TB6药型罩锻造过程的织构模拟及与铜和钽锻造的对比

Texture Simulation of Forging Process of TB6 Liner and Its Comparison with Copper and Tantalum Forging

模拟了药型罩用TB6钛合金在不同锻造工艺下的织构形成规律,并与钽和铜的模拟结果对比。首先通过实验与模拟进行对比,验证模拟的可行性,其次通过有限元方法模拟分析了TB6钛合金四方拔长过程中不同部位温度、等效应力和等效应变的差异,之后利用VPSC(粘塑性自洽模型)模拟不同材料锻造工艺下的织构演变规律并进行对比分析。结果表明,体心立方β相和钽中心织构与边部存在较大的不均匀性,面心立方铜织构类型波动较小;多边拔长有利于弱化四方拔长过程中产生的平行于轴向的{110}强织构;压缩型织构在以后的拔长过程中依旧可以保留。

The texture formation of TB6 titanium alloy liner under different forging processes was investigated by simulation,and compared with the simulation results of tantalum and copper.Firstly,the feasibility of the simulation was verified by comparing the experiment with the simulation.Secondly,the difference of temperature,equivalent stress and equivalent strain in different parts of TB6 titanium alloy during square drawing was analyzed by finite element method;after that,visco-plastic self-consistent model(VPSC)was used to simulate the texture evolution of different materials in forging process and a comparative analysis was performed.The results show that the central textures of bccβphase in titanium alloy and Ta are not uniform as well as in the edges,and the fcc copper textures have little fluctuation.The multi-side drawing is beneficial to weaken the{110}strong texture which is parallel to the axial direction during square drawing,and the compression texture can be retained in the drawing process.