Effects of geometrical characteristics on defect distributions in alloy components produced by selective laser melting

Selective laser melting (SLM) has been applied to manufacture various alloy components with excellent properties, but its further application is restricted by the intrinsic defects. In this work, internal defect distributions in samples of three alloys (316L stainless steel, AlSi10Mg and Inconel 718) were investigated respectively, considering effects geometrical characteristics samples. The defects 316L steel sample tend be formed densely central part large wall thickness, indicating a strong sensitivity heat accumulation. Contrarily, 718 shows higher relative density homogeneous distribution, better formability for SLM process. For sample, keeps increasing as deposition goes on. Typically, located at edges an abnormally high level comparing inner part, especially top sections results are helpful design, adjustment building orientation optimization process parameters