Optimization of Process Parameters of TA5 Titanium Alloy Based on Response Surface Methodology

作者：Wang Jun; Wang Kelu^*; Lu Shiqiang; Li Xin; Ouyang Deilai; Qiu Qian; Gao Xin; Zhang Kaiming

来源：RARE METAL MATERIALS AND ENGINEERING, 2022, 51(6): 2130-2136.

• TA5 titanium alloy
• flow stress curve
• response surface methodology
• process parameter optimization

Isothermal constant strain rate compression test of TA5 titanium alloy was carried out by Gleeble-3800 thermal simulator at temperature of 850 similar to 1050 degrees C, strain rate of 0.001 similar to 10 s(-1) and maximum deformation of 60%. According to the experimental data, the flow stress curve of TA5 titanium alloy was analyzed, and the material parameters (deformation activation energy, Z parameter and power dissipation coefficient) were calculated under different process parameters. In addition, the prediction model of process parameters and material parameters was established by response surface method. Finally, the optimized process parameters were obtained by multi-objective visualization optimization. The results show that the flow stress of TA5 titanium alloy has negative temperature correlation and positive strain rate sensitivity. The prediction model based on the response surface methodology has high accuracy, and the optimized machining parameters range is 850 similar to 990 degrees C/0.004 similar to 0.15 s(-1). The main deformation mechanisms of this region are dynamic recovery and dynamic recrystallization.

• 单位
  南昌航空大学