In this study,we investigate the influence of the forming process on the types,sizes,and quantities of internal defects in a GH3536 alloy fabricated via laser selective melting.We test the microstructure,density,and defect quantity,along with the defect type,size distribution,and quantity of the alloy.The research shows that a change in the process parameters gradually increases the energy density,with the density of the formed parts gradually increasing before stabilizing.The sample is uniform and dense without defects within 79.17-92.59 J/mm3 of the energy density.With the gradual increase or decrease in the energy density,the internal defects of the sample are mainly pore-type defects with a pore size＜0.1 mm.When the energy density ≤48.87 J/mm3,non-fusion and micro cracks primarily constitute the internal defects of the sample.
selective laser meltingGH3536 super alloyprocess parameterdefect
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