GH2132高温高应变率下力学性能分析与Johnson-Cook本构模型的建立  

Properties at Elevated Temperature and High Strain Rate and Establishment of Johnson-Cook Constitutive Model for GH2132

作　　者：田宪华 闫奎呈 赵军[3] 王情情 王延庆[4] 陈笑然 TIAN Xianhua;YAN Kuicheng;ZHAO Jun;WANG Qingqing;WANG Yanqing;CHEN Xiaoran(School of Mechatronic Engineering,China University of Mining and Technology,Xuzhou,Jiangsu,221116;Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment,China University of Mining and Technology,Xuzhou,Jiangsu,221116;School of Mechanical Engineering,Shandong University,Jinan,250061;School of Material and Physics,China University of Mining and Technology,Xuzhou,Jiangsu,221116)

机构地区：[1]中国矿业大学机电工程学院,徐州221116 [2]中国矿业大学江苏省矿山机电设备重点实验室,徐州221116 [3]山东大学机械工程学院,济南250061 [4]中国矿业大学材料与物理学院,徐州221116

出　　处：《中国机械工程》2022年第7期872-881,共10页China Mechanical Engineering

基　　金：国家自然科学基金(51805534);中国博士后科学基金(2021M703501,2019M661976)。

摘　　要：对铁基高温合金GH2132进行了准静态压缩试验和分离式霍普金森压杆(SHPB)试验,获得了该材料在不同温度和应变率下的应力应变曲线,分析了其力学行为。GH2132在准静态压缩过程中出现加工硬化且没有明显的屈服阶段。在SHPB试验中,GH2132有明显的温度软化效应,当应变率在4000~8000 s^(-1)之间时表现出应变率强化效应,而在8000~10000 s^(-1)范围内表现出应变率软化效应。通过修正温度软化系数和应变率强化参数,建立了GH2132在高温高应变率下的Johnson-Cook本构模型。Quasi-static compression tests and SHPB tests were carried out on superalloy GH2132,and the stress-strain curves of the materials at different temperatures and strain rates were obtained,and then the mechanics behavior were analyzed.GH2132 has a work hardening and unconspicuous yield stage in quasi-static compression processes.During the SHPB tests,GH2132 shows significant temperature strengthening effectiveness as the strain rate is between 4000 s^(-1) and 8000 s^(-1),while the material exhibits strain rate softening effectivenes as the strain rate is between 8000 s^(-1) and 10000 s^(-1),and strain rate softening effectivenes is shown.By modifying temperature softening coefficient and strain rate strengthening parameter,the Johnson-Cook constitutive model of GH2132 with high temperature and high strain rate was established.

关 键 词：铁基高温合金 准静态 分离式霍普金森压杆 本构模型 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]