Browsing by Author "Özkul, İskender"
Now showing items 1-16 of 16
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ANN surface roughness prediction of AZ91D magnesium alloys in the turning process
Buldum, Berat Baris; Sık, Aydın; Akdağlı, Ali; Biçer, Mustafa Berkan; Aldaş, Mersin Kemal; Özkul, İskender (Carl Hanser Verlag, 2017)This contribution presents an approach for the modeling and prediction of surface roughness in the turning of AZ91D magnesium alloys using an artificial neural network. The experiments were conducted with CCGT, DCGT and ... -
Cu bazlı şekil hafızalı metallerin üretimindeki alaşım miktarlarının faz dönüşüm sıcaklıklarına etkisi ve karakterizasyonu
Özkul, İskender (Aksaray Üniversitesi Fen Bilimleri Enstitüsü, 2016)Üretimi zor ve oldukça yüksek maliyetli NiTi esaslı şekil hafızalı alaşımlara alternatif olan bakır bazlı şekil hafızalı alaşımlar gün geçtikçe daha da çok ilerleme kaydetmektedir. Bakır bazlı şekil hafızalı alaşımlar genel ... -
Determination of the transformation temperatures of aged and low manganese rated Cu-Al-Mn shape memory alloys
Aldaş, Kemal; Özkul, İskender (Scibulcom Ltd., 2016)This study reports the investigation of transformation temperatures of aged Cu- Al-Mn shape memory alloys with low-rated Mn (< 5 wt.% Mn). A total of 21 different Cu-Al-Mn based chemical compositions were fabricated using ... -
The effect of the aging period on the martensitic transformation and kinetic characteristic of at % Cu(68.09)Al(26.1)Ni(1.54)Den(4.27) shape memory alloy
Özkul, İskender; Canbay, C. Aksu; Aladağ, Faruk; Aldaş, Kemal (Allerton Press Inc, 2017)In this work, the effect of aging period on the characteristic transformation temperatures, thermodynamic parameters and structural variations of CuAlNiMn shape memory alloys were investigated. Aging was performed at above ... -
Effects of machining parameters and reinforcement content on thrust force during drilling of hybrid composites
Aldaş, Kemal; Özkul, İskender; Hayajneh, Mohammed T. (Carl Hanser Verlag, 2016)In this study, aluminum metal matrix composites were fabricated using the powder metallurgy technique with different ratios of alumina (Al2O3) and graphite as reinforcing elements. The obtained workpieces were then drilled ... -
Experimental investigation of convective heat transfer on a flat plate subjected to a transversely synthetic jet
Akdağ, Ünal; Çetin, Özden; Demiral, Doğan; Özkul, İskender (Pergamon-Elsevier Science Ltd, 2013)In this study, the effect of a synthetic jet on the heat transfer of flow over a flat plate is investigated experimentally. The experimental study is consist of a heater made of copper plate having constant heat flux located ... -
Investigation of Fe content in Cu-Al-Ni shape memory alloys
Canbay, Canan Aksu; Ünlü, Necip; Özkul, İskender; Polat, T.; Şekerci, Memet; Aldaş, Kemal (Springer, 2018)Polycrystalline Cu-Al-Ni-Fe-based shape memory alloys with different chemical composition were produced in an arc-melting furnace under an argon atmosphere. Homogenized and aged specimens were prepared for multiple analyses. ... -
Investigation of the effects of aging on phase transformation of Cu-Al-Mn shape memory alloys
Özkul, İskender; Aldaş, Kemal; Canbay, Canan Aksu (Scibulcom Ltd., 2015)In this study, the aging effects were investigated on four different Cu-Al-Mn alloys. During the experiments, three different temperature values and three different time intervals were selected and experiments were conducted ... -
Mathematical modeling of diameter and circularity deviation in wire electrical discharge machining of a hot work tool steel
Eşme, Uğur; Külekçi, Mustafa Kemal; Akkurt, Adnan; Şeker, Ulvi; Özkul, İskender (Carl Hanser Verlag, 2013)The suitable selection of manufacturing process and conditions are very important in manufacturing processes to obtain good surface quality and dimensional precision. Thus, it is required to know properties relating to ... -
Modelling surface roughness in WEDM process using ANFIS method
Aldaş, Kemal; Özkul, İskender; Akkurt, Adnan (Scibulcom Ltd., 2014)In this study, adaptive neuro-fuzzy inference system (ANFIS) modelling was used for estimation surface roughness based on experimental study of after processing with wire electrical discharge machining (WEDM) in Dievar hot ... -
Multiple regression modeling and prediction of the surface roughness in the WEDM process
Wire electrical discharge machining (WEDM) process is a specialized thermal machining process capable of accurately cutting and machining mechanical parts with various hardnesses and intricate shapes. WEDM is also a ... -
Optical and electrical characterization of the metal oxide composites by hydrothermal method
Aksu Canbay, Canan; Hamad, Rekawt Khdir; Özkul, İskender (Aksaray Üniversitesi, 2019)Metal oxide and metallic composites are commonly used in material science. Oxides can perform different physical features by small shift during synthesis. That commonly tends innovative results. In this study copper ... -
Prediction of A(f) temperature for copper based shape memory alloys
Aldaş, Kemal; Özkul, İskender; Eskil, Murat (National Institute of Science Communication and Information Resources (NISCAIR), 2014)This study presents the gene expression programming (GEP) soft computing technique as a new tool for the formulation of the Austenite finish (Af) temperature of Cu-based shape memory alloys (SMA) for various compositions ... -
Prediction of thermodynamic equilibrium temperature of Cu-based shape-memory smart materials
Eskil, Murat; Aldaş, Kemal; Özkul, İskender (Springer, 2015)The thermodynamic equilibrium temperature (T (0)) is an important factor in the austenite and martensitic phases. In this study, the effects of alloying elements and heat treatments on T (0) temperature were investigated ... -
Shape memory alloys phenomena: classification of the shape memory alloys production techniques and application fields
Özkul, İskender; Kurgun, Mehmet Ali; Kalay, Ece; Aksu Canbay, Canan; Aldaş, Kemal (Springer, 2019)The shape memory alloy, referred to as the material of the future, is the first to come to mind in the class of smart materials. Shape memory alloys are already present in many important areas. In the medical field, glasses ... -
Sıcak iş takım çeliklerinden dıevar takım çeliğinin tel erozyon ile işlenebilirliğinin araştırılması
Özkul, İskender; Şeker, Ulvi; Buldum, Berat Barış; Akkurt, Adnan (Teknolojik Araştırmalar, 2012)Bu çalışmada tel erozyon tezgâhı kullanarak, sıcak iş takım çeliği üzerinde, farklı makine parametreleri ile delik formu işlemesi yapılmıştır. Kesme işleminde vurum süresi (puls on time), tabla ilerlemesi ve tezgâh ana ...
