【摘 要】
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The hot deformation behavior of nickel base superalloy 617B has been studied using hot compression experiments.Specimens were deformed in the temperature ra
【机 构】
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State Key Laboratory of Advanced Stainless Steel,Taiyuan iron & Steel Co.,LTD Shanxi,Taiyuan 030003,
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The hot deformation behavior of nickel base superalloy 617B has been studied using hot compression experiments.Specimens were deformed in the temperature range of 1120-1210 °C with strain rates of 0.1 to 20 s-1 and total strain of above 0.85.True stress-true strain curves and deformation microstructures were studied.The results show that dynamic recrystallization is the mainly softening mechanism during the high temperature deformation of Inconel617B,and it can be effectively promoted by increasing deformation temperature.When deformation temperature is higher than 1180 °C,completely recrystallized microstructures can be obtained.Dependence of peak stress on the temperature and strain rate is modeled using the hyperbolic-sine Arrheniustype equation.The average activation energy is determined to be 549kJ/mol.
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