Abstract
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 °C was 2040% and 1400% for the strain rates of 3 × 10−4 s−1 and 3 × 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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Lapovok, R., Cottam, R., Thomson, P.F. et al. Extraordinary superplastic ductility of magnesium alloy ZK60. Journal of Materials Research 20, 1375–1378 (2005). https://doi.org/10.1557/JMR.2005.0180
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DOI: https://doi.org/10.1557/JMR.2005.0180