Phasefield simulation of the microscopic solidification structure and phase distribution (A08)

A8项目的主要内容是基于考虑对流的热化学数据库对凝固过程中的微观组织进行模拟。对流的模拟直接使用Navier-Stokes方程，也可以采用格子Boltzmann模型。因此，将创建关于显微组织、晶界、偏析图、析出物和塑性的准确信息。根据铝含量的不同，高锰钢只能以y相或两相(y+8)的形式凝固。特别是在MBIP材料中，在凝固结束时会发生包晶转变。局部变形将用细观连续介质模型来模拟。

Main topic of project A8 is the simulation of microstructure during solidification based on thermochemical databases taking convection into account. Simulation of convection is done by using directly Navier-Stokes equations or as alternatively by a Lattice Boltzmann model. So, exact information about the microstructure, the grain boundaries, segregation maps, precipitates and ductility will be created. Depending on the Al content high Mn steels solidify only as a y-phase or as two phases (y + 8). Especially in MBIP materials the peritectic transformation at the end of solidification is expected. The local deformation will be modeled by using a micromechanical continuum model.