-1的條件下進(jìn)行失穩(wěn)變形組織和動態(tài)再結(jié)晶行為的模擬和預(yù)測，并通過對比金相組織，驗證了該模擬結(jié)果的可靠性。結(jié)果表明，流動應(yīng)力隨變形溫度的升高或應(yīng)變速率的降低而降低；失穩(wěn)變形組織集中在低溫、高應(yīng)變速率區(qū)域；高溫和低應(yīng)變速率均有利于動態(tài)再結(jié)晶（DRX）行為；微觀組織的觀察結(jié)果與模擬預(yù)測的結(jié)果吻合較好，說明本研究提出的加工圖技術(shù)與有限元技術(shù)相結(jié)合的方法對模擬與預(yù)測金屬鍛造過程中的失穩(wěn)變形組織和DRX行為是可行的。;The thermal parameter boundary conditions of the unstable deformation microstructure and dynamic recrystallized microstructure of BT25 titanium alloy were determined by the instability maps and power dissipation maps, respectively. The results were used in the Deform-3D finite element (FE) software to effectively combine the processing map technique with FE technique. The FE codes after secondary development were used to simulate and predict the unstable deformation zones and dynamic recrystallization (DRX) behavior of BT25 titanium alloy at the deformation temperature of 950~1100 °C and the strain rate of 0.001~1 s-1. The reliability of simulation results was verified by metallographic microstructure. Results show that the flow stress is decreased with increasing the deformation temperature or decreasing the strain rate. The unstable deformed microstructure is concentrated in the region of low temperature and high strain rate. Both high temperature and low strain rate are beneficial to DRX behavior. The results of metallographic microstructure are in good agreement with those of simulation, indicating that the method of combining processing map technique and FE technique is reliable and feasible for predicting the unstable deformed microstructure and DRX behavior in the metal forging process."/>