Abstract

The electroplastic deformation behavior of AZ31B magnesium alloy sheet was investigated by isothermal uni-axial tensile tests at different temperatures with or without electric pulse passing through the testing samples. The electroplastic effect on flow stress was confirmed. A flow stress model of AZ31B sheet taking into account the influence of electroplastic effect was proposed, and was verified by comparison with the testing results. The mechanism of flow stress decrease with elevated temperature and electric pulse was analyzed by comparing the sample’s microstructure, it was concluded that electric pulse induced dynamic recrystallization plays an important role in flow stress decrease and formability improvement.

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