Kaftanoğlu, Bilgin

Profile Picture
Profile URL
https://hdl.handle.net/20.500.14411/6780
Name Variants
Bilgin, Kaftanoğlu
Kaftanoglu, Bilgin
Bilgin Kaftanoğlu
K., Bilgin
Kaftanoğlu,B.
Kaftanoğlu, Bilgin
K.,Bilgin
B.,Kaftanoglu
KAFTANOGLU B.
Kaftanoğlu B.
B.,Kaftanoğlu
Kaftanoglu,B.
Bilgin, Kaftanoglu
Kaftanoglu B.
Kaftanoglu,Bilgin
B., Kaftanoğlu
B., Kaftanoglu
Kaftanoglu, B.
Job Title
Profesör Doktor
Email Address
bilgin.kaftanoglu@atilim.edu.tr
Main Affiliation
Manufacturing Engineering
Status
Website
ORCID ID
0000-0002-2216-7405
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID

Sustainable Development Goals

14

LIFE BELOW WATER
LIFE BELOW WATER Logo

0

Research Products

2

ZERO HUNGER
ZERO HUNGER Logo

0

Research Products

11

SUSTAINABLE CITIES AND COMMUNITIES
SUSTAINABLE CITIES AND COMMUNITIES Logo

1

Research Products

1

NO POVERTY
NO POVERTY Logo

0

Research Products

12

RESPONSIBLE CONSUMPTION AND PRODUCTION
RESPONSIBLE CONSUMPTION AND PRODUCTION Logo

0

Research Products

7

AFFORDABLE AND CLEAN ENERGY
AFFORDABLE AND CLEAN ENERGY Logo

2

Research Products

5

GENDER EQUALITY
GENDER EQUALITY Logo

0

Research Products

3

GOOD HEALTH AND WELL-BEING
GOOD HEALTH AND WELL-BEING Logo

1

Research Products

9

INDUSTRY, INNOVATION AND INFRASTRUCTURE
INDUSTRY, INNOVATION AND INFRASTRUCTURE Logo

4

Research Products

13

CLIMATE ACTION
CLIMATE ACTION Logo

0

Research Products

6

CLEAN WATER AND SANITATION
CLEAN WATER AND SANITATION Logo

0

Research Products

10

REDUCED INEQUALITIES
REDUCED INEQUALITIES Logo

0

Research Products

4

QUALITY EDUCATION
QUALITY EDUCATION Logo

0

Research Products

15

LIFE ON LAND
LIFE ON LAND Logo

0

Research Products

16

PEACE, JUSTICE AND STRONG INSTITUTIONS
PEACE, JUSTICE AND STRONG INSTITUTIONS Logo

0

Research Products

17

PARTNERSHIPS FOR THE GOALS
PARTNERSHIPS FOR THE GOALS Logo

0

Research Products

8

DECENT WORK AND ECONOMIC GROWTH
DECENT WORK AND ECONOMIC GROWTH Logo

0

Research Products
This researcher does not have a Scopus ID.
This researcher does not have a WoS ID.
Scholarly Output

49

Articles

25

Views / Downloads

70/0

Supervised MSc Theses

10

Supervised PhD Theses

5

WoS Citation Count

752

Scopus Citation Count

839

WoS h-index

13

Scopus h-index

13

Patents

0

Projects

0

WoS Citations per Publication

15.35

Scopus Citations per Publication

17.12

Open Access Source

9

Supervised Theses

15

Google Analytics Visitor Traffic

JournalCount
Makina Tasarım ve Imalat Dergisi3
International Journal of Thermodynamics2
CIRP Annals2
Applied Energy2
International Journal of Refrigeration2
Current Page: 1 / 5

Scopus Quartile Distribution

Competency Cloud

GCRIS Competency Cloud

Filters

2010 - 2019342020 - 202515
Reset filters

Settings

Scholarly Output Search Results

Now showing 1 - 10 of 49
  • Thumbnail Image
    Article
    Citation - WoS: 58
    Citation - Scopus: 66
    Experimental Investigation of a Natural Zeolite-Water Adsorption Cooling Unit
    (Elsevier Sci Ltd, 2011) Solmus, Ismail; Kaftanoglu, Bilgin; Yamali, Cemil; Baker, Derek
    In this study, a thermally driven adsorption cooling unit using natural zeolite-water as the adsorbent-refrigerant pair has been built and its performance investigated experimentally at various evaporator temperatures. The primary components of the cooling unit are a shell and tube adsorbent bed, an evaporator, a condenser, heating and cooling baths, measurement instruments and supplementary system components. The adsorbent bed is considered to enhance the bed's heat and mass transfer characteristics; the bed consists of an inner vacuum tube filled with zeolite (zeolite tube) inserted into a larger tubular shell. Under the experimental conditions of 45 degrees C adsorption, 150 degrees C desorption, 30 degrees C condenser and 22.5 degrees C, 15 degrees C and 10 degrees C evaporator temperatures, the COP of the adsorption cooling unit is approximately 0.25 and the maximum average volumetric cooling power density (SCR,) and mass specific cooling power density per kg adsorbent (SCP) of the cooling unit are 5.2 kW/m(3) and 7 W/kg, respectively. (C) 2011 Elsevier Ltd. All rights reserved.
  • Thumbnail Image
    Master Thesis
    Mikroorganizmaların Yapışmasını Önleyici İnorganik ve Organik Akıllı Yüzeylerin Geliştirilmesi ve İncelenmesi
    (2014) Ergene, Cansu; Şengönül, Cemal Merih; Kaftanoğlu, Bilgin
    Özellikle uzun süreli kullanımları sırasında tıbbi cihazların yüzeyinde meydana gelen biyofilm oluşumu, hastane ortamında yakalanılan birçok enfeksiyonun temel nedenidir. Çoğu zaman bu enfeksiyonlar, iyileşme sürecini gecikmeye uğratmakta ve sürekli kendisini tekrarlayabilen komplikasyonlar sonucu maliyeti yüksek müdahalelere sebep olmaktadır. Bakteri yapışmasına dirençli yüzeyler hazırlamak, biyofilm oluşumuyla mücadelede etkili bir yaklaşım olabilir. Bu tez çalışmasıyla, mikroorganizmaların yüzeye yapışmasını engelleyici inorganik ve organik akıllı yüzeyler geliştirilmesi hedeflenmiştir. İlk olarak, AISI 316L çelikleri üzerinde kubik ve hekzagonal benzeri kristalografik yapılarda bulunan bor nitrür (BN) kaplamaların bakteriyostatik davranışı incelenmiştir. Bu çalışmada, atomların kristalografik düzenlerinin bakteri yapışmasına etkisi ortaya konmuştur. Organik yüzey çalışmasında ise, katyonik peptit, Laktoferisin B (LFB)'nin kimyasal olarak bağlanmasıyla modifiye edilmiş silikon kauçuğu yüzeylerin antibakteriyel aktiviteleri değerlendirilmiştir. Bu çalışma sonucunda, peptitlerin yüzeye başarılı bir şekilde bağlandıkları ve kataterlerde genellikle biyofilm oluşumuna yol açan S. epidermidis ve P. aeruginosa gibi bakterilere karşı öldürücü etkileri gözlemlenmiştir.
  • Thumbnail Image
    Conference Object
    A Study on the Constitutive Equation Effects in the Fracture Initiation of Aa5450 Sheets
    (Pleiades journals, 2019) Dizaji,S.A.; Darendeliler,H.; Kaftanoğlu,B.
    Determination of the fracture initiation in the sheet metal forming applications can be achieved successfully using ductile fracture criteria (DFCs) and finite element codes together. In this study three different uncoupled, energy based ductile fracture criteria have been employed to predict the onset of the fracture in the AA5450 aluminum alloy sheets. Also, two different constitutive models namely, isotropic von-Mises and anisotropic Hill, have been implemented to the finite element code ABAQUS through VUMAT subroutine to investigate the effect of constitutive equations on the applicability of the utilized DFCs. It was shown that the constitutive model has significant influence on the estimation of the time and place of the fracture initiation in the sheets. © Springer Nature Singapore Pte Ltd. 2019.
  • Thumbnail Image
    Conference Object
    Antibacterial Activity of Cubic Boron Nitride (cbn) Coatings on Stainless Steel Grade 316 (316l)
    (Amer Chemical Soc, 2010) Uzunoglu, Emel; Sengonul, Merih; Derici, Kursat; Biriken, Derya; Kaftanoglu, Bilgin; Sengonul, Merih
    [No Abstract Available]
  • Thumbnail Image
    Article
    Citation - WoS: 13
    Citation - Scopus: 13
    Analysis of Non-Isothermal Warm Deep Drawing of Dual-Phase Dp600 Steel
    (Springer France, 2019) Pepelnjak, T.; Kayhan, E.; Kaftanoglu, B.
    Improving the formability of the material is a key issue in the deep drawing process. Heating the material above its recrystallization temperature drastically increases formability, but in the case of dual phase (DP) steels, it results in a loss of their mechanical properties. To improve the drawing ratio, only the heating of the flange region in the warm temperature range up to 573K was studied on DP600 sheet steel by numerical simulation. A thermo-elastic-plastic finite element method (FEM) analysis of deep drawing at several drawing ratios was performed and compared with experimental results. During the experiments, the flange area of the blank was heated by induction heating, and the central part over the punch was cooled with spray water. Experimental results showed that limiting drawing ratio could be increased by 25.58%. The microstructure of the DP 600 steel was analyzed before and after the warm forming process. No significant changes were observed, and the high strength properties of the DP 600 steel remained intact. There was good agreement between numerical and experimental results.
  • Thumbnail Image
    Article
    Citation - WoS: 2
    Performance of Boron Nitride Coated Tools and Dies
    (Univ Maribor, Fac Mechanical Engineering, 2013) Kaftanoglu, B.; Dokmetas, N.
    Boron nitride (BN) has been utilized as a significant coating material for cutting tool applications due to its excellent mechanical and chemical properties. Cutting tools, molds and machine parts are coated with BN with the coating system using a sputtering technology - a physical vapour deposition (PVD) process. Design and manufacture of the equipment is made locally. Physical, mechanical and tribological properties such as thickness, friction coefficient, wear, and adhesion are measured by using calotest, tribometer, profilometer, micro and macro scratch test, and nanohardness devices. The results of characterization of the coatings show that wear resistance and hardness increase and BN coatings provide increased efficiency by creating a value-added manufacturing. In this case, the use of BN-coated tools in machining is expected to be one of the best solutions. (C) 2013 PEI, University of Maribor. All rights reserved.
  • Thumbnail Image
    Article
    Citation - WoS: 5
    Measurement of Solar Radiation in Ankara, Turkey
    (Turkish Soc thermal Sciences Technology, 2013) Caglar, Ahmet; Yamali, Cemil; Baker, Derek K.; Kaftanoglu, Bilgin
    The solar energy potential of Ankara, Turkey, (39.89 degrees N, 32.78 degrees E) has been investigated using the measurements of global and beam radiation over the period May 2008 to May 2009. Surface air temperature was also measured and variation in clearness index evaluated over this period. Global and beam radiations have been analyzed using hourly, daily and monthly averages obtained from 1-minute averages of recorded data. Results show that annual average daily global and beam radiations were 17.04 and 15.72 MJ/m(2)/day, respectively, for this period. The results are compared with the data available for several other cities in Turkey. The study shows that Ankara has a large solar potential. The consistency of these data with that from the State Meteorological Service (SMS) weather station in Ankara was analyzed. Significant differences between these 2 stations were found and are attributed to measurement error at the SMS station. New radiation-measurement stations should be established to create a better national radiation database for Turkey.
  • Thumbnail Image
    Doctoral Thesis
    Derin Çekme Sınır Oranın, Flanş Bölgesinin Isıtılarak Artırılması için Yöntem Geliştirilmesi
    (2015) Kayhan, Erdem; Kaftanoğlu, Bilgin; Kayhan, Erdem; Kaftanoğlu, Bilgin; Kayhan, Erdem; Kaftanoğlu, Bilgin; Konca, Erkan; Manufacturing Engineering; Airframe and Powerplant Maintenance; Manufacturing Engineering; Airframe and Powerplant Maintenance
    Bu tez çalışmasında geliştirilen yöntem kısaca, sac metal malzemelerin şekillendirilme oranının flanş bölgesinin eş sıcaklık dağılımsız ısıtılarak artırılması olarak açıklanabilir. Sıcaklık artışı malzemenin sünekliğinde belirgin bir yükselmeye ve buna bağlı olarak şekillendirilme kapasitesinin artmasına neden olur. Sıcaklık artışı ayrıca malzemenin akma sınırının düşmesi ile birlikte, uygulama kuvvetlerinde ve basınçlarında azalma meydana gelir. Otomotiv endüstrisinde en yaygın kullanıma sahip olan Yüksek Mukavemet Sac Çelik (AHSS) malzeme DP600 olup, araç ağırlıklarının azalmasını ve çarpışma emniyet faktörünün artmasını sağlamasından dolayı bu tez çalışmasında araştırma malzemesi olarak seçilmiştir. Adı geçen çelik malzemelerin kullanımı malzeme kalınlıklarının ve yakıt sarfiyatının azalmasını sağlar. Yapılan araştırmada geliştirilen yöntemin geçerliliği üç farklı tip malzeme, bunlardan iki tanesi Düşük Alaşımlı Yüksek Mukavemet çeliği (HSLA), diğeri ise IF (Arayersiz Çelikler) çeliği kullanılarak, incelenmiştir. Flanş bölgesinin sıcaklığının 180oC to 300oC değerleri arasında oluşturulduğu deneylerde derin çekme sınır oranında %25.58 kadar artış sağlanmıştır. Kullanılan sıcaklık ılık işlem sıcaklığı seviyesinde olduğundan, şekillendirilme kuvvetlerinde azalma meydana gelmesine rağmen malzemenin özelliklerinde ve dayanımında bir değişim gerçekleşmemektedir.
  • Thumbnail Image
    Article
    Citation - WoS: 39
    Citation - Scopus: 49
    Focus Variation Measurement and Prediction of Surface Texture Parameters Using Machine Learning in Laser Powder Bed Fusion
    (Asme, 2020) Ozel, Tugrul; Altay, Ayca; Kaftanoglu, Bilgin; Leach, Richard; Senin, Nicola; Donmez, Alkan
    The powder bed fusion-based additive manufacturing process uses a laser to melt and fuse powder metal material together and creates parts with intricate surface topography that are often influenced by laser path, layer-to-layer scanning strategies, and energy density. Surface topography investigations of as-built, nickel alloy (625) surfaces were performed by obtaining areal height maps using focus variation microscopy for samples produced at various energy density settings and two different scan strategies. Surface areal height maps and measured surface texture parameters revealed the highly irregular nature of surface topography created by laser powder bed fusion (LPBF). Effects of process parameters and energy density on the areal surface texture have been identified. Machine learning methods were applied to measured data to establish input and output relationships between process parameters and measured surface texture parameters with predictive capabilities. The advantages of utilizing such predictive models for process planning purposes are highlighted.
  • Thumbnail Image
    Article
    Citation - WoS: 113
    Citation - Scopus: 147
    Experiments and Finite Element Simulations on Micro-Milling of Ti-6al Alloy With Uncoated and Cbn Coated Micro-Tools
    (Elsevier, 2011) Oezel, T.; Thepsonthi, T.; Ulutan, D.; Kaftanoglu, B.
    This paper presents experimental investigations and finite element simulations on micro-milling of Ti-6Al-4V alloy with fine grain uncoated and cBN coated micro-end mills. Micro-milling of Ti-6Al-4V using uncoated and cBN coated tungsten carbide micro-end mills are conducted; surface roughness, burr formation and tool wear are measured. Effects of machining parameters on surface roughness, burr formation, and tool wear for uncoated and cBN coated micro-tools are investigated. Finite element modelling is utilized to predict forces, temperatures, and wear rate for uncoated and cBN coated micro-tools. Predicted temperature and tool wear contours for uncoated and cBN coated micro-tool edges reveal advantages of cBN coatings. Optimization studies on the experimental results are also conducted to identify the optimum process parameters which minimize both surface roughness and burr formation concurrently. (C) 2011 CIRP.