Alignment of primary Al3Ni phases in hypereutectic Al-Ni alloys with various compositions under high magnetic fields.

Al-Ni hypereutectic alloys with various compositions were solidified under various magnetic field conditions to investigate the alignment of primary Al₃Ni phases. The results showed that the application of high magnetic fields could improve the homogeneity of the primary Al₃Ni phase distribution and induce the alignment of primary Al₃Ni phases in the direction perpendicular to the magnetic field direction to form chain-like structures. However, the alignment was different from the orientation of the Al₃Ni phases. Furthermore, the degree of the alignment decreased with the increasing concentration of Ni element. This can be attributed to the combination effects of high magnetic field and alloy composition on the concentration field around the crystallized primary Al₃Ni crystals. [ABSTRACT FROM AUTHOR]