Profile URL: https://hdl.handle.net/20.500.13091/11581
Job Title:Prof. Dr.
Email Address:mbagci@ktun.edu.tr
Main Affiliation:02.10. Department of Mechanical Engineering
Status: Current Staff
ORCID:
0000-0001-6934-8660
0000-0001-6934-8660Scopus ID:
26434127300
26434127300YÖK Akademik: 6A82A1D3026E0EB3
Google Scholar:
NElCsewAAAAJ
NElCsewAAAAJWeb of Science ID:
ABI-4797-2020
ABI-4797-2020Name Variants:
Bagci, Mehmet
48 results
Scholarly Output Search Results
Now showing 1 - 10 of 48
Article Experimental Investigation of the Effect of Alternative Sandblasting Processes on the Surface Roughness Data of Smooth Rolls(2023) Kıvrım, Abdullah Zekai; Bozkurt, Muhammet; Bağcı, Mehmet<p><em>The process of sandblasting is a method applied to remove oil, dirt, rust, and corrosion from metal surfaces, aiming to extend the metal's service life due to the gradual development of rust and corrosion over time. This procedure involves using various abrasive substances, specially manufactured under the name "grit." Sandblasting, similar to sandpaper, not only eliminates visible or micron-sized rust and corrosion on the metal surface but also aims to achieve a specific level of surface roughness. An essential criterion in this process is to texture the surface with appropriate abrasives.</em></p> <p><em>The sandblasting machine used in this study is designed to achieve the desired average surface roughness level, denoted by the R a value, on the smooth rolls in flour mill rolls and flaking rolls. The machine features a sand recycling system, a filtered vacuum suction line, and employs a blower system to provide a dust-free environment. The majority of the abrasive material sprayed by the nozzle is conveyed to the rear sand tank through vacuuming, allowing dust and abrasive material to accumulate in a closed tank without extensively mixing with the air. </em></p> <p><em> </em></p> <p><em>Consequently, the operator can achieve abrasive material recovery through the blower method without being adversely affected by the sandblasting process. </em></p> <p><em>The abrasive particles with a brown aluminium oxide property and a size of 24 mesh aim to create a homogeneous roughness on the surface of smooth rolls using a PLC system. In this study, the rotation of the roll bearings at a constant speed around their axis and the comparison of different surface roughness values with the variable linear velocity h of the nozzle positioned at different angles to this movement are investigated.</em></p>Article Effect of Operating Environment on Volumetric Efficiency and Characteristic Parameters of Heavy Vehicle Piston Compressors(2026) Özmen, Talha; Aydın, Mehmet Esat; Torun, Y; Bağcı, MehmetPneumatically operated hand tools, factories and especially in the automotive sector, compressed air is widely preferred as a drive mechanism or a necessity. Pressurized air has a critical role in the operation of the brake mechanism in vehicles such as trucks, lorries and buses. The compressed air supply inside vehicle is commonly provided by reciprocating compressors. Depending on the working conditions and environment of the compressor in the vehicle, the efficiency level decreases according to the negativities it encounters. In this study, the volumetric efficiencies of two companies producing reciprocating compressors in two different sectors were compared by considering various parameters. Compressors were operated for a total of 3 hours at 3 different pressure values and a repeated experimental study was performed considering 6 different speed values during the study. One flow sensor was used to determine the volumetric efficiency and the results of the flow meter were evaluated by adjusting the sensor settings according to international standards and laboratory conditions. As a result of the experimental studies, the effect of compressor operating characteristics on compressor performance and volumetric efficiency was investigated. It was also determined how changing the sensor settings differentiated the results. At the end of the study, the points where the reverse engineered compressor differs from the original product were identified.Master Thesis Nozul geometrisinin aşındırıcı partikül çarpma hızına etkisinin erozyon aşınma deneyleri ile belirlenmesi(2024) Duvarcı, Bekir; Bağcı, MehmetErosion wear, caused by the impact of high-speed abrasive particles on surfaces, is a significant wear mechanism with numerous applications across various sectors, limiting equipment life in many industrial settings. While the various parameters affecting this wear mechanism have been studied in detail, studies experimentally investigating the effect of nozzle geometry on particle impact velocity and related erosion behavior remain limited. This thesis focuses on updating a solid particle erosion wear testing device to investigate the effect of nozzle geometry on abrasive particle impact velocity and erosion wear. Design and manufacturing processes prioritizing increased experimental consistency were implemented. Therefore, the development of a transition process to an erosion testing device with three-axis movement capability, equipped with electronic monitoring and control infrastructure, and compliant with international standards is of critical importance. Furthermore, the designed system aims to enable reliable and repeatable analysis of erosion wear outputs based on variations between nozzle geometry and particle velocity. In this study, nozzles with different outlet diameters (Ø3.2 mm, Ø4.8 mm, Ø6.4 mm, and Ø8.5 mm) were manufactured, and aluminum oxide (Al₂O₃) particles with a size range of 300–425 µm were chosen as abrasives. Air was planned to be used as the fluid for particle transport. In the investigation of particle movement, the measurement infrastructure was developed through the thesis activities by integrating the double-disk method into the experimental setup to determine abrasive velocities depending on flow rate variations. In the experiments, microstructure comparisons were made using S355J2+N structural steel material, defined in the EN 10025-2 standard, primarily for the transportation sector.Article Lazer İşleme Parametreleri Açısından Taşlama Silindirlerinin Yüzey Pürüzlülüğü ve Sertlik Çıktılarının Öneminin Belirlenmesi(SAVVY, 2025-10-25) Kıvrım, Abdullah Zekai; Şahin, Ömer Sinan; Ergun, Betül; Bağcı, MehmetSurface roughness and hardness, critically important in industrial applications, are parameters that affect the performance and functionality of cast iron materials, particularly in various sectors. White cast iron is widely used in food milling due to its superior hardness and wear resistance. In parallel with all these advantages, grinding cylinders made of white cast iron wear to a certain extent due to the grinding of products such as wheat, barley, and coffee beans, necessitating periodic surface treatment. Laser processing has become widely used in recent years to modify the surface properties of metallic and composite materials. This experimentally significant study focused on investigating the effects of laser processing parameters on the surface roughness and hardness of grinding cylinders made of white cast iron. It was concluded that by using 10, 30 and 50 W, the desired hardness and roughness can be achieved by correctly selecting the process parameters. At the end of theexperimental process, depending on the effect of power parameter variability, microscopic images showed a smooth surface texture, regional molten surface fluctuations and microcrater results in the presence of irregular solidification in the upper layer.Other Solid Particle Erosion Behaviors of Walnut Shell-Filled (Acrylic-Styrene-Acrylate) [ASA] and (Polycarbonate/Acrylic-Styrene-Acrylate) [PC/ASA] Thermoplastic Blend Biocomposites(2024) Karagöz, İdris; Sepetçioğlu, Harun; Demet, Seyit Mehmet; Bağcı, MehmetArticle Investigation of Erosion Wear Behavior and Incubation Period of 3D-Printed ABS, PLA and Nylon-CF(Emerald Group Publishing Ltd, 2025-12-11) Aydin, Mehmet Esat; Ozturk, Osman; Bagci, MehmetPurposeThis study aims to investigate the erosion wear behavior of three-dimensional (3D)-printed Acrylonitrile Butadiene Styrene (ABS), Polylactic acid (PLA) and Nylon-CF (Nylon Carbon Fiber) parts with jet impingement test using alumina (Al2O3) particles. The effects of build orientation and impingement angle on erosion wear behavior were investigated.Design/methodology/approachABS, PLA and Nylon test specimens with build orientations of 0 degrees, 45 degrees and 90 degrees were fabricated using a 3D printer. Erosion wear tests were conducted on these specimens at impingement angles of 30 degrees, 60 degrees and 90 degrees. The erosion wear rate was determined by measuring the weight loss. EDX analysis and SEM images were obtained to find the wear characteristics.FindingsThe build orientation affected the wear resistance of ABS slightly, whereas the orientation caused more significant differences in PLA and Nylon-CF. On the other hand, 90 degrees-oriented Nylon-CF composite gained mass, unlike other materials. From this point on, the incubation period specific to the composites was investigated by gradually increasing the amount of abrasive. The abrasive mass up to 5,000 g eventually finalized the incubation period and stabilized the weight loss of Nylon-CF. EDX results and SEM images were interpreted together, proving that the mass gain in Nylon-CF was due to the embedding of alumina particles in the matrix.Originality/valueThis study contributed to the literature to better understand the erosion wear behavior of the most used polymer-based materials produced with 3D printing. The incubation period detected in the Nylon-CF sample, which was found to be due to particle embedding, added another originality.Article Erosive Wear Behavior of FRP Composite Pipes Under Varying Impingement Angles, Impact Velocities and Flow Directions(Elsevier Sci Ltd, 2026-02-01) Demet, Seyit Mehmet; Kepir, Yusuf; Gunoz, Alper; Sepetcioglu, Harun; Bagci, Mehmet; Kara, MemduhFiber-reinforced polymer (FRP) composite pipes are emerging as superior alternatives in sectors such as oil and gas, chemical processing, and aerospace, owing to their high strength-to-weight ratio, corrosion resistance, and design flexibility; however, their long-term durability is susceptible to erosion wear when exposed to abrasive particles. This study experimentally investigates the solid particle erosion (SPE) behavior of filament-wound carbon (CFR/EP), glass (GFR/EP), and basalt (BFR/EP) fiber-reinforced epoxy pipes by ASTM G76-18. Tests were conducted under varied impingement angles (30 degrees, 45 degrees, 60 degrees, 90 degrees), flow directions (axial and radial), and particle velocities (28 and 34 m/s), using both erosion rate (ER) and volumetric material loss to assess performance. All composites demonstrated a semi-ductile erosion response, with degradation consistently peaking at a 45 degrees impingement angle across all test conditions. An increase in particle velocity from 28 to 34 m/s induced a near two-fold escalation in ER. Among the materials, BFR/EP exhibited the highest erosion rates, whereas CFR/ EP was the most resistant. Notably, ER values were consistently higher in the axial flow direction, exceeding radial values by 20-40 % under the most severe condition (45 degrees at 34 m/s). Paradoxically, despite its lower ER, CFR/EP suffered greater volumetric material loss than GFR/EP, a discrepancy attributed to its significantly lower fiber volume fraction (42.4 %) compared to GFR/EP (68.9 %) and BFR/EP (59.7 %). These findings emphasize that both ER and volumetric loss are critical metrics for designing thin-walled pipes, thereby providing a crucial scientific basis for material selection in environments characterized by erosive, multi-directional flow.Article Citation - WoS: 32Citation - Scopus: 33A General Review on the Thiospinels and Their Energy Applications(ELSEVIER SCI LTD, 2021-09-01) Özel, F.; Kılıç, H. S.; Coşkun, H.; Deveci, I.; Sarılmaz, A.; Balıkçıoğlu, A.; Ersöz, M.; Kuş, MahmutMaterial science is one of the decisive tools toward engineering versatile compounds for numerous technological applications. Over the last decades, thiospinels have been attracting great interest because of their unique characteristics and potential utilizations offering innovative and interesting features. The characteristics of these transition metal sulfides play a key role in many different applications and make thiospinels an essential class of material. To the best of our knowledge, this work, for the first time, summarizes broadband studies on thiospinels reported in the literature. The scope of this review covers all synthesis methods applied over, the chemical and physical properties, and the clean energy applications of thiospinels, which have achieved tremendous significance. It underlined and proposed the challenges and future perspectives based on sulfur-based ternary compounds. Moreover, this review draws attention to the current and future research needs of thiospinel materials to improve and broaden their applications and thus commercialization. (C) 2021 Elsevier Ltd. All rights reserved.Article Repository Copy of: Hydrostatic And Hydrodynamic Bearing On Grinding Machine(2024) Kandemir, Sani; Talih, Galip; Bağcı, MehmetThis record is a repository-preserved copy of an article originally published in The European Journal of Research and Development by Orclever Science & Research Group. It is archived here on Zenodo for long-term preservation and discoverability; it is not the version of record, and Zenodo is not the publisher of this work. Version of Record (primary publication): https://doi.org/10.56038/ejrnd.v4i4.542 Publisher: Orclever Science & Research Group. Journal: The European Journal of Research and Development. For citation, please use the Crossref DOI and the journal citation above — not the Zenodo DOI.Article Citation - WoS: 3Citation - Scopus: 5Erosion Resistance of Cfrp Composite Materials With Different Fiber Weaves Exposed To Cryogenic Treatment(TAYLOR & FRANCIS INC, 2020-10-14) Demirci, Musa; Bağcı, MehmetCarbon fiber-reinforced polymers (CFRPs) are often exposed to solid particle erosion wear due to small particles moving freely in the atmosphere or in the environment and their impact on aircraft bodies. In this study, fiber weaves of CFRP composite materials of the following types were produced: unidirectional (U), plain weave multidirectional (P), and twill 2 x 2 weave multidirectional (T). Tests that involved three different CFRP composite materials were conducted at room temperature with two groups (pure and exposed to cryogenic liquid nitrogen treatment), at two different fiber directions (0 degrees and 45 degrees), and at four different impingement angles (30 degrees, 45 degrees, 60 degrees, and 90 degrees). Subsequently, erosion wear rate values were calculated and erosion rate-impingement angle graphs were produced for each fiber direction to study the effect of the different environments. Scanning electron microscopy images of surface deformation were compared between the different experimental conditions.
Research Topics
Domains
Physical Sciences
Fields
Environmental ScienceEngineering
Subfields
Ecological ModelingOcean EngineeringAerospace EngineeringCivil and Structural EngineeringMechanical Engineering
Specific Research Areas
Erosion and Abrasive Machining
Particle Dynamics in Fluid Flows
High-Temperature Coating Behaviors
Tunneling and Rock Mechanics
Advanced machining processes and optimization
Sustainable Development Goals
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
10
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
3
Research Products
7AFFORDABLE AND CLEAN ENERGY
2
Research Products
10REDUCED INEQUALITIES
1
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
1
Research Products
17PARTNERSHIPS FOR THE GOALS
1
Research Products
6CLEAN WATER AND SANITATION
1
Research Products
Documents
33
Citations
563
h-index
10
Documents
27
Citations
477
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 31 |
| Selçuk University | 20 |
| KTO Karatay University | 12 |
| Istanbul Commerce University | 3 |
| Sakarya University | 2 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| Research Square | 2 |
| Mühendis ve Makina | 2 |
| Polymer Composites | 2 |
| Orclever Proceedings of Research and Development | 2 |
| Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji | 1 |
Current Page: 1 / 7
Scholarly Output
48
Articles
31
Views / Downloads
93/386
Supervised MSc Theses
9
Supervised PhD Theses
1
WoS Citation Count
113
Scopus Citation Count
127
Patents
0
Projects
0
WoS Citations per Publication
2.35
Scopus Citations per Publication
2.65
Open Access Source
25
Supervised Theses
10
Scopus Quartile Distribution
Competency Cloud
