Transactions of Materials and Heat Treatment

Title：Research on dynamic mechanical property of super alloy A286 at room temperature

Authors： XIN Xuan-rong LIANG Kun XIE Tian HE Cheng-song

Unit： Henan University of Science & Technology Henan Space Seilko Manufacturing Co. Ltd. Luoyang Qinhan Cold Forging Co. Ltd.

KeyWords： solution treated A286 dynamic mechanical property Johnson-Cook model

ClassificationCode：TG376

year,vol(issue):pagenumber：2013,38(4):144-147

Abstract：

To achieve the numerical simulation of plastic deformation at room temperature and make forming process parameters reasonably,the solution treated A286 rheological mechanics behavior of different strain rates at room temperature was studied by Gleeble-1500D testing machine to discuss the plastic flow stress influence mechanism of strain and strain rate on solution treatment A286. The experimental results show that due to the strain-hardening and the softening caused by adiabatic effect competition, in the high strain rate and strain conditions, the flow stress drops. Solution treated A286 has certain degree of strain rate sensitive. The yield strength increases as strain rate increases at compression condition, when ε=0.65, no break happens, it has a good plasticity. Fitting dynamic plastic constitutive relation of solution treated A286 by simplified Johnson-Cook (J-C) constitutive model was got. The model calculation results and the experimental results show that the model can well predict plastic flow stress in cold deformation of solution treated A286.

Funds：

梁坤（1985-)，男，硕士研究生

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