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[Qiu Qian,Wang Kelu,Lu Shiqiang,Ouyang Delai,Li Xin,Zhang Kaiming and Gao Xin.Numerical Simulation Research on Hot Compression Instability of SP700 Titanium Alloy[J].Rare Metal Materials and Engineering,2022,51(8):2985~2991.]
Numerical Simulation Research on Hot Compression Instability of SP700 Titanium Alloy
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Received:July 11, 2021  Revised:August 10, 2021
DOI:
Key words: SP700 titanium alloy  hot compression  unstable deformation  numerical simulation
Foundation item:国家自然科学基金资助(项目号51761029);江西省研究生创新专项资金项目资助(项目号YC2020-S539)
Author NameAffiliation
Qiu Qian,Wang Kelu,Lu Shiqiang,Ouyang Delai,Li Xin,Zhang Kaiming and Gao Xin  
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Abstract:
      Using the experimental data obtained by isothermal and constant strain rate compression of the SP700 titanium alloy under the Gleeble-3800 thermal simulation test machine, the instability map based on the Prasad instability criterion is 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 are 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 are 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.