Yazar "Guleryuz L.F." seçeneğine göre listele

Listeleniyor 1 - 5 / 5
  • Küçük Resim Yok
    Öğe
    Effect of Ca additions on the mechanical properties of Mg and in vitro degradation behavior of Mg-xCa alloys produced by powder metallurgy
    (European Powder Metallurgy Association (EPMA), 2016) Guleryuz L.F.; Ipek R.; Aritman I.
    Currently some biomaterials, especially mg and mg alloys and related manufacturing methods are among important research topics due to their suitable biocompatibility, mechanical and corrosion properties. In this study, the effects of the addition of different amounts (1, 3, and 5 wt %) of Ca were added to the base material has been processed by Mechanical Alloying method. Hot sintering was conducted at 550 oC under vacuum argon atmosphere. Resulting microstructures and compression test behaviors of the Mg-based alloys were studied. Biodegradability of Mg-x Ca alloys were tested in vitro with SBF (simulated body fluid) solution. Visual inspection using SEM (Scanning Electron Microscope) analyses indicates that the microstructure of the composite is also greatly affected by these parameters. In addition, EDS (Energy Dispersive X-Ray Spectroscopy) performed for reliable determination of the chemical composition.
  • Küçük Resim Yok
    Öğe
    The influence of process parameters of EDM on the surface roughness of aluminum matrix composites reinforced with sic particulates
    (2013) Guleryuz L.F.; Ozan S.; Kasman S.; Ipek R.
    This paper investigates the effect of electrical discharge machining parameters on the surface roughness as an alternative method for machining of Al/SiCp metal matrix composites produced with the powder metallurgy. Current, electrode type, pulse-on-time, particle reinforcement weight ratio and voltage were used as the process parameters. An experimental plan (L18) was constituted by using the Taguchi orthogonal design. Results of experiments showed that pulse-on-time (34%) and current (31.26%) is the most influencing parameters. Besides this, the percentage contribution of particle reinforcement on the surface roughness is 6.71%.
  • Küçük Resim Yok
    Öğe
    An investigation of WEDM process parameters on the surface roughness of Al/B4Cp metal matrix composites
    (2012) Ozan S.; Guleryuz L.F.; Kasman Ş.; Ipek R.
    The purpose of this study is to define the effects of wire electrical discharge machining (WEDM) process parameters on surface roughness for Al/B 4Cp metal matrix composites (MMCs) having different amounts of reinforcement particle (3, 6, and 12 wt.%). Totally nine experiments were performed according to the experimental design method conducted by Taguchi L9 orthogonal array on Al/B4Cp MMC samples to determine the effect of WEDM process parameters on the surface roughness. The particle reinforcement amount (wt.%) is the most dominant factor (60.69%) on the surface roughness and it is followed by pulse on time (36.28%) and wire feed (1.49%), respectively. The surface roughness value taken from confirmation experiments and predicted value is 5.26µm, 5.37µm respectively. © 2012 American Institute of Physics.
  • Küçük Resim Yok
    Öğe
    Microstructure and mechanical properties of Zn-Mg alloys as implant materials manufactured by powder metallurgy method
    (American Institute of Physics Inc., 2017) Guleryuz L.F.; Ipek R.; Arltman I.; Karaoglu S.
    Currently some biomaterials, especially Zn and Mg alloys and related manufacturing methods are among important research topics due to their suitable biocompatibility, mechanical and corrosion properties. Zn Mg alloy has been processed by Mechanical Alloying method. Hot sintering was conducted at 410°C under argon atmosphere. Resulting microstructures densities and hardness test behaviors of the Zn-based alloys were studied.Visual inspection using SEM (Scanning Electron Microscope) analyses indicates that the microstructure of the composite is also greatly effected by these parameters. In addition, EDS (Energy Dispersive X-Ray Spectroscopy analyses were performed for reliable determination of the chemical composition. © 2017 Author(s).
  • Küçük Resim Yok
    Öğe
    Synthesis and characterization of Gd2O2SO4:Pr3+ scintillation material produced by Sol-Gel process for digital imaging system
    (Polish Academy of Sciences, 2017) Aritman I.; Yildirim S.; Kisa A.; Guleryuz L.F.; Yurddaskal M.; Dikici T.; Celik E.
    Scintillation materials are widely used in digital X-ray imaging applications, radiotherapy applications coupled with suitable photoreceptors. Gd2O2SO4 (GOS) scintillator doped with trivalent praseodymium (Pr3+) presented high X-ray absorption properties and good spectral compatibility which were utilized extensively for imaging system of X-ray microscopy, soft X-ray phosphor screen for water window. In this study, GOS:0.01Pr3+ scintillation material was synthesized by unique sol-gel process which was not previously applied and its characterization properties were investigated. Structure and luminescence properties of GOS:Pr3+ were optimized by utilizing X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and luminescence spectroscopy.