Akademik Veri Yönetim Sistemi
Optics and Laser Technology, cilt.202, 2026 (SCI-Expanded, Scopus)
Selective laser melting (SLM) is an advanced additive manufacturing technique that can be used to produce components with complex geometries from Ti6Al4V alloy. However, the mechanical properties of parts produced by SLM are highly sensitive to process parameters. This study investigated the effects of laser power, scan speed, and hatch spacing on the elastic modulus and microhardness of Ti6Al4V alloy fabricated by the SLM method were investigated using Response Surface Methodology (RSM) based on a Box–Behnken experimental design. Tensile and Vickers microhardness tests were performed on the specimens produced according to the established experimental plan, and the obtained results were statistically evaluated using regression analysis and analysis of variance (ANOVA). The results revealed that the elastic modulus was predominantly influenced by laser power and hatch spacing, while scan speed exhibited a second-order (nonlinear) effect. In terms of microhardness, laser power and hatch spacing showed statistically significant linear and interaction effects, whereas scan speed had a limited influence. The developed regression models were found to explain more than 90% of the total variance for both mechanical properties. Within the scope of multi-response optimization, the microhardness was maximized while the elastic modulus was targeted to be close to the values reported in the literature for SLM-fabricated Ti6Al4V alloys. Following optimization, the predicted optimum values for laser power, scan speed and hatch spacing were found to be approximately 150 W, 1199.5 mm/s and 60 µm, respectively. For these parameters, the elastic modulus and microhardness were estimated as 116,900 MPa and 678.49 HV0.1, respectively.