Grain Refinement by Electromagnetic Stirring and the Impact on the Mechanical Properties of AlSi-Alloys

摘要：

　　This present study examines the directional solidification of AlSi7 alloys from a water cooled copper chill.A rotating magnetic field was used for melt agitation.Different magnetic field configurations were considered to demonstrate the impact of diverse flow conditions on the resulting microstructure and the mechanical properties.The solidified structure was evaluated in comparison to an unaffected solidified ingot.Measurements of the phase distribution,the grain size,the hardness and the tensile strength were performed.Our results reveal the potential of magnetic fields to control the grain size,the formation of segregation freckles and the mechanical properties.In particular,time–modulated rotating fields demonstrated their capability to homogenize both the grain size distribution and to improve the mechanical properties.

关键词： rotating magnetic field solidification grain refinement mechanical properties AlSi alloys

作者: R(A)BIGER Dirk KR(Oβ)IG Christoph ECKERT Sven GERBETH Gunter

作者单位: Helmholtz-Zentrum Dresden-Rossendorf,01314 Dresden,Germany

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）