Journal
SCRIPTA MATERIALIA
Volume 107, Issue -, Pages 127-130Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.06.002
Keywords
Mg alloys; Annealing strengthening; GP zone; Dislocation pinning
Categories
Funding
- Monash Centre for Electron Microscopy
- Australian Research Council
- Baosteel Company
- Australia Postgraduate Award
- International Postgraduate Research Scholarship
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Magnesium sheet alloy of dilute composition, Mg-0.3Zn-0.1Ca (at.%), does not exhibit any hardening response during heating. However, an annealing treatment at 80-200 degrees C, after some plastic strain in tension, leads to a remarkable strengthening, rather than softening, effect. By using electron backscattered diffraction and scanning transmission electron microscopy, it is found that the strengthening effect is caused by the pinning of gliding basal dislocations by GP zones and possibly solute atoms segregated to the dislocations. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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