Effects of Thermal Spray Coatings on Surface Protection and Mechanical Performance of AlSi10Mg Alloy Produced by Additive Manufacturing

In this study, AlSi10Mg alloy produced by additive manufacturing was produced as a tensile test sample according to ASTM E-8 standard.The produced materials were subjected to coating process with 60% AlO -40% TiO2 and 87% AlO -13% TiO2 powder mixtures at two different rates with powder flame spray coating, which is one of the thermal spray coating methods.After coating, tensile test of the samples was performed and the most suitable mixing ratio of Al2O3 and TiO2 mixtures was determined and the strength ratios were compared.In addition to these, the post-corrosion strength values of the samples subjected to salt spray test after coating were examined and the effects of both different coating rates and corrosion were investigated.The changes on the surface after corrosion process and the fracture surface examinations of the samples after tensile test were examined with scanning electron microscope (SEM).The results showed that the sample coated with 60% Al2O3-40% TiO2 without corrosion process had the highest strength value with a value of 437.65 MPa.It provided an increase of approximately 6% compared to the uncoated and uncorroded material.It was observed that the samples coated with 87% Al2O3-13% TiO2 caused a decrease in the strength value compared to the untreated uncoated sample.