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FGH4096/GH4133B双合金在变形温度1020~1140℃、应变速率0.001~1.0s-1条件下进行50%变形量的热模拟压缩试验。根据应力-应变曲线,基于传统Arrhenius型方程建立双合金高温变形过程中的本构关系。结合应力-应变曲线与Poliak-Jonas准则分析不同变形参数对双合金组织软化机制的影响。结果表明:FGH4096/GH4133B双合金变形时,升高温度和降低应变速率可有效诱导该双合金的软化机制由动态回复转变为动态再结晶。
FGH4096 / GH4133B double alloy was subjected to thermal simulation compression test with 50% deformation at deformation temperature of 1020 ~ 1140 ℃ and strain rate of 0.001 ~ 1.0s-1. According to the stress-strain curve, the constitutive relation in the high-temperature deformation of dual alloys was established based on the traditional Arrhenius equation. The effect of different deformation parameters on the softening mechanism of bimetallic structure was analyzed by stress-strain curve and Poliak-Jonas criterion. The results show that when FGH4096 / GH4133B alloy is deformed, increasing the temperature and decreasing the strain rate can effectively induce the softening mechanism of the double alloy from dynamic recovery to dynamic recrystallization.