Özet:

The most widely used additive manufacturing method in dentistry is the selective laser melting (SLM) system. The popularity of SLM systems for the manufacture of cobalt-chromium alloy powders is increasing day by day. The aim of this study is to investigate the effect of changing the laser power and layer thickness parameters during the production process of Co-Cr metal substructures produced by the laser sintering method on the tensile strength and elongation at fracture of the metal substructure. A total of 120 dumbbell-shaped samples were produced with a diameter of 3 mm and a length of 18 mm. The samples were produced at different layer thicknesses and under different laser powers. For 20 and 30 µm layer thicknesses, 4 different laser powers ranging from 50-200 W were produced with the TruPrint 1000 laser metal fusion system and its mechanical properties were tested with the tensile test. Conformity to the normal distribution was evaluated using the Shapiro-Wilk test. The two-way ANOVA method was used to examine the effects of laser power and layer thickness effects and interaction on tensile strength and elongation values, and multiple comparisons were made with Bonferroni test. The variation of laser power and layer thickness in the SLM manufacturing process partially affects the mechanical properties. While laser power and layer thickness affect tensile strength, laser power affect elongation, and the effect of layer thickness on elongation was not found significant.

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