Journal
JOURNAL OF MATERIALS RESEARCH
Volume 20, Issue 6, Pages 1375-1378Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2005.0180
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Exceptionally high tensile ductility of commercial Mg alloy ZK60 is reported. It was achieved by equal channel angular pressing without any extra processing steps. The tensile ductility at 220 degrees C was 2040% and 1400% for the strain rates of 3 x 10(-4) s(-1) and 3 x 10(-3) s(-1), respectively. The strain rate sensitivity of the flow stress exhibited a value slightly above 0.5, which is characteristic of superplastic deformation. The grain structure associated with this behavior was shown to be bi-modal with further separation in two fractions with different grain sizes within the small grain size population.
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