As a lightweight metal structural material,magnesium alloy has been widely studied and applied,and the de-velopment of a new rare earth magnesium alloy is an important embodiment to further improve the application value of magnesi-um alloy.Ho has a high solid solubility in magnesium,which can significantly refine grains,improve the mechanical proper-ties of the alloy at room temperature and high temperature,and enhance the corrosion resistance of the alloy.In this paper,Mg-Ho binary alloys,Mg-Ho-X(RE,Zn),and Mg-X-Ho(X=Al,Zn,RE)alloys are reviewed.The current research status of Ho-containing magnesium alloys is summarized,and the advantages and disadvantages of current Ho-containing magnesium alloys are pointed out,hoping to provide new ideas for the research of Ho-containing magnesium alloys.
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