论文部分内容阅读
研究了温度和应变速率对常规铸造和部分凝固铸造Zn-20％Al合金的半固态压缩形变的影响规律。试验温度和应变速率范围分别为380～430℃和2.1×10~(-1)～8.1×10~(-4)s~(-1)。试验结果表明,金属在半固态时的形变抗力比固态时大幅度降低;部分凝固铸造合金的形变能力优于常规铸造合金;在高温(430℃)、低应变速率(8.1×10~(-4)s~(-1))条件下,常规铸造合金也能获得较好的极限塑性和低的变形抗力。上述结果为研究金属半固态形变提供了依据。
The effect of temperature and strain rate on the semi-solid compression deformation of conventional cast and partially solidified cast Zn-20% Al alloys was investigated. The experimental temperature and strain rate ranges from 380 to 430 ℃ and from 2.1 × 10 -1 to 8.1 × 10 -4 s -1, respectively. The experimental results show that the deformation resistance of metal in the semi-solid state is significantly lower than that in the solid state. The deformation ability of the partially solidified alloy is better than that of the conventional cast alloy. Under high temperature (430 ℃) and low strain rate (8.1 × 10 -4 ) s ~ (-1)), conventional cast alloys can also achieve better ultimate ductility and lower deformation resistance. The above results provide the basis for the study of metal semi-solid deformation.