磁场作用下铝合金的微观结构

Effect of Magnetic Field During Solidification on Microstructure of Three Al Alloys

研究了铝锌、铝镁、铝铜二元合金分别在直流磁场、交流磁场或脉冲磁场中凝固后的微观结构·结果表明 ,在各种磁场中凝固的试样与未经磁场处理的试样相比 ,X射线衍射谱中的(111)晶面的衍射峰一般得到增强·在磁场中凝固的试样 ,其晶格常数均有明显变化 ,溶质元素在α Al中的固溶度均有显著增加·

The microstructures of Al-5 5Zn, Al-2 5Mg and AL-1 5Cu alloys were studied after a stationary magnetic field, alternating magnetic field or a pulsed magnetic field is applied during solidification. X-ray diffraction was used to study the structural properties of the three Al alloys. It was found that, in the diffraction patterns, the diffraction peaks (111) were generally strengthened of the samples applied with one of the magnetic fields, and the preferred orientation of planes (111) were came into being. Otherwise, the lattice constant of Al-5 5Zn and AL-1 5Cu alloys was obviously decreased and that of Al-2 5Mg alloy was notably increased. The energy-dispersive analysis showed that the solid solubility inside α-Al of solute element obviously increased for the samples solidified under the magnetic fields.