ERDOĞAN KANCA - Academia.edu (original) (raw)

Papers by ERDOĞAN KANCA

The present study focuses on the applicability of friction stir welding to pure Pb plates. The jo... more The present study focuses on the applicability of friction stir welding to pure Pb plates. The joint performances are evaluated by optical microscopy, microhardness measurements, notch impact tests and three point bending tests. The effects of the tool rotational speed (1500, 2000 and 2500 rev/min) and welding speed (72, 100 and 125 mm/min) on the joint performance are determined. The results indicate that the welded joints exhibit similar or higher mechanical properties than those of the base material. Optimal joint performance was achieved with a rotational speed of 1500 rev/min and welding speed of 100 mm/min.

Karadeniz Fen Bilimleri Dergisi

Due to the high mechanical strength of the metals used in implant manufacture, which makes them d... more Due to the high mechanical strength of the metals used in implant manufacture, which makes them difficult to work with using other machining techniques, electrical discharge machining (EDM) is frequently employed in the production of implants. In this study, the effect of powder ratio and other EDM parameters used in the machining of CoCrMo alloy, which used in implant production widely, with powder-mixed EDM on the surface roughness of the machined part was investigated through the response surface methodology. AISI 316L stainless steel was chosen as the electrode material, and Ti6V4Al was chosen as the additive powder, taking into account their biocompatibility properties. Using a Taguchi L16 array, an experimental design was created by selecting 4 levels for each parameter of additive ratio, discharge current, pulse on time (Ton), and pulse off time (Toff). The response surface method was used, along with the experimental data, to estimate how the parameters affected the arithmet...

Journal of Manufacturing Science and Engineering

Although it is an old technique, research on the hot rolling process maintains its importance bec... more Although it is an old technique, research on the hot rolling process maintains its importance because of its widespread usage in steel production and its requirement for a vast amount of resources, especially energy. The roll pass design of the hot rolling process considerably affects many operational parameters such as energy requirement, roll wear, working forces, and torques. Furthermore, due to the sequential nature of the rolling process, a design of any number of passes is closely interrelated with all other passes in the process. This complexity makes it challenging to find optimal design solutions that strike a balance between conflicting goals and constraints. In this article, a new optimized solution search strategy based on a desirability function is offered to address the sequential characteristics of the roll pass design. A novel optimization method utilizing response surfaces and the proposed solution search strategy is presented to reduce the shaping energy of the ove...

ASREL

Elektrodepolama yöntemi, metal, alaşım veya kompozit kaplamaların elde edilmesinde önemli bir tek... more Elektrodepolama yöntemi, metal, alaşım veya kompozit kaplamaların elde edilmesinde önemli bir tekniktir.Elektrodepolamayöntemi ile elde edilen Ni-Cr alaşımlı kaplamalar özellikle korozif ortamlarda tercih edilmektedir. Bu çalışma,elektrodepolamayöntemi ile Ni-Cr alaşım kaplama elde edilmesi ve deneysel tasarım yöntemlerinden biri olan Taguchi yöntemi kullanılarak optimizasyon parametrelerinin belirlenmesi ile ilgilidir.Elektrodepolamayönteminde parametre fazlalığı nedeniyle deneysel parametreleri belirlemek için bu yöntem tercih edilmiştir. Bu amaçla Taguchi L9 ortogonal dizisi seçilmiştir. Parametre olarak; pH, sıcaklık, akım yoğunluğu ve karıştırma hızının üç farklı seviyesi kullanılmıştır. Korozif ortamlarda Ni-Cr kaplamalar tercih edildiğinden, kaplamayı etkileyen faktörlerin tafel ekstrapolasyon yöntemi ile elde edilen korozyon sonuçlarına etkisi sinyal-gürültü oranı, ortalama etkiler ve varyans analizi ile incelenmiştir. Tafel ekstrapolasyon yöntemi kullanılarak elde edilen eğ...

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi

In this study, holes were drilled on the Sleipner cold work tool steel with a hardness of 60-62 H... more In this study, holes were drilled on the Sleipner cold work tool steel with a hardness of 60-62 HRC by copper and brass electrodes using three different current values (50, 25, 12.5 A), pulse on times (3, 6, 9 μs) and pulse off times (4, 6, 8 μs) parameters in the EDM method; the effects of these working parameters on machining times, material removal rate (MRR), electrode wear rate (EWR), the hole inlet-outlet diameters of the machined parts, the kerf on workpiece and electrode were analyzed. As a result of the analyzes made, in the use of copper electrodes, the MRR increased by 311.25% on average compared to the use of brass electrodes, while the EWR and machining time decreased by 42.01% and 38.46%, respectively. The increase in sparking and thermal effects between the workpiece and the electrode resulted in an increase in the MRR and a decrease in the machining time. In the use of copper and brass electrodes with different processing parameters, the inlet diameters of the drille...

$Research paper thumbnail of Wire electric discharge machining and its effect on the surface finish of HfNbTaTiZr refractory high-entropy alloy$

The International Journal of Advanced Manufacturing Technology

Journal of Materials and Mechatronics: A

Wire electric discharge machining (WEDM) is widely used in dies, punches, aerospace and automotiv... more Wire electric discharge machining (WEDM) is widely used in dies, punches, aerospace and automotive sectors, since materials with high hardness, and temperature resistant, which are not possible to be cut with conventional machining methods, can be cut with high precision using the WEDM method. In this study, cutting speed (mm/min), material removal rate (mm3/min), wire consume (g), machining time (sec), finish measure (mm) and surface roughness (µm) changes as a result of cutting high hardness cold work tool steel using copper and brass wire in WEDM method were investigated. In addition, worn wire and workpiece residues on the machined surfaces were detected by SEM (Scanning Electron Microscope) and EDX (Energy Dispersive X-Ray) analyzes as well as topography and composition were examined. In the case of using copper wire instead of the brass wire, wire consumption and processing time decreased by 23.30 % and 66.29 %, respectively, while MRR increased by 50 % because the copper wire...

Journal of Materials Engineering and Performance

Surface and Coatings Technology

Materials Characterization

Materials Science and Technology, 2011

ABSTRACT In the present work, the wear of cutting tools in the machining of 7075Al alloy composit... more ABSTRACT In the present work, the wear of cutting tools in the machining of 7075Al alloy composites reinforced with 10 and 25 wt-% and 16 mm average size Al2O3 particles was investigated. Machining tests were performed on both as cast and heat treated composites by turning process using a physical vapour deposition coated carbide tool CP500 at different cutting conditions. A new model was developed to predict the tool life by genetic expression programming. The training and validation data sets were obtained from the well established machining test results. The weight fraction of particle P-w, cutting speed V, feedrate f and heat treatment Ht were used as independent input variables, while tool life T was used as a dependent output variable. Different models for tool life were predicted on the basis of the training data set using genetic programming, and the accuracy of the best model was proved with validation data set. The test results showed that the genetic expression programming model has produced correlation coefficient R values of similar to 0.958 for the training data and 0.952 for the validation data. The predicted tool life results were compared with experimental results and found to be in good agreement with the experimentally observed ones.

The International Journal of Advanced Manufacturing Technology, 2011

Surface roughness is a valuable metric when assessing abrasive waterjet machining (AWJM) cut qual... more Surface roughness is a valuable metric when assessing abrasive waterjet machining (AWJM) cut quality. This paper presents 2D and 3D models capable of predicting the surface roughness during abrasive waterjet (AWJ) trimming of composite substrates. The composites used were a carbon-fiber laminate with an epoxy resin and a random oriented carbon-fiber/vinyl ester. The models were based on an earlier rigid-plastic erosive particle indentation model capable of predicting crater sizes using the particle impact and substrate properties. In the 2D model, single particle impact craters were aligned to form multi-particle impact profiles that were iteratively superimposed until a steady-state surface roughness was achieved. The 3D model generated conical craters that were individually superimposed until a steady-state surface roughness was achieved. The models were capable of predicting the surface roughness with an average error of 10% and 16%, for the 2D and 3D models, respectively. The models show that the surface roughness decreased with an increase in particle velocity, a decrease in kerf taper, and an increase in the dynamic hardness of the target.

Engineering Science and Technology, an International Journal, 2020

Iron and steel a-Fe 2 O 3 Red iron oxide pigment Dry grinding Jet mill a b s t r a c t After some... more Iron and steel a-Fe 2 O 3 Red iron oxide pigment Dry grinding Jet mill a b s t r a c t After some other processes, a-Fe 2 O 3 red powder particles-by-product of regeneration of spent pickling liquor in ARP in iron and steel industry-should be ground up to pigment grade to convert it to a value added product, red iron oxide pigment. In this study, grinding tests on a-Fe 2 O 3 red powder were performed using four different types of laboratory-scale mills, namely the vibrating cup mill, vertical ball mill, planetary ball mill, and fluidized bed jet mill. The particle structure of the a-Fe 2 O 3 was investigated by SEM, while its chemical composition was determined by ICP-OES, density, LOI, humidity, Cl content etc. were determined by laboratory tests. Particle size distribution and surface area value of each ground sample was determined using the laser diffraction method. Targeted particle size distribution ranges could only be achieved with the jet mill. Other mills encountered caking and adhesion problem with a-Fe 2 O 3. It was assessed that the adhesion to the inner walls of the grinding chamber and the caking effect were both caused by the humidity content of the material. The grinding yield of the material was found to increase with increased jet mill grinding air pressure (0.8, 3.2 and 7 bars).

JOURNAL OF CHARACTERIZATION

$Research paper thumbnail of WEDM machining of MoNbTaTiZr refractory high entropy alloy$

CIRP Journal of Manufacturing Science and Technology

Fisheries Research, 2003

Stocking can be a cost effective method of enhancing salmonid populations, in particular where th... more Stocking can be a cost effective method of enhancing salmonid populations, in particular where the aim is to restore populations or mitigate against developments. There are risks associated with any intervention and it is suggested that all stockings undergo risk ...

Protection of Metals and Physical Chemistry of Surfaces, 2019

AISI D2 steel is the most commonly used cold-work tool steel in its grade. In this study, microst... more AISI D2 steel is the most commonly used cold-work tool steel in its grade. In this study, microstructural characterization and some mechanical properties of borided AISI D2 steel samples were investigated. The boriding treatment was carried out at 900 and 1000°C for 3, 5 and 7 hours by using Ekabor 2 powder and a solid-state box boriding technique. Wear behavior of borided and non-borided steel were conducted by linear reciprocating wear test using an Al 2 O 3 ball as the counterpart. The sliding distances and the sliding speed were remained constant at 250 m and 5 mm/s, respectively, with the loads of 10, 20 and 30 N (being applied). Microstructural characterization revealed homogeneous, dense and fine-grained structure which had predominant dual phase boride (FeB+Fe 2 B) layer with minor of Cr-B, MoB , V-B, Mn-B interstitial compounds being present as well. The thickness and hardness values of the boride layer were in the range of 46.23-126.8 μm and 2005-2227 HV 0.1 , respectively, depending on the process conditions. The results showed that the wear resistance improved by up to 6.7 times in comparison with non-borided AISI D2 steel. Severe plastic deformation was the effective wear mechanism in non-borided AISI D2 steel. However for the samples which were borided at 900 and 1000°C, delamination and polishing type of wear mechanisms were observed, respectively. Surface hardness and boride layer thickness had a great effect both on wear rate and wear mechanism.

Surface and Coatings Technology, 2017

In the present study, the surface of AISI H13 hot-work tool steel was borided with EKabor II powd... more In the present study, the surface of AISI H13 hot-work tool steel was borided with EKabor II powders using powder pack-boriding method. The process was carried out at 800, 900 and 1000 °C temperatures for 2, 4 and 6 h periods. The wear tests were carried out using a ball-on disc tribometer at room temperature and 500 ºC on borided and untreated AISI H13 hot-work tool steel. Scanning electron microscope (SEM), optical microscope, 3D profilometer, X-Ray diffraction analysis and micro-hardness tester were used in the evaluation of micro-structure and wear data. The increase in the boriding temperature and boriding period led to increased thickness and hardness of the boride layer. Boriding at 800 °C resulted with formation of Fe 2 B, Mn 2 B, Cr 5 B 3, phases, while FeB, Fe 2 B, Mn 2 B, and Cr 5 B 3 boride phases occurred at 900 and 1000 °C. Dominant wear mechanisms were microcrack-induced plastic deformation during high temperature wear tests; oxidation and microcrack formation during room temperature wear tests; and oxidation and severe plastic deformation for the untreated specimen.

Pamukkale University Journal of Engineering Sciences, 2017

Bu çalışmada, nikel bazlı süper alaşımlar içerisinde endüstride yaygın olarak kullanılan Inconel ... more Bu çalışmada, nikel bazlı süper alaşımlar içerisinde endüstride yaygın olarak kullanılan Inconel 625 alaşımı 3 farklı borlama tozu ile borlanmıştır. Kullanılan borlama tozları, %90 elementel nano bor tozu + %10 NaBF4 (NB), %90 nano hegzagonal bor nitrür tozu + %10 NaBF4 (h-NBN) ve mikron boyutundaki ticari EKabor 2 tozlarıdır. Borlama işlemi 1000° C'de 3 sa. süre ile gerçekleştirilmiştir. Borlama işleminin ardından numuneler optik mikroskop, mikrosertlik testi ve XRD analizlerine tabi tutulmuştur. Bu çalışmalarda, farklı kimyasal toz içeriklerinin kaplama tabakası özelikleri ve faz oluşumlarına etkisi incelenmiştir. Yapılan incelemeler neticesinde kimyasal toz bileşenlerine bağlı olarak borür, silisid ve nitrür tabakalar elde edildiği gözlenmiştir. Nano bor tozu ile daha yüksek bor içerikli borür fazlarının elde edilmiş olması borlama tozlarının saflık derecesinin oluşacak fazların türü üzerinde etkili olduğunu göstermiştir. Bu çalışmada, Ni esaslı süper alaşımlarda istenmeyen silisid tabakası oluşumu, borlama tozlarının kimyasal içeriği değiştirilerek engellenmiştir. Ayrıca, hem Niesaslı alaşımlarda kullanılan ticari EKabor-Ni borlama tozuna alternatif olarak nano bor ve nano hegzagonal bor nitrür tozları geliştirilmiş hem de geliştirilen bu tozlarla ticari bor tozlarına göre (Ekabor 2, Ekabor-Ni ve B4C) daha kalın kaplama tabakaları elde edilmiştir. In this study, Inconel 625 Ni-based superalloy, widely used in industrial application, was borided with three different boriding powders. The boriding powders used were as follows: the first one consists of 90% elemental nanoboron and 10% NaBF4, (NB), the second one consisting of 90% nano hexagonal boron nitride and 10% NaBF4 (h-NBN), and the third one being commercial EKabor 2 powder. Boriding is conducted at 1000 °C for 180 minutes. Then the borided samples were investigated with optical microscopy, microhardness test and X-Ray Diffraction (XRD) analysis. In these investigations, the effect of boriding powders with different chemical content on the properties of the coating layer and the phase formation was examined. As a result of these examinations it was observed that boride, silicide and nitride coating layers were obtained depending on the chemical content of boriding powder. The fact that the boron phases with higher boron contents were obtained with nano boron powder indicate that the degree of purity of boron powder has an effect on the type of phases to be formed. In this study, undesirable silicide layer formation encountered in Ni-based super alloys was prevented by changing the chemical composition of boriding powders. Furthermore, nano boron and hexagonal boron nitride powders, have been developed as alternative boron powders to commercial EKabor-Ni boriding powder as well as thicker coating layers have been obtained by using these newly developed boriding powders than commercial boron powders (Ekabor 2, Ekabor-Ni and B4C).