No abstract

Fused deposition modelling (FDM) additive manufacturing is a technology that works horizontally and vertically in which an extrusion nozzle moves on a building platform. Knowing the mechanical properties of the parts manufactured by the FDM method is very important for the parts to work efficiently in places of usage. Additive manufacturing with the FDM method is widespread due to its advantages such as easy-to-use features, low cost, flexibility in material options, and less processing after printing. Two different polymer materials (PLA and ABS), tensile, compression test and 3 point bending tests, a total of 36 test specimens were printed on the FDM type printer. The samples obtained were subjected to mechanical tests to determine their mechanical properties. As a result of the study, the effect of the samples' mechanical properties produced by the PLA and ABS-based FDM method was examined and compared with the literature. The results showed that the mechanical properties of PLA and ABS material are highly dependent on the filling density. While the mechanical properties were improved by the increase in filling density rate, the print speed has been decreased. The research findings obtained are of a nature that will guide the optimization of the FDM method's parts in terms of mechanical properties.

Osseointegration processes of Massive vs. porous implants were compared. It was observed that cells were concentrated on the surface of Massive implants. Therefore, osseointegration between implant and bone was less than that of porous implants. In transitive porous implants, as opposed to Massive implants, an outer region was formed in the bone-implant interface that allowed tissue development.

Meslek yüksekokulunun amacı, mesleki ve teknik eğitimde bilim ve teknolojik alanda gelişmelere uyum sağlayabilecek, endüstrinin ihtiyaç duyduğu nitelikli, kaliteli ara kademe insan gücünü yetiştirmektir. Çalışma bu amaca yönelik Senirkent Meslek Yüksekokulu kapsamında 3 boyutlu (3B) baskı teknolojisinin eğitimde uygulanabilirliği test etmeyi hedeflemektedir. Bu hedefe bağlı olarak, 3B baskı teknolojisi ile jet motoru, otomotiv diferansiyeli ve robot kol prototip tasarımı ve imalatı gerçekleştirilmiştir. Bunun yanı sıra çalışma kapsamında nitel araştırma desenlerinden fenomenolojik desen tasarlanmıştır. Katılımcılar amaçsal örnekleme yöntemlerinden ölçüt örnekleme yöntemiyle seçilmiş, bu doğrultuda ön lisans programında öğrenim gören son sınıf 6 kişi ile yarı-yapılandırılmış görüşme tekniği kullanılarak veriler toplanmıştır. Elde edilen bulgular; iki ayrı tema halinde kategorize edilmiştir. Gerçekleştirilen çalışma neticesinde öğrencilerin, 3B baskı teknolojisinin eğitimde uygulanabilirliği ile 3B düşünebilme kabiliyetin elde edilmesi sağlanmıştır. Ayrıca öğrencilerin, analitik düşünme ile zihinsel, mesleki ve toplumsal gelişimlerine olumlu katkı sağladığı görülmüştür. Sanayiye nitelikli teknik eleman yetiştiren meslek yüksekokullarında 3B baskı teknolojisi yenilikçi eğitim uygulamalarının, ülkemizin "Dijital Dönüşüm" devrimini gerçekleştirmesine olumlu katkı sağlayacağı düşünülmektedir.

Porous implant made of titanium  Forming the outer surface of the implant (shell region) from semi-spherical micropores (controlled porous)  Effects of using different scanning strategies and different manufacturing parameters in additive manufacturing on mechanical properties

No abstract

The most critical component of Industry 4.0, the new face of the machinery-manufacturing industry sector, is metal additive manufacturing. Laser-based additive manufacturing techniques are dominant for metal additive manufacturing today. In this study, the metal alloy studied is Ti-6Al-4V, one of the essential Ti alloys used in more than 50% of all commercial Ti applications. Ti-6Al-4V parts produced by additive manufacturing are used in the biomedical, aerospace-defence industry, and industrial areas due to their high strength, fatigue behaviour, fracture strength, good corrosion resistance, and biocompatibility. In the study, samples of Ti6Al4V alloy were produced with different manufacturing parameters by the direct metal laser sintering (DMLS) method, which is one of the powder bed fusion methods. Then, the surface qualities of the samples were processed by milling and wire EDM. The effects of machining operations on the surface roughness of the samples were investigated and compared with the surface roughness obtained from the samples produced by the DMLS method. After the optical microscope images of the samples were taken, the physical and surface morphology were examined. Although the mechanical properties of the parts manufactured by DMLS methods were higher, the samples with machining presented higher machinability with lower forces, lower surface roughness. the This is explained that mechanical properties of samples of Ti6Al4V alloy in additive manufacturing are highly dependent on the rapid cooling of the material. Results show that samples of Ti6Al4V manufactured by additive manufacturing has been possible using with machining.

In this study, samples manufactured with polylactic acid (PLA) plastic material using the fused deposition modeling (FDM) type printer were analyzed during the manufacturing process using image processing and real-time big data analysis. The purpose of real-time big data analysis is to provide an effective and efficient guide to the user in the manufacturing process regarding the manufactured part’s mechanical properties. In this study, compression samples were prepared according to ASTM D695-15, Standard Test Method for Compressive Properties of Rigid Plastics, test standards and subjected to mechanical tests. In the first stage of the research, using artificial neural networks (ANNs), processing parameters were estimated with 92.5 % accuracy according to the R2 performance evaluation criterion. In the second stage, each layer’s infill percentage and layer thickness of the compression sample were analyzed using image processing techniques. In the final stage of the study, using the Python programming language, a user-specific visual interface is designed for showing the results and graphics related to the material processing step in FDM 3D printing.