Sürdürülebilir Kalkınma Amaçları

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• MakaleYalnız künye2025Scopus SJRQ1/r/munzur/1127
  Bridging experiment and simulation: Image processing-driven FEA of carbon fiber powder reinforced LDPE

  ARIKAN, Volkan; DOGAN, Akar

  Short fiber-reinforced polymers are widely used in engineering applications due to their improved mechanical performance and processability. However, accurately predicting the elastic behavior of such composites remains a challenge, especially when fibers are randomly distributed and lack defined orientation. To address this, this study investigates the mechanical properties of composite materials developed by incorporating carbon fiber powder (CFP) into a low-density polyethylene (LDPE) matrix at different reinforcement ratios (3 %, 6 %, and 9 %). The effects of CFP content on elastic modulus, tensile strength, and ductility were examined experimentally and through finite element analysis (FEA). Scanning electron microscopy (SEM) was used to analyze the microstructure, and image processing techniques were applied to quantify fiber orientation, which was then integrated into the FEA framework (Oriented FEA). Results indicate that CFP addition increases stiffness and tensile strength while reducing ductility, with 3 % CFP specimens showing the most favorable balance of mechanical properties. The proposed image-based orientation modeling approach provides improved simulation fidelity and offers a scalable methodology for evaluating the mechanical behavior of short fiber-reinforced composites.

  AtıfScopus2·WoS2·OpenAlex2

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• DüzeltmeYayıncıda açık erişim2025Scopus SJRQ1/r/munzur/1008
  Corrigendum to “A short review of structural, mechanical and magnetic properties of high and medium entropy alloys added rare earth elements” [Mater. Today Commun. 47 (2025) 113264] (Materials Today Communications (2025) 47, (S2352492825017763), (10.1016/j.mtcomm.2025.113264))

  Yayla, Nihal; Güler, Ömer

  The authors regret that in the published version of the article, although the explanations for Figs. 13–16 (Also, Figure numbers and explanations given just below the figures) are correct in the text, the figure numbers in text are mixed up. The incorrect figure title and its correction are as follows: On page 9, throughout the text: - All sentences starting with Fig. 14 (Wrong) has been corrected to Fig. 13.- All sentences starting with Fig. 15 (Wrong) has been corrected to Fig. 14.- All sentences starting with Fig. 16 (Wrong) has been corrected to Fig. 15.On page 10, throughout the text: - All sentences starting with Fig. 13 (Wrong) has been corrected to Fig. 16.The authors would like to apologise for any inconvenience caused.

  AtıfScopus1

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• Derleme MakaleYalnız künye2025Scopus SJRQ1/r/munzur/841
  A short review of structural, mechanical and magnetic properties of high and medium entropy alloys added rare earth elements

  Yayla, Nihal; Güler, Ömer

  This study presents a comprehensive review of the structural, mechanical and magnetic properties of high and medium entropy alloys (HEA and MEA) with rare earth elements (REE) additions. The addition of REE has been shown to have significant effects on phase transformations, microstructural arrangements and thermodynamic stability. Studies in the literature show that REE addition improves properties such as hardness, strength, deformation resistance and magnetic performance. In particular, changes such as transitions from FCC to HCP, formation of intermetallic phases and grain refinement have been observed in phase types with the addition of elements such as Gd, Y and Nd. REE added HEAs offer great potential for modern engineering and advanced technology applications with their superior magnetic moments, magnetocaloric effects and thermal stability. However, there is limited information in the literature on REE added HEAs. This review aims to provide a comprehensive framework for the development of REE added HEAs and to serve as an important reference point for future research.

  AtıfScopus7·WoS7·OpenAlex6

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• MakaleAçık Erişim2022Scopus SJRQ2/r/munzur/2975
  Effects of silver/selenium/chitosan doped hydroxyapatite coatings on REX-734 alloy: Morphology, antibacterial activity, and cell viability

  Aksakal, B.; Say, Y.; Sinirlioglu, Z.A.

  The goal of this study was to improve the antibacterial activity and cell viability of the Rex-734 alloy in biomedical applications. Various biocomposite coatings, such as single-layer hydroxyapatite (HAp), HAp/silver(Ag), and HAp/selenium(Se)/chitosan(Chit), were applied to Rex-734 alloy at various film thicknesses. The surface coatings were characterized by scanning electron microscopy, SEM, EDX, XRD and coating thickness and hardness of surface coatings were measured. The in vitro antibacterial activities of the coated and uncoated substrates were tested against Esherichia coli JM 103 and Staphylococcus aureus ATCC29293. In vitro cell–material interactions using Saos-2 osteoblast cells were characterized by the 3-(4,5-dimethylthiazol2-yl)− 2,5-diphenyltetrazolium bromide (MTT) assay for cell viability. The post-coating sintering parameters were shown to have a significant effect on the surface morphology. When compared to single HAp and HAp/Ag coatings, Se and Chit additions to HAp powders revealed good crack-free coating surfaces. Crack-free coating morphologies were achieved with a sintering speed of 3 °C/min. While single-HA coatings had an antimicrobial efficiency of 83% against E. coli, this value increased to 94% with Ag additive and to 85% with Se additive. Similarly, Ag and Se additives improved HAp's antimicrobial efficiency against Staphylococcus aureus. Cell viability decreased in the HAp/Ag coating at 86.5% and 90.93%, but increased significantly (p < 0.05) in the HA/Se-Chit coating at 137,43% and 158.23% at the end of the first and seventh days of incubation, respectively. The addition of Ag/Se/Chit to HAp increased the viability of the Rex-734 cells. Furthermore, it was revealed that the HAp-doped Se/Chit duplex biocomposite coating groups increased bone cell viability at much higher rates than the single-layer HAp coatings.

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  AtıfScopus12·WoS8·OpenAlex8

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• MakaleYalnız künye2022Scopus SJRQ2/r/munzur/2832
  Microstructure and corrosion investigation of FeCoCrNiMo0,5(MnAl)0,3 high entropy alloy produced by 316 L stainless steel scrap

  Cihangir, Salih; Say, Yakup; Ozkul, İskender; Guler, Omer; Guler, Seval Hale

  FeCrCoNiMo0,5(MnAl)0.3 high-entropy alloy (HEA) was manufactured via arc melting process by adding the related metal powders into scrap of 316 L stainless steel for corrosion resistance tests under salt and acid conditions. Cyclic potentiodynamic polarization experiments performed under acidic conditions revealed pre-passivation due to abundance of network modifying metals in HEA composition which was further analyzed by electrochemical impedance spectroscopy. Elemental resolved analysis of leftover solutions was used to compare metal ions released during corrosion. X-ray diffraction analysis indicated the phase change in heat treated HEA samples. Non-heat treated HEA samples can be compared with stainless steel under moderate corrosion conditions and had better hardness results.

  AtıfScopus20·WoS17·OpenAlex19

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