Arc smelting suction casting and melt spinning methods were used to rapidly solidified commercial Al-Ti-B master alloy

respectively.The microstructure changes

grain refining effects and fading resistance of the rapid solidification processed Al-5Ti-B master alloys were investigated.The results reveal that the arc smelting suction casting and melt spinning processing can transform the bulky plate-like TiAl3 phase existing in the microstructure of the commercial Al-Ti-B master alloy to fine and uniformly distributed acicular or granular phases

and eliminate the aggregation of TiB2 particles to make them more evenly distribution.The rapid solidification processing can improve obviously the grain refining effect of the Al-5Ti-B master alloy

and reduce the usage of the mater alloy.The fading grain refining effects of the rapid solidification processed Al-5Ti-B master alloys is absent

and can always keep good grain refining abilities during the long-term holding.