Numerical Simulation Research on Hot Compression Instability Deformation of SP700 Titanium Alloy [SP700 钛合金热压缩失稳变形数值模拟研究]

作者：Qiu Q.; Wang K.^*; Lu S.; Ouyang D.; Li X.; Zhang K.; Gao X.

来源：Rare Metal Materials and Engineering, 2022, 51(8): 2985-2991.

• hot compression
• numerical simulation
• SP700 titanium alloy
• unstable deformation

Using the experimental data obtained by isothermal and constant strain rate compression of the SP700 titanium alloy on the Gleeble-3800 thermal simulation test machine, the instability map based on the Prasad instability criterion was constructed. The boundary conditions for the thermal compression instability deformation of SP700 titanium alloy when the deformation temperature is 700~950 ℃ and the strain rate is 0.001~1 s-1 were obtained. Based on this, combined with Deform-3D finite element software to analyze the SP700 titanium alloy in the process of hot compression, the distribution and change of the unstable deformation area were studied by finite element numerical simulation. The results show that the microstructure of the SP700 titanium alloy obtained by the hot compression experiment is in good agreement with the finite element numerical simulation results. The Deform-3D finite element software can effectively simulate and predict the distribution and change of the unstable deformation area of the SP700 titanium alloy during the hot compression process.

• 单位
  南昌航空大学