Yazar "Külekçi, Mustafa Kemal" seçeneğine göre listele

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    Öğe
    An Investigation of Effect of High Temperature Environmental to Fatigue Life of Cutting Steels
    (Çukurova Üniversitesi, 2018) Özgün, Rahim; Köse, Ercan; Külekçi, Mustafa Kemal; Eşme, Uğur; Öcalır, Şeref
    In this study, effects of high temperature environmental to fatigue life have been investigated in cutting steels. For this purpose, fatigue testing machine of micro controller was designed for cylindrical material. The samples which were produced from cutting steels had been kept in high temperature (900 ºC) for 3 hours. Effects of high temperature to fatigue life have been investigated by exposing the samples kept and non-kept in high temperature to fatigue test for different tensiles in designed and produced machine. As result of experiments, it has been observed that the high temperature environment has reduced fatigue resistance in cutting steels. Besides, it was determined that pore intensity of samples kept in high temperature environment increased when the photographs taken from scanning electron microscope (SEM) were investigated.
  • [ X ]
    Öğe
    Optimization of the Effect of Processing Parameters on Surface Roughness and Cutting Energy in CNC Milling of Al-7075 Material
    (2020) Pınarbaşı, Ali Talip; Külekçi, Mustafa Kemal; Esme, Ugur; Boğa, Cem
    In this study, it is intended to determine the most suitable process parameters for surface roughness and cutting energy of the 7075 series aluminum material in dry environment conditions by using Taguchi method in CNC milling. The process parameters were determined as, cutting speed, feed rate and cutting depth and the effects of these parameters on surface roughness, current flow through the grid and the energy consumed were examined. As a result, optimum process parameters were determined and the results were analyzed by graphs. It was observed that the most effective parameter on the surface roughness was the feed rate, while the most effective parameter on the current drawn from the network was the cutting depth. As a result of the experiments, the best surface roughness value was found to be 0.39 μm and the lowest current value was 0.9 A. In addition, considering the determined current amount and processing time, the lowest energy amount consumed was calculated as 7089.28 J.