ABSTRACT The influence of solidification parameters on the morphology of a number of meltspun Nickelbased
hard alloys has been investigated by means of scanning electron microscopy (SEM),
conventional transmission electron microscopy and energy dispersive X-ray analysis (EDXA). It
was established that the wheel velocity played a prominent role in the types of microstructure
observed. Very high wheel velocity could lead to the formation of amorphous structure as
observed in some of the alloys investigated. No appreciable effect of the ribbon thickness was
observed on the microhardness of the alloys. It was also reported that the thermal transfer mode
between the ideal and newtonian coolings was observed in all the alloys investigated.
Cite this paper
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