Abstract The dynamic recrystallization (DRX) behavior of Ni-Fe-Cr based alloy was studied in temperature range of 980–1130 °C and strain rate range of 0.01–10s−1. By systematically analyzing the stress-strain data and microstructure evolution of Ni Fe Cr based alloy, the influences of strain rate, temperature and strain on the critical conditions for DRX behavior were investigated. Meanwhile, the constitutive equation of the correlation between peak stress and Z parameters was established by using hyperbolic sine constitutive equation. The DRX critical strain model, kinetics model and grain size model of the studied alloy were also established. The deformation activation energy is 496.92 kJ/mol. The DRX behavior of the studied alloy is sensitive to deformation temperature and strain rate. With the decrease of strain rates or the increase of deformation temperatures, the critical strain of DRX softening decreases, and the volume fraction of DRX increases. In addition, the three models can accurately predict and characterize DRX behavior of the studied alloy.

中文翻译：

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镍铁铬基合金动态再结晶行为研究

摘要 研究了 Ni-Fe-Cr 基合金在 980-1130 °C 温度范围和 0.01-10s-1 应变速率范围内的动态再结晶 (DRX) 行为。通过系统分析Ni Fe Cr基合金的应力-应变数据和微观结构演化，研究了应变速率、温度和应变对DRX行为临界条件的影响。同时，利用双曲正弦本构方程建立了峰值应力与Z参数相关性的本构方程。建立了所研究合金的DRX临界应变模型、动力学模型和晶粒尺寸模型。形变活化能为496.92 kJ/mol。所研究合金的 DRX 行为对变形温度和应变速率敏感。随着应变速率的降低或变形温度的升高，DRX软化临界应变减小，DRX的体积分数增加。此外，这三种模型可以准确预测和表征所研究合金的 DRX 行为。