Effects of Rolling Strain Rates on Microstructure,Damping and Mechanical Properties of Mg-1%Al Alloy
Mg-1%Al alloy plates were rolled at different strain rates,and the effects of rolling strain rate on microstructure,mechanical properties and damping properties of Mg-1%Al alloy were investigated.As rolling strain rate increases,the average grain size and recrystallization volume fraction of Mg-1%Al alloy increase,while the tensile strength,yield strength and texture strength decrease.As the rolling strain rate increases,the elongation decreases after an initial increase,reaching the highest(25.33%)at a strain rate of 20 s-1,and the damping performance at room temperature is also improved.The damping value is 0.061 with the strain amplitude of 0.1%at a strain rate of 30 s-1,which is 1.5 times of that at a strain rate of 15 s-1.At a certain strain rate,the damping performance decreases as strain frequency increases.
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