Abstract
The microstructure and low-temperature superplasticity of ZK60 magnesium alloy processed by equal-channel angular pressing (ECAP) were investigated. Homogeneous and refined microstructure was achieved after four passes of ECAP at 200 °C. After ECAP, the ZK60 alloy showed excellent superplastic elongation of 628% at 250 °C under strain rate of 1.67 × 10−3 s−1. Low-temperature superplasticity was obtained after four passes of ECAP at 200 °C. A theoretical foundation for severe plastic deformation of magnesium alloy at low temperature is developed in this work.
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