Research Progress on Rare Earth Aluminium Alloy Modification

The research progress of rare earth on pure Al,ZL101alloy,A356alloy,Al-Si-Mg alloy,hypereutectic Al-Si alloy modification are discussed.Primaryα-Al phase changes from dendritic to equiaxe with rare earth addition,at the same time the grain refinement and mechanical properties increased,the silicon phase changed from long needle into spherical and rod.The tensile strength,yield strength and elongation are greatly improved which means the rare earth has modification effect on aluminum alloy.Rare earth modification technology is an effective way to improve the structure of aluminum alloy and mechanical properties.