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对Inconel625合金在1000-1200℃,应变速率为10-80 s~(-1)条件下的热模拟压缩实验结果进行分析,修正了实验中由于高速变形产生的热效应引起的真应力-真应变曲线上流动应力的误差,通过回归分析建立了Inconel625合金高温高速下的本构模型.变形后的微观组织分析结果表明,提高变形速率是细化最终晶粒尺寸的重要途径,但过高的变形速率容易产生残余孪晶。在适当的温度(1050℃)与应变速率(50 s~(-1))下,合金具有均匀而细小的理想组织。
The simulation results of thermal simulation of Inconel625 alloy at 1000-1200 ℃ and strain rate of 10-80 s ~ (-1) were analyzed, and the true stress-true strain curve caused by the thermal effect of high-speed deformation was corrected The constitutive model of Inconel625 alloy under high temperature and high velocity was established by regression analysis.The results of microstructure analysis after deformation show that increasing the deformation rate is an important way to refine the final grain size.But the excessive deformation rate Easy to produce residual twins. At proper temperature (1050 ℃) and strain rate (50 s ~ (-1)), the alloy has a uniform and small ideal structure.