Plastic Flow Modeling of Ti-5 Al-2 Sn-2 Zr-4 Mo-4 Cr Alloy at Elevated Temperatures and High Strain Rates
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第3期
论文作者：王宝林 AI Xing 刘战强 LIU Jigang
文章页码：611 - 616
摘 要：The true stress-strain relationships of Ti-5Al-2Sn-2Zr-4Mo-4Cr（TC17） alloy with a wide range of strain rates were investigated by uniaxial quasi-static and dynamic compression tests, respectively. Quasistatic compression tests were carried out with Instron 8874 test machine, while dynamic compression tests were performed with the split Hopkinson pressure bar（SHPB） which was installed with heating device and synchroassembly system. The dynamic mechanical behaviors tests of TC17 were carried out from room temperature to 800 ℃ at intervals of 200 ℃ and at high strain rates（5 500-1 9200 s-1）. The stress-strain curves considering temperature-strain rate coupling actions were obtained. The Johnson-Cook constitutive model was developed through data fi tting of the stress-strain curves. The material constants in the developed constitutive model can be determined using isothermal and adiabatic stress-strain curves at different strain rates. The Johnson-Cook constitutive model provided satisfi ed prediction of the plastic fl ow stress for TC17 alloy.
王宝林1,2，AI Xing2，刘战强2，LIU Jigang2
1. School of Mechanical &Automotive Engineering, Qilu University of Technology2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University
摘 要：The true stress-strain relationships of Ti-5Al-2Sn-2Zr-4Mo-4Cr（TC17） alloy with a wide range of strain rates were investigated by uniaxial quasi-static and dynamic compression tests, respectively. Quasistatic compression tests were carried out with Instron 8874 test machine, while dynamic compression tests were performed with the split Hopkinson pressure bar（SHPB） which was installed with heating device and synchroassembly system. The dynamic mechanical behaviors tests of TC17 were carried out from room temperature to 800 ℃ at intervals of 200 ℃ and at high strain rates（5 500-1 9200 s-1）. The stress-strain curves considering temperature-strain rate coupling actions were obtained. The Johnson-Cook constitutive model was developed through data fi tting of the stress-strain curves. The material constants in the developed constitutive model can be determined using isothermal and adiabatic stress-strain curves at different strain rates. The Johnson-Cook constitutive model provided satisfi ed prediction of the plastic fl ow stress for TC17 alloy.
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