ABSTRACT
This chapter deals with master alloys and other technologies, primarily directed at the grain refinement of aluminum and its alloys. Less discussed, but also very important, are issues of the microstructure formation and resulting properties of cast aluminum alloys as a result of applications of master alloys, modifiers, and special processing methods. Close control of the cast structure is a major requirement in the production of high-quality aluminum alloys. The most recently used method to provide a fine and uniform as-cast grain structure is to add nucleating agents to the melt to control crystal formation during solidification [1–4].
