ANALYSIS OF MACROSEGREGATION FORMATION UNDER THE APPLICATION OF VARIOUS TYPES OF MAGNETIC FIELDS

摘要：

The effect of a forced convection on the segregation of a binary alloy during the solidification is investigated by means of a columnar model of solidification. The model is based on an Euler-Euler two phase model with fixed solid phase coupled with a dendrite envelope model. The numerical model is applied on a Bridgman-type configuration with Al-Si and Pb-Sn alloys. During its solidification, the liquid phase is submitted to a forced convection which is driven by various types of magnetic fields, namely rotating magnetic fields, travelling magnetic fields and modulated travelling magnetic fields. The relative distribution and the intensity of the imposing electromagnetic force field are studied. It is shown that the flow patterns strongly influences the segregation characteristics. The change of segregation pattern comes from pressure distribution ahead of the growth interface. A certain period of modulation magnetic force can suppress the macrosegregation.

关键词： solidification macrosegregation electromagnetic stirring segregation control numerical modelling

作者: X.D. WANG A. Ciobanas Y. Fautrelle G. Zimmermann A. Weiss

作者单位: EPM/SIMAP/CNRS, BP 75, 38402 Saint Martin dHeres, France ACCESS, e.V. Aachen, Germany

会议类型: 国际会议

会议名称: 第七届环太平洋铸造及凝固过程模型化国际会议(The 7th Pacific Rim International Conference on Modeling of Casting and Solidificetion Process(MCSP7-2007))

会议地点: 大连

会议语种:英文

页码: 389-395

在线出版日期: 2007-08-19（万方平台首次上网日期，不代表论文的发表时间）