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It was previously found that peritectic-forming solutes are more favourable for the grain refinement of cast Al alloys than eutectic-forming solutes. In this work, we report that the eutectic-forming solute, Mg, can also significantly grain refine cast Zn. Differential thermal analysis (DTA) of a Zn–Mg alloy, in which efficient grain refinement occurred, evidenced an unexpected peak that appeared...
Silver (Ag) inoculation was found to significantly reduce the average grain size of cast zinc (Zn) by up to 90%. The mechanism of such grain refinement in cast Zn was investigated through varying the addition level of this peritectic-forming solute. The reduction in grain size was sensitive to Ag content due to its large growth restriction factor. When the Ag content was over its maximum solid solubility...
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