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对体育器材用Ti60合金铸件进行等温压缩试验,研究了该合金在960~1110℃和应变率0.001~10.0 s~(-1)下的材料特性。以双曲正弦模型为基础构建了合金的热变形本构方程,分析了该合金在高温下的塑性。对比观察实验前后合金的微观组织。结果表明,α+β相区和β相区的表观活化能分别为648、179 k J/mol,原因是α+β相区片状α组织的动态球化作用更剧烈;流动应力与变形温度和应变率有关;应变为0.6时,流动应力随应变率的增大而增大;在应变率一定时,变形温度越高,流动应力越小。
The isothermal compression tests of Ti60 alloy castings for sports equipment were carried out to study the material properties of the alloy at 960 ~ 1110 ℃ and strain rate of 0.001 ~ 10.0 s ~ (-1). Based on the hyperbolic sine model, the thermal deformation constitutive equation of the alloy was established, and the plasticity of the alloy under high temperature was analyzed. Compare the microstructure of the alloy before and after the experiment. The results show that the apparent activation energies of α + β phase and β phase are 648 and 179 kJ / mol, respectively. The reason is that the dynamic spheroidization of α-β phase region is more severe. The flow stress and deformation The temperature is related to the strain rate. When the strain is 0.6, the flow stress increases with the strain rate. When the strain rate is constant, the higher the deformation temperature is, the smaller the flow stress is.