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.
作者
田宪华
闫奎呈
赵军
王情情
王延庆
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)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
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)。
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
iron-based superalloy
quasi-static
split Hopkinson pressure bars(SHPB)
constitutive model
