Solute Effect on Grain Refinement of Al- and Mg-Alloys: An Overview of the Recent Advances Made by the LiME Research Hub

Grain refinement is of importance for metallic materials since it provides multiple benefits, such as improved castability, reduced casting defects and mechanical properties. From extensive research carried out in the past decades, has been widely accepted that solute one crucial factors achieving grain refinement. However, a complex phenomenon, depending on not only solutes melt to provide growth restriction but also physical chemical nature nucleant particles (either endogenous or exogenous). Although significant progress made subject, some critical questions still remain open, comprehensive understanding mechanisms effect desirable. In this paper, we present an overview based our recent advances LiME Research Hub. This covers nucleation potency due interfacial segregation, columnar equiaxed transition (CET), eventually overall