The fluidities of a series of binary and ternary aluminum-nickel alloys were determined using the vacuum fluidity tester. Fluidity, as a function of weight ％ Ni, in the Al-Ni system was found to reach a maximum at 7.0％-7.5％ Ni, which is the non-equilibrium eutectic composition. Silicon and beryllium were found to decrease the fluidity of aluminum-nickel alloys in those compositions tested. Iron was detected to be capable of increasing the fluidity of some aluminum-nickel compositions. Reduction in fluidity was related to an increased tendency towards constitutional supercooling during solidification.
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