Research status of selective laser melting of Al-Mg-Sc-Zr alloy
Aluminium alloys are widely used in industry because of their low density and high strength-to-mass ratio. However,due to the susceptibility to thermal cracking during the solidification process of traditional high-strength aluminium alloys,the development of additively manufactured high-strength aluminium alloys has been relatively slow,and only very few high-strength aluminium alloys can be processed by selective zone laser melt-ing at present. The research progress of the types,forming process and performance of selective laser melting high-strength aluminium alloys is summarized,and it is concluded that the addition of Zr and Sc elements to inhibit solidification cracks and improve the strength of high-strength aluminium alloys has become a trend in the research and development of selective laser melting high-strength aluminium alloys. The research status of the forming process of selective laser melting high-strength aluminium alloys and the performance of selective laser melting high-strength aluminium alloys are discussed. The mechanism of adding elements such as Zr and Sc in selective laser melting high strength aluminium alloys is discussed,and the future development trend of selective laser melting high strength aluminium alloys is pointed out.
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