锻压技术

Fe2Ni2CrAl高熵合金热变形行为及热加工图

英文标题：Hot deformation behavior and hot processing map of high-entropy alloy Fe2Ni2 CrAl

单位：河钢材料技术研究院

分类号：TG139

出版年,卷(期):页码：2025,50(7):255-262

摘要：

针对Fe2Ni2CrAl高熵合金热加工过程极易开裂的问题，利用Gleeble-3800热模拟试验机进行了应变速率为0.001、0.01和0.1 s-1，温度为1173、1273、1373和1473 K的热压缩试验。结果表明：在应变速率不变的前提下，流变应力随变形温度的升高而降低；在变形温度不变的前提下，流变应力随应变速率的增加而增加。利用Arrhenius方程结合相关材料参数，构建并修正了该高熵合金的本构方程。结果表明，修正后的本构方程对Fe2Ni2CrAl高熵合金具有较好的预测精度。基于动态模型（DMM）理论计算并得到了Fe2Ni2CrAl高熵合金的热加工图，确定了其适宜的热加工区间为：温度为1420~1473 K，应变速率为0.001 s-1。

To address the problem that high-entropy alloy Fe2Ni2CrAl is very susceptible to cracking during the hot working process, thermal compression experiments were carried out using the Gleeble-3800 thermal simulation testing machine with the strain rates of 0.001, 0.01 and 0.1 s-1 and the temperatures of 1173, 1273, 1373 and 1473 K. The results show that the rheological stress decreases with the increasing of deformation temperature under the condition of constant strain rate, and increases with the increasing of strain rate under the condition of constant deformation temperature. Using the Arrhenius equation combined with relevant material parameters, the constitutive equation of this high-entropy alloy was constructed and corrected. The results show that the corrected constitutive equation has better prediction accuracy for Fe2Ni2CrAl high-entropy alloy. Based on the dynamic material model (DMM) theory, the hot processing map of Fe2Ni2CrAl high-entropy alloy is calculated and its suitable hot processing interval is determined as:the temperature of 1420 K and the strain rate of 0.001 s-1.

基金项目：

河北省科技重大专项（22281007Z）

作者简介：郭瑞华（1993-），男，硕士，工程师 E-mail：guoruihua@hbisco.com 通信作者：张福利（1984-），男，硕士，正高级工程师 E-mail：zhangfuli@hbisco.com

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