考虑应变、应变率和温度耦合作用下航空不锈钢0Cr17Ni4Cu4Nb本构模型的建立  

Establishment of a constitutive model of aviation stainless steel0Cr17Ni4Cu4Nb considering the coupling effects of strain,strain rate and temperature

作　　者：张继林[1] 张又铭 罗文翠[1] 易湘斌[3] 唐林虎[3] 姚家宝 Zhang Jilin;Zhang Youming;Luo Wencui;Yi Xiangbin;Tang Linhu;Yao Jiabao(Gansu Provincial Precision Machining Technology and Equipment Engineering Research Center,Lanzhou Institute of Technology,Lanzhou 730050,Gansu,China;School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116000,Liaoning,China;Key Laboratory of Green Cutting Technology and Application in Gansu Province,Lanzhou Institute of Technology,Lanzhou 730050,Gansu,China;School of Mechanical and Electrical Engineering,Lanzhou Institute of Technology,Lanzhou 730070,Gansu,China)

机构地区：[1]兰州工业学院,甘肃省精密加工技术及装备工程研究中心,甘肃兰州730050 [2]大连交通大学机车车辆工程学院,辽宁大连116000 [3]兰州工业学院,甘肃省绿色切削加工技术及其应用重点实验室,甘肃兰州730050 [4]兰州工业学院机电工程学院,甘肃兰州730070

出　　处：《钢铁钒钛》2023年第6期149-159,共11页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(51965031);甘肃省青年科技基金计划项目(21JR7RA351);甘肃省科技计划项目(22JR11RA156);甘肃省高等学校产业支撑(2021-CYZC-52);甘肃省重点人才项目(甘组通字[2022]77号);国家级大学生创新创业训练计划项目(DC2201-07)。

摘　　要：航空不锈钢0Cr17Ni4Cu4Nb具有优良的特性,广泛应用在各个机械的重要零部件上,零件的加工过程伴随着大应变、高温和高应变率,基于此考虑耦合关系建立能够真实反映切削力学性能的本构模型,为切削仿真提供可靠的数据。以航空不锈钢0Cr17Ni4Cu4Nb为研究对象,利用万能试验机(UTM5305)和高温分离式霍普金森试验装置(Split Hopkinson Pressure Bar,SHPB,ALT1000)分别进行准静态压缩试验(温度为25℃,应变率为0.1、0.01、0.001s^(-1))和动态冲击试验(温度为25、350、500、650℃,应变率为750、1500、2000、2600、3500、4500 s^(-1)),获得该材料的应力应变关系,并分析其力学性能,结果表明该材料具有应变硬化效应、温度软化效应、应变率强化效应和增塑效应。综合应变、应变率和温度三者相互作用,建立耦合作用下的Johnson-Cook(JC)本构方程,统计分析了试验数据与预测数据(原JC本构方程和修正JC本构方程数据),原JC本构方程的相关系数(R)和平均相对误差(AARE)分别为0.96833和4.77%;修正JC本构方程的相关系数(R)和平均相对误差(AARE)分别为0.987513和0.51%,表明修正JC本构方程更加准确、可靠预测高应变率下应力应变的关系。The aviation stainless steel 0Cr17Ni4Cu4Nb has excellent characteristics and is widely used in important parts of various machines.The machining process of these parts is accompanied by large strain,high temperature and high strain rate.Based on this coupling relationship,a constitutive model that can truly reflect the cutting mechanical properties is established to provide reliable data for cutting simulation.This paper sets the aviation stainless steel 0Cr17Ni4Cu4Nb as the research object,and uses the universal testing machine(UTM5305)and the split Hopkinson Pressure Bar(SHPB,ALT1000)to carry out the quasi-static compression tests(temperature:25℃,strain rate:0.1,0.01,0.001 s^(-1))and dynamic impact tests(temperature:25,350,500 and 650℃,strain rate:750,1500,2000,2600,3500and 4500^(s-1)),respectively.The stress-strain relationship of the material is obtained,and its mechanical properties are analyzed.It is shown that the material exhibits strain hardening effect,temperature softening effect,strain rate strengthening effect and plasticizing effect.Combining the interaction of strain,strain rate and temperature,the Johnson-Cook(JC)constitutive equation under the coupling action is established.The test data and prediction data(the original and modified JC constitutive equation)are statistically analyzed.The correlation coefficient(R)and the average phase error(AARE)of the original JC constitutive equation are 0.96833 and 4.77%,respectively.The correlation coefficient(R)and average relative error(AARE)of the modified JC constitutive equation are 0.987513 and 0.51%,respectively,indicating that the modified JC constitutive equation is more accurate and reliable in predicting the stress-strain relationship at high strain rates.

关 键 词：航空不锈钢 0CR17NI4CU4NB JC本构模型 应变率强化 增塑效应 耦合作用 

分 类 号：TG115.5[金属学及工艺—物理冶金] TG142.1[金属学及工艺—金属学]