 The superheating process is a unique grain refining technique which can be applied to aluminum-containing magnesium alloys. This process involves heating the material above its melting point without the addition of any external agents, resulting in the formation of small aluminium particles which act as nucleation sites for the growth of larger alpha-mg grains. These aluminium particles are believed to be responsible for the improved grain refinement observed in the superheated sample compared to the non-superheated one. This article was authored by Sun Si-yong, Yonggopark, and Yongchul Lee.