Journal
SCRIPTA MATERIALIA
Volume 65, Issue 10, Pages 911-914Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.08.009
Keywords
Welding; Magnesium; Dynamic recrystallization; Strain rate; Hall-Petch effect
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Premier's Research Excellence Award (PREA)
- NSERC
- AUTO21 Network of Centers of Excellence
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Ultrasonic spot welding was carried out on 2-mm-thick sheets of magnesium alloy. A relationship between the dynamic recrystallized grain size and the Zener-Hollomon parameter was established. The energy level, strain rate and peak temperature played key roles in controlling the grain size of the ultrasonic spot-welded samples. A Hall-Petch-type relationship was established, and microhardness tests showed that the hardness decreased with increasing energy input, owing to increasing grain sizes. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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