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在温度为 3 65～ 5 65℃和应变速率为 2 .0 8× 1 0 - 3～5 .2 1× 1 0 - 1 s- 1 的范围内 ,测试了 Si Cp/ AZ3 1镁基复合材料的超塑性。在温度为 5 2 5℃和应变速率大于 1 0 - 1 s- 1的条件下 ,得到延伸率 2 2 8%和应变速率敏感性指数 m>0 .3 ,温度提高到 5 40℃时在更高的应变速率 (5 .2 1× 1 0 - 1s- 1 )下得到延伸率 1 95 %。 Si Cp细化了复合材料基体组织 ,在超塑性试样断口上观察到了丝棒状物质。
In the temperature range of 3 65 ~ 655 ℃ and the strain rate of 2.08 × 10 ~ 3 ~ 5. 2 1 × 10 ~ 1 s-1, the Si Cp / AZ31 magnesium matrix composites Superplasticity At a temperature of 5 2 5 ℃ and a strain rate of more than 10 ~ 1 s-1, an elongation of 22.8% and a strain rate sensitivity index m> 0.3 were obtained. When the temperature was raised to 5 40 ℃, A high strain rate (5 .21 × 1 0 - 1s-1) gives an elongation of 95%. Si Cp refined the matrix structure of the composite and observed the rod-like substance on the fracture of the superplastic specimen.