Grain refinement during solidification

March 7, 2010

Grain refinement in highly undercooled solidification of Ni85Cu15 alloy melt; direct evidence for recrystallisation mechanism

T Zhang et al

The grain refinement occurring upon rapid solidification of undercooled Ni85Cu15 alloy melts has been studied. Applying theoretical calculations for stress accumulation in dendritic skeletons, the grain refinement occurring with ΔT >not, vert, similar180K is ascribed to the plastic deformation of dendrites and the subsequent recrystallization. This has been evidenced directly using high resolution transmission electron microscopy (HRTEM) observation for the as-solidified granular crystals.


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