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Emin Çadırlı - One of the best experts on this subject based on the ideXlab platform.
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Microstructural Evolution and Mechanical Properties in Directionally Solidified Sn–10.2 Sb Peritectic Alloy at a Constant Temperature Gradient
Materials Research, 2016Co-Authors: Elif Yılmaz, Emin Çadırlı, Emine Acer, Mehmet GündüzAbstract:The Sn–10.2 Sb (mass fraction) peritectic alloy was prepared using a vacuum melting furnace and a hot filling furnace. The samples were directionally solidified upwards at steady state conditions with a Constant Temperature Gradient (G=4.5±0.2 K. mm-1) under different growth velocities (V=13.3–266.7 µm. s-1) in a Bridgman-type directional solidification apparatus. The effects of the growth velocity (V) on the dendritic spacings were investigated. Primary dendrite arm spacing (PDAS) of α phase in directionally solidified Sn–10.2 Sb peritectic alloy was measured on the longitudinal and transverse sections of 4 mm diameter cylindrical samples. Secondary dendrite arm spacing (SDAS) was measured on the longitudinal section. The experimental results show that the measured PDAS (λ1L, λ1T) and SDAS (λ2) decrease with increasing growth velocity. The dependence of PDAS, SDAS, microhardness (HV) and compressive strength (σc) on the growth velocity were determined by using a linear regression analysis. The experimental results were compared with the previous experimental results and the results of the experimental models.
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microstructural evolution and mechanical properties in directionally solidified sn 10 2 sb peritectic alloy at a Constant Temperature Gradient
Materials Research-ibero-american Journal of Materials, 2016Co-Authors: Elif Yılmaz, Emin Çadırlı, Emine Acer, Mehmet GündüzAbstract:The Sn–10.2 Sb (mass fraction) peritectic alloy was prepared using a vacuum melting furnace and a hot filling furnace. The samples were directionally solidified upwards at steady state conditions with a Constant Temperature Gradient (G=4.5±0.2 K. mm-1) under different growth velocities (V=13.3–266.7 µm. s-1) in a Bridgman-type directional solidification apparatus. The effects of the growth velocity (V) on the dendritic spacings were investigated. Primary dendrite arm spacing (PDAS) of α phase in directionally solidified Sn–10.2 Sb peritectic alloy was measured on the longitudinal and transverse sections of 4 mm diameter cylindrical samples. Secondary dendrite arm spacing (SDAS) was measured on the longitudinal section. The experimental results show that the measured PDAS (λ1L, λ1T) and SDAS (λ2) decrease with increasing growth velocity. The dependence of PDAS, SDAS, microhardness (HV) and compressive strength (σc) on the growth velocity were determined by using a linear regression analysis. The experimental results were compared with the previous experimental results and the results of the experimental models.
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Investigation of the Some Physical Properties of the Directionally Solidified Al–Cu–Co Ternary Eutectic Alloy
Transactions of The Indian Institute of Metals, 2015Co-Authors: Emin Çadırlı, Izzettin Yilmazer, Mevlüt Şahin, Hasan KayaAbstract:The Al–23.9% Cu–1.2% Co (wt%) ternary eutectic alloy was prepared using a vacuum melting furnace and a casting furnace. The samples were directionally solidified upwards at a Constant growth velocity (18.8 μm/s) under different Temperature Gradients (1.23–5.66 K/mm) and at a Constant Temperature Gradient (5.66 K/mm) under different growth velocities (8.3–166 μm/s) in a Bridgman-type directional solidification furnace. The dependence of the eutectic spacing on the solidification parameters (Temperature Gradient and growth rate) and that of the microhardness and compressive strength on the eutectic spacing and solidification parameters were investigated. The electrical resistivity measurements of the studied alloy were performed and the Temperature coefficient of the resistivity was calculated from the curve of the resulting ρ–Τ plot. The thermal conductivities of the sample grown at a Constant Temperature Gradient and growth rate were obtained using the Wiedemann–Franz and Smith–Palmer equations.
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the dependence of lamellar spacings and microhardness on the growth rate in the directionally solidified bi 43 wt sn alloy at a Constant Temperature Gradient
Metals and Materials International, 2009Co-Authors: Emin Çadırlı, Hasan Kaya, Necmettin MaraşlıAbstract:Bi-43 wt.% Sn eutectic samples were directionally solidified upward with five different growth rates (V = 8.3–164.8 µm/s) at a Constant Temperature Gradient (G = 3.55 K/mm) in a Bridgman type directional solidification furnace. The lamellar spacings (λ) and microhardness values (HV) were measured from the quenched samples; the directionally solidified Bi-43 wt.% Sn eutectic alloy and the minimum undercoolings (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of lamellar spacings (λ), microhardness (Hν) and undercooling (ΔT) on the growth rate (V) were analyzed. According to these results, it has been found that the value of λ decreases with the increasing value of V and that the values of HV and ΔT increase for a Constant G. The values of λ2V, λΔT and ΔT V−0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results.
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The dependence of lamellar spacings and microhardness on the growth rate in the directionally solidified Bi-43 wt.% Sn alloy at a Constant Temperature Gradient
Metals and Materials International, 2009Co-Authors: Emin Çadırlı, H Kaya, Necmettin MaraşlıAbstract:Bi-43 wt.% Sn eutectic samples were directionally solidified upward with five different growth rates (V = 8.3–164.8 µm/s) at a Constant Temperature Gradient (G = 3.55 K/mm) in a Bridgman type directional solidification furnace. The lamellar spacings (λ) and microhardness values (HV) were measured from the quenched samples; the directionally solidified Bi-43 wt.% Sn eutectic alloy and the minimum undercoolings (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of lamellar spacings (λ), microhardness (H_ν) and undercooling (ΔT) on the growth rate (V) were analyzed. According to these results, it has been found that the value of λ decreases with the increasing value of V and that the values of HV and ΔT increase for a Constant G. The values of λ^2V, λΔT and ΔT V^−0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results.
Necmettin Maraşlı - One of the best experts on this subject based on the ideXlab platform.
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Thermophysical properties of NPG solid solution in the NPG–SCN organic system
International Journal of Materials Research, 2018Co-Authors: Saadet B. Karadağ, Esra Öztürk, Sezen Aksöz, Necmettin MaraşlıAbstract:Abstract A horizontal linear heat flow apparatus connected to an optical microscope was used to directly observe the grain boundary groove shapes of solid neopentylglycol solution equilibrated with neopentylglycol-succinonitrile eutectic liquid at a Constant Temperature Gradient. The thermal conductivity variations with temperaure for solid neopentylglycol solution and neopentylglycol-succinonitrile eutectic solid were measured with a radial heat flow apparatus. By using the observed grain boundary groove shapes and measured values of Temperature Gradients and thermal conductivity of solid phase and liquid phase, the values of the Gibbs–Thomson coefficient, solid–liquid interfacial energy and grain boundary energy were determined for the solid neopentylglycol solution equilibrated with the neopentylglycol-succinonitrile eutectic liquid.
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Hardness and electrical resistivity of Al–13 wt % Mg2Si pseudoeutectic alloy
Russian Journal of Non-Ferrous Metals, 2017Co-Authors: Yusuf Kaygısız, Necmettin MaraşlıAbstract:In the present work, effect of growth rates on microhardness, electrical properties and microstructure for directionally solidified Al–13 wt % Mg2Si pseudoeutectic alloy at a Constant Temperature Gradient were studied. Directional solidification process were carried out with five different growth rates (V = 8.33–175.0 μm/s) at a Constant Temperature Gradient (G = 6.68 K/mm) by using a Bridgman type directional solidification furnace. Microstructure of directionally solidified Al–13 wt % Mg2Si pseudoeutectic alloy was observed as Mg2Si coral-like structure phase dispersed into primary α-Al phase matrix. The electrical resistivity for Al–13 wt % Mg2Si pseudoeutectic alloy, were measured by the d.c. four-point probe method. The dependency ofmicrohardness and electrical resistivity on growth rates were obtained as HV = 135.7 (V)0.09 and ρ = 17.30 × 10−8(V)0.08, respectively for Al–Mg2Si pseudoeutectic alloy. The results obtained in present work were compared with the previous similar experimental results.
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Hardness and electrical resistivity of Al–13 wt % Mg_2Si pseudoeutectic alloy
Russian Journal of Non-Ferrous Metals, 2017Co-Authors: Yusuf Kaygısız, Necmettin MaraşlıAbstract:In the present work, effect of growth rates on microhardness, electrical properties and microstructure for directionally solidified Al–13 wt % Mg_2Si pseudoeutectic alloy at a Constant Temperature Gradient were studied. Directional solidification process were carried out with five different growth rates ( V = 8.33–175.0 μm/s) at a Constant Temperature Gradient ( G = 6.68 K/mm) by using a Bridgman type directional solidification furnace. Microstructure of directionally solidified Al–13 wt % Mg_2Si pseudoeutectic alloy was observed as Mg_2Si coral-like structure phase dispersed into primary α-Al phase matrix. The electrical resistivity for Al–13 wt % Mg_2Si pseudoeutectic alloy, were measured by the d.c. four-point probe method. The dependency ofmicrohardness and electrical resistivity on growth rates were obtained as HV = 135.7 ( V )^0.09 and ρ = 17.30 × 10^−8(V)^0.08, respectively for Al–Mg_2Si pseudoeutectic alloy. The results obtained in present work were compared with the previous similar experimental results.
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the dependence of lamellar spacings and microhardness on the growth rate in the directionally solidified bi 43 wt sn alloy at a Constant Temperature Gradient
Metals and Materials International, 2009Co-Authors: Emin Çadırlı, Hasan Kaya, Necmettin MaraşlıAbstract:Bi-43 wt.% Sn eutectic samples were directionally solidified upward with five different growth rates (V = 8.3–164.8 µm/s) at a Constant Temperature Gradient (G = 3.55 K/mm) in a Bridgman type directional solidification furnace. The lamellar spacings (λ) and microhardness values (HV) were measured from the quenched samples; the directionally solidified Bi-43 wt.% Sn eutectic alloy and the minimum undercoolings (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of lamellar spacings (λ), microhardness (Hν) and undercooling (ΔT) on the growth rate (V) were analyzed. According to these results, it has been found that the value of λ decreases with the increasing value of V and that the values of HV and ΔT increase for a Constant G. The values of λ2V, λΔT and ΔT V−0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results.
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The dependence of lamellar spacings and microhardness on the growth rate in the directionally solidified Bi-43 wt.% Sn alloy at a Constant Temperature Gradient
Metals and Materials International, 2009Co-Authors: Emin Çadırlı, H Kaya, Necmettin MaraşlıAbstract:Bi-43 wt.% Sn eutectic samples were directionally solidified upward with five different growth rates (V = 8.3–164.8 µm/s) at a Constant Temperature Gradient (G = 3.55 K/mm) in a Bridgman type directional solidification furnace. The lamellar spacings (λ) and microhardness values (HV) were measured from the quenched samples; the directionally solidified Bi-43 wt.% Sn eutectic alloy and the minimum undercoolings (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of lamellar spacings (λ), microhardness (H_ν) and undercooling (ΔT) on the growth rate (V) were analyzed. According to these results, it has been found that the value of λ decreases with the increasing value of V and that the values of HV and ΔT increase for a Constant G. The values of λ^2V, λΔT and ΔT V^−0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results.
V. Berejnov - One of the best experts on this subject based on the ideXlab platform.
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On the thermocapillary motion of deformable droplets
Journal of Colloid and Interface Science, 2001Co-Authors: V. BerejnovAbstract:Abstract In studies on Marangoni type motion of particles the surface tension is often approximated as a linear function of Temperature. For deformable particles in a Constant-Temperature Gradient far from the reference point this approximation yields a negative surface tension, which is physically unrealistic. H. Zhou and R. H. Davis ( J. Colloid Interface Sci. 181 , 60 (1996)) presented calculations where the leading deformable drop moved into a region of negative surface tension. Here numerical studies detail the restriction of the migration of two deformable drops given in terms of the drift time.
Mehmet Gündüz - One of the best experts on this subject based on the ideXlab platform.
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Microstructural Evolution and Mechanical Properties in Directionally Solidified Sn–10.2 Sb Peritectic Alloy at a Constant Temperature Gradient
Materials Research, 2016Co-Authors: Elif Yılmaz, Emin Çadırlı, Emine Acer, Mehmet GündüzAbstract:The Sn–10.2 Sb (mass fraction) peritectic alloy was prepared using a vacuum melting furnace and a hot filling furnace. The samples were directionally solidified upwards at steady state conditions with a Constant Temperature Gradient (G=4.5±0.2 K. mm-1) under different growth velocities (V=13.3–266.7 µm. s-1) in a Bridgman-type directional solidification apparatus. The effects of the growth velocity (V) on the dendritic spacings were investigated. Primary dendrite arm spacing (PDAS) of α phase in directionally solidified Sn–10.2 Sb peritectic alloy was measured on the longitudinal and transverse sections of 4 mm diameter cylindrical samples. Secondary dendrite arm spacing (SDAS) was measured on the longitudinal section. The experimental results show that the measured PDAS (λ1L, λ1T) and SDAS (λ2) decrease with increasing growth velocity. The dependence of PDAS, SDAS, microhardness (HV) and compressive strength (σc) on the growth velocity were determined by using a linear regression analysis. The experimental results were compared with the previous experimental results and the results of the experimental models.
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microstructural evolution and mechanical properties in directionally solidified sn 10 2 sb peritectic alloy at a Constant Temperature Gradient
Materials Research-ibero-american Journal of Materials, 2016Co-Authors: Elif Yılmaz, Emin Çadırlı, Emine Acer, Mehmet GündüzAbstract:The Sn–10.2 Sb (mass fraction) peritectic alloy was prepared using a vacuum melting furnace and a hot filling furnace. The samples were directionally solidified upwards at steady state conditions with a Constant Temperature Gradient (G=4.5±0.2 K. mm-1) under different growth velocities (V=13.3–266.7 µm. s-1) in a Bridgman-type directional solidification apparatus. The effects of the growth velocity (V) on the dendritic spacings were investigated. Primary dendrite arm spacing (PDAS) of α phase in directionally solidified Sn–10.2 Sb peritectic alloy was measured on the longitudinal and transverse sections of 4 mm diameter cylindrical samples. Secondary dendrite arm spacing (SDAS) was measured on the longitudinal section. The experimental results show that the measured PDAS (λ1L, λ1T) and SDAS (λ2) decrease with increasing growth velocity. The dependence of PDAS, SDAS, microhardness (HV) and compressive strength (σc) on the growth velocity were determined by using a linear regression analysis. The experimental results were compared with the previous experimental results and the results of the experimental models.
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Directional solidification and characterization of the Cd-Sn eutectic alloy
Journal of Alloys and Compounds, 2007Co-Authors: Emin Çadırlı, Hasan Kaya, Mehmet GündüzAbstract:The Cd–67.8 wt.% Sn eutectic alloy was prepared by melting together appropriate amounts of cadmium and tin (both of 99.99% purity) in a graphite crucible in a vacuum melting furnace. Then, this eutectic alloy was poured into graphite crucibles in a hot filling furnace and the samples were solidified. These samples were directionally solidified upward with different growth rate ranges (8.1–165m/s) at a Constant Temperature Gradient G (4.35 K/mm) in the Bridgman type directional solidification furnace. The lamellar spacings were measured using directional solidified samples. The variations of λ with respect to V were determined by using linear regression analysis. The dependence of lamellar spacings λ on
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Dendritic Growth in an Aluminum-Silicon Alloy
Journal of Materials Engineering and Performance, 2007Co-Authors: H Kaya, Emin Çadırlı, Mehmet GündüzAbstract:Unidirectional solidification experiments have been carried out on an Al-3 wt.% Si alloy as a function of Temperature Gradient, G and growth rate, V . The samples were solidified under steady-state conditions with a Constant growth rate of 8.20 μm/s at different Temperature Gradients (1.97-6.84 K/mm) and with a Constant Temperature Gradient (6.84 K/mm) at different growth rates (8.20-492.76 μm/s). Microstructure parameters (primary dendrite arm spacing, λ_1, secondary dendrite arm spacing, λ_2, dendrite tip radius, R and mushy zone depth, d ) were measured as a function of Temperature Gradient and growth rate. The experimental results have been compared with the current theoretical models and similar experimental works.
Hasan Kaya - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the Some Physical Properties of the Directionally Solidified Al–Cu–Co Ternary Eutectic Alloy
Transactions of The Indian Institute of Metals, 2015Co-Authors: Emin Çadırlı, Izzettin Yilmazer, Mevlüt Şahin, Hasan KayaAbstract:The Al–23.9% Cu–1.2% Co (wt%) ternary eutectic alloy was prepared using a vacuum melting furnace and a casting furnace. The samples were directionally solidified upwards at a Constant growth velocity (18.8 μm/s) under different Temperature Gradients (1.23–5.66 K/mm) and at a Constant Temperature Gradient (5.66 K/mm) under different growth velocities (8.3–166 μm/s) in a Bridgman-type directional solidification furnace. The dependence of the eutectic spacing on the solidification parameters (Temperature Gradient and growth rate) and that of the microhardness and compressive strength on the eutectic spacing and solidification parameters were investigated. The electrical resistivity measurements of the studied alloy were performed and the Temperature coefficient of the resistivity was calculated from the curve of the resulting ρ–Τ plot. The thermal conductivities of the sample grown at a Constant Temperature Gradient and growth rate were obtained using the Wiedemann–Franz and Smith–Palmer equations.
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the dependence of lamellar spacings and microhardness on the growth rate in the directionally solidified bi 43 wt sn alloy at a Constant Temperature Gradient
Metals and Materials International, 2009Co-Authors: Emin Çadırlı, Hasan Kaya, Necmettin MaraşlıAbstract:Bi-43 wt.% Sn eutectic samples were directionally solidified upward with five different growth rates (V = 8.3–164.8 µm/s) at a Constant Temperature Gradient (G = 3.55 K/mm) in a Bridgman type directional solidification furnace. The lamellar spacings (λ) and microhardness values (HV) were measured from the quenched samples; the directionally solidified Bi-43 wt.% Sn eutectic alloy and the minimum undercoolings (ΔT) were determined from the Jackson-Hunt eutectic theory. The dependency of lamellar spacings (λ), microhardness (Hν) and undercooling (ΔT) on the growth rate (V) were analyzed. According to these results, it has been found that the value of λ decreases with the increasing value of V and that the values of HV and ΔT increase for a Constant G. The values of λ2V, λΔT and ΔT V−0.5 were determined by using the values of λ, ΔT and V. The results obtained in the present work have been compared with those predicted by the Jackson-Hunt eutectic theory and with similar experimental results.
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Directional solidification and characterization of the Cd-Sn eutectic alloy
Journal of Alloys and Compounds, 2007Co-Authors: Emin Çadırlı, Hasan Kaya, Mehmet GündüzAbstract:The Cd–67.8 wt.% Sn eutectic alloy was prepared by melting together appropriate amounts of cadmium and tin (both of 99.99% purity) in a graphite crucible in a vacuum melting furnace. Then, this eutectic alloy was poured into graphite crucibles in a hot filling furnace and the samples were solidified. These samples were directionally solidified upward with different growth rate ranges (8.1–165m/s) at a Constant Temperature Gradient G (4.35 K/mm) in the Bridgman type directional solidification furnace. The lamellar spacings were measured using directional solidified samples. The variations of λ with respect to V were determined by using linear regression analysis. The dependence of lamellar spacings λ on
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Dependency of the dendritic arm spacings and tip radius on the growth rate and composition in the directionally solidified succinonitrile–carbon tetrabromide alloys
Journal of Crystal Growth, 2005Co-Authors: Hasan Kaya, Emin Çadırlı, Kazım Keslioglu, Necmettin MaraşlıAbstract:Abstract Succinonitrile (SCN)–carbon tetrabromide (CTB) alloys for different concentrations of CTB ( C 0 ) were unidirectionally solidified with a Constant Temperature Gradient ( G =7.5 K/mm) at different growth rates ( V =6.5–103.5 μm/s). The primary dendrite arm spacings, secondary dendrite arm spacings and dendrite tip radius were measured as a function of growth rates and compositions. Theoretical models for the dendrite arm spacings and tip radius have been compared with the experimental observations, and a comparison of our results with the current theoretical models and previous experimental results have also been made.
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effect of growth rate and composition on the primary spacing the dendrite tip radius and mushy zone depth in the directionally solidified succinonitrile salol alloys
Journal of Crystal Growth, 2003Co-Authors: Emin Çadırlı, Hasan Kaya, I Karaca, Necmettin MaraşlıAbstract:The succinonitrile (SCN)–Salol alloys for four different concentrations Salol were unidirectionally solidified for five different growth rates in a Constant Temperature Gradient. The microstructure parameters, viz., the primary dendrite arm spacing, λ1, dendrite tip radius, R and mushy zone depth, d, were measured. The dependence of the microstructure parameters on the solidification parameters for SCN–Salol alloys were determined by linear regression analysis. The results are compared with theoretical models and published data.