Yazar "Dilsiz, Yusuf" seçeneğine göre listele

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    Comprehensive Optimization of Selective Laser Melting Process Parameters for Microstructure, Density, Hardness, and Tribological Performance of Pure Copper
    (Int Inst Science Sintering (I I S S), 2024) Ozkan, Burcu Asli; Dilsiz, Yusuf; Kucukelyas, Burak; Sever, Ahmet; Bademlioglu, Ali Husnu; Kaboglu, Cihan; Uzunsoy, Deniz
    This study is concerned with the optimisation of the processing parameters for the selective laser melting (SLM) of pure copper. The influence of these parameters on the microstructure, density and mechanical properties of copper samples produced by SLM is investigated in detail. Taguchi analysis is used to assess the importance of key building parameters including layer thickness, laser spot size and hatch distance on density. In addition, ANOVA is used to describe the contribution of each parameter to the density. The results reveal that layer thickness is the most effective parameter on density with an impact rate of 88.86%. Contrary to this situation, it appears that the effect of laser spot size and hatch distance on the density is quite limited, with an impact rate of 2.57% and 0.10%, respectively. Optimum results, including a relative density of 95.4% and a hardness of 63 HV, are achieved under specific parameters: a layer thickness of 0.03 mm, a hatch distance of 110 mm and a laser spot size of 70 mu m. This study provides a valuable insight into SLM processing of pure copper and offers practical recommendations for optimising the parameters used.
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    Determination of Production Parameters of CuCrZr Alloy by Selective Laser Melting Process
    (2025) Özkan, Burcu Aslı; Dilsiz, Yusuf; Ozates, Cem; Sevinç, Enes Furkan; Kaykılarlı, Cantekin; Kaboglu, Cihan; Uzunsoy, Deniz
    CuCrZr alloy is a widely preferred material in the space, defense, and electronics industries with its high thermal and electrical conductivity properties. There are limited publications on the investigation of the tribological properties of CuCrZr alloys produced via the selective laser melting (SLM) method. In this study, it was aimed to optimize the process parameters and examine the effect of process parameters on density, hardness, microstructure, and tribological properties of domestically produced CuCrZr powder to be produced by the SLM method, which allows the production of complex structured parts. The optimum process parameters of the CuCrZr alloy were determined as laser power of 435 W, scanning speed of 350 mm/s, layer thickness of 0.02 mm, laser diameter of 0.1 mm, hatch distance of 0.1 mm, and energy density of 621.42 J/mm3. The relative density, hardness, COF, and wear values of the samples produced with the optimized SLM process parameters were obtained as 99% and 96 HV, 0.5520 ±0.1648, and 1.17x 10-4 (mm3/N.m), respectively.