At laser power of 330 W,AlSi10Mg alloy was formed by selective laser melting(SLM)with and without a magnetic field(0,150 mT),and the effect of magnetic field on the microstructure and properties of the SLMed alloy was studied.The results show that the alloy structure with and without magnetic field is composed of α-Al and Si phases,indicating that the introduction of magnetic field has no effect on the alloy phase.Under magnetic field of 150 mT,the damping effect in the molten pool reduces the flow velocity,suppresses the formation of pores,and increases the density of the alloy.The relative density increases by about 0.4％,and the hardness increases by about 11.8％.Compared with the SLMed AlSi10Mg alloy without magnetic field,the alloy has better ultimate tensile strength and ductility under 150 mT magnetic field,with an increase in tensile strength of about 55 MPa and an increase in elongation of about 0.8％.
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