Browsing by Author "Usta, Yusuf"

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Citation Count: Gülcan, Orhan;...et.al. (2016). "EDM Performance of B4C Cu Based Sintered Tool Electrodes", Journal of Material Science and Technology, Vol.24, No.1, pp.3-10.
EDM Performance of B4C Cu Based Sintered Tool Electrodes
(2016) Gülcan, Orhan; Uslan, İbrahim; Usta, Yusuf; Çoğun, Can; 3837
Citation Count: Gülcan, O...et al. (2015). Effect of use of cu-cr p/m electrodes on machining performance of electric discharge machining. Journal of the Faculty of Engineering and Architecture of Gazi University, 30(3), 381-394.
Effect of use of cu-cr p/m electrodes on machining performance of electric discharge machining
(Gazi University, Fac Engineering Architecture, 2015) Gülcan, Orhan; Uslan, İbrahim; Usta, Yusuf; Çoğun, Can; 3113; 118190; 3837
In this study, the effect of use of Cu-Cr powder metal (P/M) electrodes on EDM performance outputs, namely material removal rate (MRR), electrode wear rate (EWR), mean and maximum roughness of machined surface (R-a and R-z) and workpiece surface recast layer thickness, was investigated experimentally. The Cu-Cr P/M electrodes produced at different mixing ratios, compacting pressures and sintering temperatures were used to machine SAE 1040 steel. The analyses performed have shown that the electrode material is deposited on to the work surface as a layer and the powder mixing ratio, the compaction pressure and sintering temperature affect the EDM performance outputs
Citation Count: Gülcan, Orhan...et al. "Electro discharge machining performance of chromium copper powder metal electrodes", 7th. International Powder Metallurgy ConferenceAt: Ankara, 2014.
Electro discharge machining performance of chromium copper powder metal electrodes
(2014) Gülcan, Orhan; Uslan, İbrahim; Usta, Yusuf; Çoğun, Can; 3837
In electro discharge machining used frequently in tool production, copper and graphite is commonly used as electrode material. The reason of this is high melting temperatures and excellent electrical and thermal conductivity of these materials. But, the low wear resistance of these materials makes it necessary to investigate different materials that have more wear resistance. Up to now, apart from copper, materials like brass, chromium, tungsten, steel, titanium have been used in electrode production. Apart from different materials, different production techniques have been investigated to increase production time. Powder metallurgy is one of these techniques. Electrode production with powder metallurgy becomes more advantageous than other production techniques due to the possibility of different powder combinations and controlling of thermal, electrical, mechanical and micro structure properties of produced electrodes with pressing pressure and sintering temperature. In the present study, chromium-copper composite electrodes produced with powder metallurgy will be used for electro discharge machining of SAE 1040 steel and material removal rate, electrode wear rate and surface roughness values will be compared with values from machining with electrolytic copper.
Citation Count: Gülcan, Orhan;...et.al. (2015). "Elektro Erozyon İle İşlemede Cu-Cr T/M Elektrot Kullanımının İşleme Performansına Etkisi", Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Vol.30, No.3, pp.381-394.
Elektro Erozyon İle İşlemede Cu-Cr T/M Elektrot Kullanımının İşleme Performansına Etkisi
(2015) Gülcan, Orhan; Uslan, İbrahim; Usta, Yusuf; Çoğun, Can; 3837
Bu çalışmada, Cu-Cr toz metal (T/M) elektrot kullanımının elektro erozyon ile işleme (EEİ) performans çıktılarından işparçası işleme hızı (İİH), elektrot aşınma hızı (EAH), işlenmiş yüzeyin ortalama ve azami yüzey pürüzlülükleri (Ra ve Rz) ve işparçası yüzey katman kalınlıklarına etkileri deneysel olarak incelenmiştir. Farklı toz karıştırma oranları, sıkıştırma basınçları ve sinterleme sıcaklıklarında elde edilen Cu-Cr T/M elektrotlar SAE 1040 çeliğinin işlenmesinde kullanılmıştır. Analizler, elektrot malzemesinin işparçası yüzeyinde katman halinde alaşımlandığını ve karıştırma oranı, sıkıştırma basıncı ve sinterleme sıcaklığının EEİ performans çıktılarını etkilediğini göstermiştir.