基于元胞自动机的TA15板材累积叠轧微观组织预测

Cellular Automata Based Microstructure Prediction in Accu-mulative Roll-Bonding of TA15 Sheets

摘要:

为研究累积叠轧过程中TA15钛合金微观组织的演变规律，首先利用DEFORM有限元软件模拟了不同累积叠轧工艺对板材成形热参数的影响，在此基础上通过元胞自动机模拟了TA15钛合金累积叠轧后组织的动态球化过程。结果表明，在累积叠轧过程中，通过减少单道次变形、降低轧制速度并保持一定的温度，可有效地改善TA15钛合金的微观组织和性能。将元胞自动机动态球化模型导入Deform-3D软件，成功地模拟了在热压缩和累积叠轧过程中微观组织的演变。

关键词:TA15钛合金;累积叠轧;数值模拟;元胞自动机

Abstract:

The influence of different cumulative rolling processes on the distribution of thermal parameters of sheet was simulated using DEFORM commercial finite element software. The dynamic globularization process of TA15 titanium alloy after thermal compression and cumulative rolling was simulated by the cellular automata. The result shows that during the accumulative roll bonding (ARB) process, the microstructure and properties of TA15 titanium alloy can be effectively improved by reducing the deformation of single pass and rolling speed as well as maintaining a certain temperature. A reasonable dynamic globularization cellular automata (CA) model was imported into Deform-3D commercial finite element simulation software and the microstructure evolution was simulated in the process of thermal compression and accumulative rolling-bonding.

Key words:TA15 titanium alloy;accumulative roll bonding;numerical simulation;cellular automata