Browsing by Author "Günen, Ali"

Investigation on wear mechanisms of boronized AISI 4140 steel

Bozali, U.; Yaşar, Mustafa; Çetin, Melik; Çay, Vedat Veli; Günen, Ali (Scibulcom Ltd., 2017)

In this study, AISI 4140 steel was subjected to box boronizing treatment at 1123 K, 1173 K and 1223 K for 2h, 4h, and 6h with commercially EKabor 2 powders. Friction and wear behaviour of the boronized and following worn ...

Investigations on machinability of Al2O3 reinforced Al6061 metal matrix composites

Kanca, Erdoğan; Günen, Ali (Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2016)

In this study, six different MMCs containing Al6061 matrix and Al2O3reinforcements with particle sizes of 32 µm and 66 µm and weight fraction of 10%, 15% and 20% were produced using the vortex method. Machinability ...

Jominy testinin sonlu elemanlar yöntemiyle modellenmesi

Yürük, Soner (İskenderun Teknik Üniversitesi / Mühendislik ve Fen Bilimleri Enstitüsü / Makine Mühendisliği Anabilim Dalı, 2018)

Malzemelere uygulanan ısıl işlemlerin modellenebilmesi günümüzde ticari yazılımlarla yapılmaktadır. Bu modellemeleri yapan ticari programlar, iş parçasının ısıl işlem sonrasındaki mekanik özellikleri ve tane yapıları ...

Mechanical Properties and Corrosion Resistance of Borosintered Distaloy Steels

Turgut, Selvin; Günen, Ali (Springer, 2020)

Distaloy SA is a sponge iron powder (nominal composition: Fe-1.75Ni-1.5Cu-0.5Mo) widely used in the production of powder metallurgy (P/M) parts in the automotive industry. In this study, Distaloy SA powders were sintered ...

Micro-abrasion wear behavior of thermal-spray-coated steel tooth drill bits

Günen, Ali (Polish Academy of Sciences, 2016)

Wear behavior of four kinds of thermally sprayed coatings on steel tooth drill bits have been investigated by micro-abrasion wear test. The fixed ball micro abrasion wear test was applied for bare substrate and for thermal ...

Microabrasion Wear Behavior of Fast-Borided Steel Tooth Drill Bits

Günen, Ali; Kanca, Erdoğan; Demir, Mehmet; Er, Yusuf; Sağlam, Gökhan; Gök, Mustafa Sabri (Taylor and Francis Inc., 2017)

In this study, the surface of steel tooth drill bits (Ni-Cr-Mo based) was subjected to the solid-state boriding treatment with 10- to 50-nm nanoboron powder. Boriding processes were carried out at a constant temperature ...

Microstructural and mechanical properties of friction stir welded pure lead

Günen, Ali; Kanca, Erdoğan; Demir, Mehmet; Çavdar, Faruk; Mıstıkoğlu, Selçuk; Çam, Gürel (National Institute of Science Communication and Information Resources (NISCAIR), 2018)

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 ...

Microstructural characterization, boriding kinetics and tribo-wear behavior of borided Fe-based A286 superalloy

Günen, Ali; Keddam, Mourad; Alkan, Sabri; Erdoğan, Azmi; Çetin, Melik (Elsevier, 2022)

Iron-based superalloys are alloys produced for use in corrosive environments as an alternative to high-cost nickel-based superalloys. However, their average strength and hardness, attributed to their austenitic structures, ...

Microstructural, wear and corrosion characteristics of boronized AISI 904L superaustenitic stainless steel

Çetin, Melik; Günen, Ali; Kalkandelen, Müge; Karakaş, Mustafa Serdar (Elsevier, 2021)

AISI 900 series stainless steels are considered as low-cost alternatives to nickel-based superalloys used for highly corrosive environments. However, in terms of mechanical properties, they have average strength and hardness ...

Microstructure and mechanical properties of borided CoCrFeNiAl0.25Ti0.5 high entropy alloy produced by powder metallurgy

Erdoğan, Azmi; Günen, Ali; Gök, Mustafa Sabri; Zeytin, Sakin (Elsevier, 2021)

CoCrFeNiAl0.25Ti0.5 high entropy alloy alloys (HEA), produced by powder metallurgy were subjected to boriding to improve their mechanical properties. Sintering was carried out at 1200 degrees C for 2 h in Ar, and boriding ...

Microstructure and mechanical properties of borided inconel 625 superalloy

Günen, Ali; Kanca, Erdoğan (Universidade Federal do Rio de Janeiro, 2017)

The Ni-based superalloy Inconel 625 is extensively used owing to its high strength, excellent fabricability, good weldability and outstanding resistance to high temperature corrosion against aggressive environments. However, ...

Microstructure, some mechanical properties and tribocorrosion wear behavior of boronized Al0.07Co1.26Cr1.80Fe1.42Mn1.35Ni1.10 high entropy alloy

Karakaş, Mustafa Serdar; Günen, Ali; Çarboğa, Cemal; Karaca, Yusuf; Demir, Mehmet; Altınay, Yasemin; Erdoğan, Azmi (Elsevier, 2021)

High-entropy alloys (HEAs) with face-centered cubic (FCC) structures exhibit high toughness and corrosion resistance, but their average strengths and relatively low wear resistance can limit their engineering ap-plications. ...

A Modeling Study on Surface Roughness of Spinneret Mold Sections Machined By WEDM

Kanca, Erdoğan; Taşkın, Volkan Cem; Günen, Ali (Sakarya University Journal of Science, 2019)

The Wire Electrical Discharge Machining (Wire EDM) is widely used in the cutting of Bulk Continuous Filament (BCF) spinneret molds. Because of the low surface roughness of the spinneret molds obtained by the Wire EDM method, ...

A new approach to sintering and boriding of steels "Boro-sintering": Formation, microstructure and wear behaviors

Erdoğan, Azmi; Kurşuncu, Bilal; Günen, Ali; Kalkandelen, Müge; Gök, Mustafa Sabri (Elsevier, 2020)

In this study, sintering and boriding methods are applied as a single step, and it is aimed to gain time and economic advantage. For this purpose, powder mixtures prepared in suitable compositions were subjected to sintering ...

Pack-Boriding of Monel 400: Microstructural Characterization and Boriding Kinetics

Günen, Ali; Keddam, Mourad; Erdoǧan, Azmi; Karakaş, Mustafa Serdar (Korean Institute of Metals and Materials, 2021)

Monel 400 was pack-borided in the temperature range of 1173-1273 K for exposure times of 2-6 h. The boride layers produced on the surface of the alloy were examined by scanning electron microscopy and phase identification ...

Powder-pack boronizing of CoCrFeNiAl0.5Nb0.5 HEA: Modeling of kinetics, microstructural, mechanical, and tribological characterizations

Günen, Ali; Keddam, Murad; Sünbül, Sefa Emre; İçin, Kürşat; Döleker, Kadir Mert; Gök, Mustafa Sabri; Dal, Serkan; Erdoğan, Azmi (Elsevier, 2022)

This study is dedicated to the detailed investigation of boronization kinetic, microstructural, mechanical, and wear properties of high entropy alloys (HEAs) considering their sluggish diffusion effect properties. A ...

Properties and Corrosion Behavior of Chromium and Vanadium Carbide Composite Coatings Produced on Ductile Cast Iron by Thermoreactive Diffusion Technique

Günen, Ali; Kalkandelen, Müge; Karahan, İsmail Hakkı; Kurt, Bülent; Kanca, Erdoğan; Gök, Mustafa Sabri; Karakaş, Mustafa Serdar (ASME, 2020)

Ductile iron (DI) owes many of its attractive mechanical properties to the graphite nodules in its structure. However, since galvanic coupling can occur between the graphite nodules and the matrix in aggressive environments, ...