Yazar "Aydin, Murat" seçeneğine göre listele

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    Correction: Effects of Short-Time Austenitization on Mechanical Properties and Transformation-Induced Plasticity in Alloyed Austempered Ductile Iron (International Journal of Metalcasting, (2022), 16, 4, (1836-1848), 10.1007/s40962-021-00723-3)
    (Springer Science and Business Media Deutschland GmbH, 2023) Nalcaci, Burak; Sahin, Omer; Okur, Onur; Aydin, Murat; Erdogan, Mehmet
    The original online version of this article was revised. The graphical abstract, Fig. 8, Table 4, and miscellaneous values throughout the text were corrected. © 2023, American Foundry Society.
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    Effects of Short-Time Austenitization on Mechanical Properties and Transformation-Induced Plasticity in Alloyed Austempered Ductile Iron
    (Springer Science and Business Media Deutschland GmbH, 2022) Nalcaci, Burak; Sahin, Omer; Okur, Onur; Aydin, Murat; Erdogan, Mehmet
    The present study was performed to investigate the influences of short-time austenitization on mechanical properties and transformation-induced plasticity (TRIP) in austempered ductile iron. For this purpose, Cu–Ni–Mo-alloyed ductile iron (DI) were poured into sand molds and subsequently the DI samples were austenitized at 850 °C for the duration of 15–30–60 min followed by holding in a salt bath at an austempering temperature of 260 °C for 90 min. Characterization studies were carried out with dilatometer, image analyses software, tensile test, hardness test, XRD analysis, optical and scanning electron microscopies. Findings revealed that as the austenitization time increased, carbon content of austenite (total of high carbon and blocky) and bainitic ferrite cell size enhanced, and phase volume fractions of transformation products of austenite changed. Within this context, changes in the mechanical properties were discussed. Optimum combination of strength and ductility and maximum TRIP effect were determined in the shortest (15 min)-austenitized sample. Accordingly, it was determined 15 min austenitization led to progression in the mechanical properties as 146 MPa and 2.8 % increment in the tensile strength and total elongation respectively, compared to 45 min austenitized sample. Graphical Abstract: [Figure not available: see fulltext.] © 2021, American Foundry Society.
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    EFFECTS OF SHORT-TIME AUSTENITIZATION ON MECHANICAL PROPERTIES AND TRANSFORMATION-INDUCED PLASTICITY IN ALLOYED AUSTEMPERED DUCTILE IRON
    (Springer Int Publ Ag, 2022) Nalcaci, Burak; Sahin, Omer; Erdogan, Mehmet; Okur, Onur; Aydin, Murat
    The present study was performed to investigate the influences of short-time austenitization on mechanical properties and transformation-induced plasticity (TRIP) in austempered ductile iron. For this purpose, Cu-Ni-Moalloyed ductile iron (DI) were poured into sand molds and subsequently the DI samples were austenitized at 850 degrees C for the duration of 15-30-60 min followed by holding in a salt bath at an austempering temperature of 260 degrees C for 90 min. Characterization studies were carried out with dilatometer, image analyses software, tensile test, hardness test, XRD analysis, optical and scanning electron microscopies. Findings revealed that as the austenitization time increased, carbon content of austenite (total of high carbon and blocky) and bainitic ferrite cell size enhanced, and phase volume fractions of transformation products of austenite changed. Within this context, changes in the mechanical properties were discussed. Optimum combination of strength and ductility and maximum TRIP effect were determined in the shortest (15 min)-austenitized sample. Accordingly, it was determined 15 min austenitization led to progression in the mechanical properties as 146 MPa and 2.8 % increment in the tensile strength and total elongation respectively, compared to 45 min austenitized sample. [GRAPHICS] .
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    EFFECTS OF SHORT-TIME AUSTENITIZATION ON MECHANICAL PROPERTIES AND TRANSFORMATION-INDUCED PLASTICITY IN ALLOYED AUSTEMPERED DUCTILE IRON (vol 16, pg 1836, 2021)
    (Springer Int Publ Ag, 2023) Nalcaci, Burak; Sahin, Omer; Erdogan, Mehmet; Okur, Onur; Aydin, Murat
    [Abstract No tAvailable]
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    INFLUENCES OF OAK UTILIZATION ON THE MEDIUM DENSITY FIBERBOARD PROPERTIES
    (Univ Bio-Bio, 2024) Camlibel, Osman; Aydin, Murat; Koc, Enues
    Softwoods are the basic and traditional raw materials for medium -density fiberboard production. However, sustainable consumption of wood material in the production of wood -based products requires material variety. Therefore, the usability of hardwood species in the production and its effects on the board properties should be of interest. Considering this, the influence of oak utilization percentages (30 %, 50 %, 70 %, and 100 %) on the physical (density, thickness swelling -TS 2 and 24 h) and mechanical (modulus of rupture, modulus of elasticity, internal bonding, screw holding resistance, and Janka hardness) properties of medium density fiberboard was evaluated in this study. Boards were factory -made instead of laboratory -made using Quercus petraea (oak), Fagus orientalis (beech), and Pinus sylvester (Scots pine) fibers. According to the results, the modulus of rupture, modulus of elasticity, and Janka hardness values were increased when medium -density fiberboard was produced using only oak fiber. On the contrary, thickness swelling, screwholding resistance, and internal bonding properties were decreased.
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    Static magnetic field induced epigenetic changes in wheat callus
    (Wiley, 2016) Aydin, Murat; Taspinar, Mahmut Sinan; Cakmak, Zeynep Elibol; Dumlupinar, Rahmi; Agar, Guleray
    Deoxyribonucleic acid (DNA) is always damaged by endogenous and exogenous factors. Magnetic field (MF) is one of these exogenous factors. When repair mechanisms are not sufficient, mainly because of imbalance in damage or mistakes in repair mechanisms, methylation of DNA results in polymorphism-related abnormalities. In this study, low intensity static magnetic field-induced DNA damage and methylation in wheat calli were investigated by using Random Amplified Polymorphic DNA and Coupled Restriction Enzyme Digestion-Random Amplification techniques. Calli were derived from mature embryos of wheat. Both 7- and 14-day-old wheat calli were exposed to 7mT (millitesla) static MF for 24, 48, 72, 96, or 120h of incubation period. The highest change in polymorphism rate was obtained in calli exposed to 7mT MF for 120h in both 7- and 14-day-old calli. Increase in MF duration caused DNA hypermethylation in both 7- and 14-day-old calli. Polymorphism and DNA methylation ratio were higher in 7-day-old calli. The highest methylation level with a value of 25.1% was found in 7-day-old calli exposed to MF for 120h. Results suggested that low intensity static magnetic field may trigger genomic instability and DNA methylation. Bioelectromagnetics. 37:504-511, 2016. (c) 2016 Wiley Periodicals, Inc.
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    The Effects of Continuous Press Speed and Conditioning Time on the Particleboard Properties at Industrial Scale
    (North Carolina State Univ Dept Wood & Paper Sci, 2022) Camlibel, Osman; Aydin, Murat
    Effects of continuous press speed (580 and 600 mm/s) and conditioning time (0 and 72 h) on some physical and mechanical properties and formaldehyde content of particleboards were investigated. The 18 mm thick boards were manufactured using urea-formaldehyde, with a 50% pine, 40% oak wood, and 10% poplar biomass mixture of the wood materials. According to the results of the unconditioned samples, the density, modulus of rupture (MOR), moisture content (MC), thickness swelling (TS), and water absorption (WA) were increased 0.8%, 4.4%, 0.4%, 4.4%, and 5.5% when press speed increased from 580 to 600 mm/s, while thickness, modulus of elasticity (MOE), internal bond (IB), surface soundness (SS), and free formaldehyde (FF) were decreased 0.3%, 4.9%, 2.4%, 10.6%, and 21.1%, respectively. On the contrary to the results of unconditioned samples, MOE and SS were increased 1% and 1.4%, respectively, and WA was decreased 3.5% with the increase in press speed when samples were conditioned for 72 h. Free formaldehyde content was the most prominent parameter influenced by the increase in press speed both for the unconditioned and 72 h conditioned samples.