【摘要】 开展了多阶段变形的方法对AZ3 1镁合金超塑性性能提升的研究。结果表明 :第一阶段动态再结晶的最佳条件是温度 3 0 0℃、应变速率 1× 10 - 3s- 1 、此条件下变形量为 5 0 %的时候 ,晶粒尺寸约为 10 μm ;在第二阶段 ,实验温度为40 0℃以及应变速率为 10 - 3s- 1 的变形条件下 ,获得最大延伸率 2 82 .1%。更多还原

【Abstract】 The improvement of superplasticity in a rolled AZ31 magnesium alloy by multi-stage deformation was investigated. The results show the optimum DRX condition was identified as 300℃ at a constant strain rate of 1×10^-3s^-1at the first stage. When the elongation is 50% at this condition, the grain size is about 10μm; At the second stage, the maximum elongation attainable at 400℃ and 1×10^-3s^-1is 282.1%.更多还原