Abstract
The compressive properties of Mg-3Al-2Zn-2Y alloy at room temperature at strain rates in range of 0.001s-1~4800s-1were investigated. To the alloy compressed at 1300s-1, its basal and non-basal slip produce the mixed dislocation configuration including parallel, bended and tangled dislocation. There is significant twinning in the alloys compressed at 1800s-1and 4800s-1. The flow stress and ultimate trength show the strain rate hardening behavior at the range of 0.001s-1~1800s-1. There appears localized deformation zones formed with recrystal grains and twin crystals in the alloy compressed at 4800s-1, whose mechanical properties are lower than those of alloy compressed at 1800s-1.
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