期刊
ACTA MATERIALIA
卷 100, 期 -, 页码 53-63出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.08.012
关键词
Micropillar compression; Magnesium alloy; Precipitates; Twinning; Slip
资金
- Australian Research Council
- Deakin University
A Mg-5%Zn alloy has been aged to form c-axis rod precipitates which are known to increase strength. Micropillar compression tests were carried out in the precipitate-free and aged samples to investigate the effects of these precipitates on twinning and slip in magnesium alloys. Basal slip, pyramidal slip and {10 (1) over bar2} twinning were selectively activated by compressing micropillars in the [112 (3) over bar], [0001] and [11 (2) over bar0] orientations, respectively. It has been found that precipitation causes moderate hardening of the basal slip system, and also significantly increases the work hardening rate. The compression of [11 (2) over bar0] initiated twinning, but the present experiments were dominated by twin nucleation, rather than growth. It was found that the effect of precipitation on twin nucleation was negligible. Precipitation had little effect on specimens compressed in the c-axis. Crown Copyright (C) 2015 Published by Elsevier Ltd.
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