL) [669141]
- China Scholarship Council [201506890002, 201506020081]
- Spanish Ministry of Science through the Juan de la Cierva program [FJCI-2016-29660]
- Regional Government of Madrid under program MAT4.0-CM
- Natural Science Funds of China [51571113]
The influence of solute atoms (Al and Zn) on the deformation mechanisms and the critical resolved shear stress for basal slip in Mg alloys at 298 K and 373 K was ascertained by micropillar compression tests in combination with high-throughput processing techniques based on the diffusion couples. It was found that the presence of solute atoms enhances the size effect at 298 K as well as the localization of deformation in slip bands, which is associated with large strain bursts in the resolved shear stress (tau(RSS))-strain (epsilon) curves. Deformation in pure Mg and Mg alloys was more homogeneous at 373 K and the influence of the micropillar size on the critical resolved shear stress was much smaller. In this latter case, it was possible to determine the effect of solute content on the critical resolved shear stress for basal slip in Mg Al and Mg-Zn alloys. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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