Necati Uçak

Necati Uçak
Ankara Yildirim Beyazit University | AYBU · Department of Mechanical Engineering

PhD Candidate

About

13
Publications
5,989
Reads
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144
Citations
Citations since 2016
13 Research Items
144 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Additional affiliations
February 2014 - present
Yıldırım Beyazıt University
Position
  • Research Assistant

Publications

Publications (13)
Article
In recent years, additive manufacturing (AM) of metallic parts opens new opportunities for many critical industrial sectors and individual necessities. The high quality and more functional components which are difficult or impossible to produce with the conventional methods can be readily manufactured using AM. In addition, minimization of design c...
Article
This part of the study aimed to investigate the effects of cryogenic treatment applied to uncoated high speed steel (HSS) end mills on cutting forces (Fc), surface roughness (Ra), and tool life. The milling tests were performed at four cutting speeds (40, 50, 60, and 70 m/min), three feeds (0.018, 0.024, and 0.03 mm/rev), and a depth of cut (2 mm)...
Article
Full-text available
This paper focused on the performance of tungsten carbide end mills in machining of AISI H13 hot work tool steel under dry and wet conditions. The tool performance was evaluated in terms of resultant cutting force (Fc), average surface roughness (Ra) and tool life. In the milling tests, four categories of end mills were used: untreated (U), cryo-tr...
Article
Full-text available
In engineering applications, to increase productivity and to decrease production costs, the selection of the proper engineering material is essential. At that point, machining operations directly affect the production costs. Therefore, determination of the material with the desired mechanical properties and easy-to-cut characteristics has a critica...
Article
Full-text available
Al2O3 coatings serve as a thermal barrier during a cutting operation and lead to a different chip formation due to changes in heat sharing and friction conditions, thus affect tool life substantially. In this study, the effects of Al2O3 coating on chip formation were investigated in orthogonal cutting of AISI 316L stainless steel. For this purpose,...
Article
This study investigates the performance of a new CryoMQL technique in the hard turning of AISI 52100 bearing steel with the conventional and wiper CBN inserts. It includes simultaneous application of indirect cryogenic cooling (CO2 and LN2) and direct minimum quantity lubrication (MQL) during machining. The CryoMQL conditions (MQL + CO2 and MQL + L...
Article
Full-text available
Son zamanlarda, çevre ve insan sağlığı üzerideki zararlı etkileri nedeniyle, geleneksel kesme sıvılarının kullanımının, sürdürülebilir imalat yöntemleri ile azaltılması veya ortadan kaldırılması amaçlanmaktadır. Bu sebeple, çevre dostu kesme koşullarının talaşlı imalat proseslerine adaptasyonu, günümüzde daha popüler hale gelmektedir. Bunlar arasın...
Article
Full-text available
In material removal processes, determination of optimal machining strategy is a key factor to increase productivity. This situation is gaining more importance when machining components with complex geometry. The current practice in the determination of machining strategy mostly depends on the experience of the machine operator. However, poorly desi...
Article
Full-text available
This study presents finite element simulations of cutting force, torque, and temperature in drilling of Inconel 718 superalloy. The FEM simulations were conducted at a cutting speed of 15 m/min and feed of 0.02 mm/rev using an uncoated solid carbide drill. The predicted cutting forces, torques and cutting temperatures were validated with the experi...
Article
In this study, the drillability of Inconel 718 has been experimentally investigated under dry, wet, and cryogenic conditions. Drilling tests have been performed at a cutting speed of 15 m/min and a feed of 0.02 mm/rev using TiAlN coated and uncoated solid carbide drills. The effects of cooling/lubrication conditions and coating material on drillabi...
Article
Full-text available
In this study, the effects of cryogenic treatment (CT) on the performance of CuCrZr alloy and Cu electrodes in electro discharge machining (EDM) of AISI P20 tool steel were investigated experimentally. For this purpose, a group of electrodes were cryogenically treated at-140 • C for 30 min and then tempered at 175 • C for 1 h. The tool performance...

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