Research on the formation process of selective laser melting Mg-Y-Sm-Zn-Zr alloy

Selective laser melting technology was proposed to form the multi-element mixed rare earth magnesium alloys of Mg-3.4Y-3.6Sm-2.6Zn-0.8Zr (wt-%). The formation process, relative density, evaporation, microstructure and microhardness of the deposited samples at different laser power and scanning speed were characterised. Under the experimental conditions with a laser power of 40 W and a scanning speed of 300 mm s(-1), the maximum relative density of the sample is 98.6%. The evaporation of elements exists but is not serious under all process parameters. Compared with the as-cast process, the microstructure of the samples prepared by SLM is mainly composed of alpha-Mg matrix and (Mg, Zn)(3)(Y, Sm) eutectic phase, Mg-12(Y, Sm)Zn eutectic phase and LPSO structure are not found.

Automated summary

Selective laser melting technology was used to form multi-element mixed rare earth magnesium alloys, and the characteristics of deposited samples at different laser power and scanning speed were studied. The samples showed high relative density under specific experimental conditions.