航空发动机用Haynes242高温合金热变形行为  

Physical Model of Thermal Deformation Behavior of Haynes242 Superalloy

作　　者：王攀智 龚忠兴 张正 孙青 杨明[2] WANG Panzhi;GONG Zhongxing;ZHAGN Zheng;SUN Qing;YANG Ming(Guizhou Aviation Technical Development Co.,Ltd.,Guiyang 550001,China;Guizhou University,Guiyang 550001,China)

机构地区：[1]贵州航宇科技发展股份有限公司,贵阳550001 [2]贵州大学,贵阳550001

出　　处：《有色金属工程》2023年第2期40-50,共11页Nonferrous Metals Engineering

基　　金：贵州省科技支撑计划项目(黔科合支撑[2022]一般052);中央引导地方科技发展专项([2019]4011)。

摘　　要：采用Gleeble热模拟实验机,在变形温度为950~1100℃、应变速率为0.001~1 s^(-1)条件下进行了热压缩实验,通过对流变应力曲线的分析,建立了Arrhenius本构方程,并对该方程进行了修订,获得了包含变形温度、应变速率及应变量相关的Arrhenius应变补偿本构方程。采用对比及平均误差分析检验本构方程的有效性和精确性发现:修正后的本构方程计算得到的应力值和实验数据吻合较好,方程的相关系数r值为0.967、平均相对误差AARE值仅为7.35%,具有较高的准确性。此外,基于Zener-Hollomon参数建立了Haynes 242合金动态再结晶的临界应变模型,并通过对能耗图和失稳图的绘制获得Haynes 242合金的热加工图,定量揭示了变形工艺参数在变形过程中对组织演化的影响,获得了最优的热加工工艺参数。The thermal compression experiment was carried out by Gleeble thermal simulation experimental machine with the experimental temperature of 950—1100℃,the strain rate of 0.001—1 s^(-1),by analyzing the flow stress curves,the Arrhenius constitutive equation was established and revised,and the Arrhenius strain-compensation constitutive equation including deformation temperature,strain rate and responding variable was obtained.In order to verify the validity of the theoretical values calculated by the constitutive equation,the results show that the theoretical stress value calculated by the modified constitutive equation is in good agreement with the experiment data and has a high accuracy,the calculated theoretical values and the experimental data were compared,and the average error was analyzed with the correlation coefficient revalue of 0.967 and AARE value only of 7.35%.Furthermore,the critical strain model of dynamic recrystallization of Haynes 242 alloy was assisted based on the Zener-Hollomon parameter.By drawing the energy dissipation and the instability criterion diagrams,the hot processing map of Haynes242 alloy under different deformation was obtained,the influence of deformation parameters on microstructure evolution and optimum process parameters were revealed.

关 键 词：Haynes 242合金 本构方程 临界再结晶条件 热变形行为 

分 类 号：TG132.3[一般工业技术—材料科学与工程]