Abstract
The effect of the rapid-solidification melt-spinning process on an Al-4Er alloy has been studied. Compared to the normally solidified master alloy, rapid-solidification processing promotes the formation of a eutectic suppressed, relatively refined microstructure. Varying relative proportions of microstructures occupy the ribbon longitudinal transverse cross section: the featureless zone at the contact surface, the columnar zone in the middle and the equiaxed grains zone with degenerated dendrites at the free surface. The presence of a finely dispersed, coherent Al3Er secondary equilibrium phase in the contact is evident. Ribbon microhardness remains fairly stable up to 200 ° C and at further elevated temperatures retains higher mean values than the master alloy.
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