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为模拟工业纯钛的微观组织演变过程,利用Gleebe-1500D实验机对工业纯钛进行热模拟压缩实验,变形温度为700、800、900和950℃,应变速率为0.01、0.1、1和5 s-1。对实验得到的数据进行处理,建立工业纯钛Laasraoui-Jonas(L-J)位错密度模型,结合Deform-3D软件对工业纯钛的微观组织演变过程进行模拟,并和实验所得到的微观组织进行比较。结果表明,工业纯钛在热压缩过程中,随着变形量的增加,位错密度先增大再减小,材料内部微观组织发生回复与再结晶;再结晶晶粒的模拟结果与实验结果较吻合,所建立的L-J位错密度模型是合理的。
In order to simulate the microstructure evolution of industrial pure titanium, the thermal simulation of pure titanium was carried out on a Gleebe-1500D machine at deformation temperatures of 700, 800, 900 and 950 ℃ with strain rates of 0.01, 0.1, 1 and 5 s -1. The experimental data were processed to establish the Laasraoui-Jonas (LJ) dislocation density model of industrial pure titanium. The microstructure evolution of industrial pure titanium was simulated with Deform-3D software and compared with the experimental microstructure . The results show that the density of dislocation first increases and then decreases with the increase of the deformation during the process of thermal compression, and the microstructure of the material is recovered and recrystallized. The simulation results and experimental results of the recrystallized grains Anastomosis, the established LJ dislocation density model is reasonable.