Low-temperature superplasticity and internal friction in microcrystalline Mg alloys processed by ECAP

Excellent low-temperature superplasticity (<300 °C) was observed in the ECAP-processed materials: elongations to failure are 810% and 570% at a strain rate of 3 × 10−3 s−1 for ZK60 and AZ91 alloys, respectively. Internal friction can be practically used to determine the optimum temperature for superplasticity. [Copyright &y& Elsevier]