电流改变定向凝固单相合金枝晶间距机理

Mechanism of Dendrite Armapace of Unidirectional Solidification Single-phase Alloy with Influence of Electric Current

摘要: 基于M-S理论的基本思路建立了电流作用下的凝固界面形态稳定性动力学微分方程式,并讨论了电流强度对稳定性及凝固过程达到稳定状态时所对应的扰动频率的影响.在此基础上讨论了电流改变定向凝固单相合金枝晶间距的机理.

Abstract: Based on the solidification fundamental principle given by Mullins and Sekerka, sets up the differential equations of solidification interface morphology stability kinetics in the electric current.The effects of electric current strength on stability and the homologous disturbance frequency of stable state in solidification process are discussed.On the basis of these analyses, the relationship of directional solidification microstructure morphology and the electric current strength is also discussed.