Control and Analysis of Defects in AlSi10Mg Alloy Formed by Selective Laser Melting with Process Parameters
It was investigated that the effect of process parameters on the structure property of selected laser melting(SLM)AlSi10Mg,and AlSi10Mg samples were formed under different process parameters.The results indicated that the laser power of 350 W was the optimal heat input,which could control the thermal capillary convection and surface tension during the forming process in the most favorable stat for alloy quality.The scanning interval of 0.09 mm was the optimal parameter for the overlap rate of the molten pool,which could not only allow sufficient liquid phase to enter the overlap zone,but also minimize the defects caused by multiple thermal effects in the overlap zone.At a laser power of 350 W and a scanning distance of 0.09 mm,the density of the formed sample was the highest(99.2%)with the least defects.The com-prehensive mechanical properties of the sample were the best with the tensile strength 495.02 MPa,the elongation 9.675%,and the microhardness 135.67 HV.
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