The Experts below are selected from a list of 24942 Experts worldwide ranked by ideXlab platform
P. Bowen - One of the best experts on this subject based on the ideXlab platform.
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Tensile and fracture toughness properties of SiC_p reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The goal of this work was to evaluate the effects of Particle size, Particle Volume Fraction, and matrix strength on the monotonic fracture properties of two different Al alloys, namely T1-Al2124 and T1-Al6061, reinforced with silicon carbide Particles (SiC_p). From the tensile tests, an increase in Particle Volume Fraction and/or matrix strength increased strength and decreased ductility. On the other hand, an increase in Particle size reduced strength and increased the composite ductility. In fracture toughness tests, an increase in Particle Volume Fraction reduced the toughness of the composites. An increase in matrix strength reduced both K _crit and δ_crit values. However, in terms of K _Q (5%) values, the Al6061 composite showed a value similar to the corresponding Al2124 composite. This was mainly attributed to premature yielding caused by the high ductility/low strength of the Al6061 matrix and the testpiece dimensions. The effect of Particle size on the fracture toughness depends on the type of matrix and toughness parameter used. In general, an increase in Particle size decreased the K _Q (5%) value, but simultaneously increased the amount of plastic strain that the matrix is capable of accommodating, increasing both δ_crit and K _crit values.
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Tensile and fracture toughness properties of SiCp reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The goal of this work was to evaluate the effects of Particle size, Particle Volume Fraction, and matrix strength on the monotonic fracture properties of two different Al alloys, namely T1-Al2124 and T1-Al6061, reinforced with silicon carbide Particles (SiCp). From the tensile tests, an increase in Particle Volume Fraction and/or matrix strength increased strength and decreased ductility. On the other hand, an increase in Particle size reduced strength and increased the composite ductility. In fracture toughness tests, an increase in Particle Volume Fraction reduced the toughness of the composites. An increase in matrix strength reduced both K crit and δcrit values. However, in terms of K Q (5%) values, the Al6061 composite showed a value similar to the corresponding Al2124 composite. This was mainly attributed to premature yielding caused by the high ductility/low strength of the Al6061 matrix and the testpiece dimensions. The effect of Particle size on the fracture toughness depends on the type of matrix and toughness parameter used. In general, an increase in Particle size decreased the K Q (5%) value, but simultaneously increased the amount of plastic strain that the matrix is capable of accommodating, increasing both δcrit and K crit values.
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Fatigue crack growth resistance of SiCp reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The main aim of this work was to study the effects of Particle size, Particle Volume Fraction, and matrix strength on the long fatigue crack growth resistance of two different grades of Al alloys (Al2124-T1 and Al6061-T1) reinforced with SiC Particles. Basically, it was found that an increase in Particle Volume Fraction and Particle size increases the fatigue crack growth resistance at near threshold and Paris regimen, with matrix strength having a smaller effect. Near final failure, the stronger and more brittle composites are affected more by static modes of failure as the applied maximum stress intensity factor (K max) approaches mode I plane strain fracture toughness (K IC).
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Effects of Particle size, Particle Volume Fraction and matrix composition on the fatigue crack growth resistance of Al alloy/Al alloy + SiCp bimaterials
Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications, 2002Co-Authors: M T Milan, P. BowenAbstract:AbstractThe fatigue crack growth resistance of Al alloy/Al alloy + SiCp bimaterials for crack growth perpendicular to the interface is affected by thermal residual stresses, elastic mismatch, plastic mismatch and direction of crack approach to the interface. When the crack approaches the interface from the composite side, the crack growth resistance is mainly controlled by the compressive residual stress near to the interface. Conversely, when the crack grows from the aluminium side towards the composite, the crack is shielded primarily by the elastic/plastic mismatch. In this work, the effects of Particle size, Particle Volume Fraction and matrix composition on the fatigue crack growth resistance of Al alloy/Al alloy + SiCp bimaterials have been assessed. These parameters can affect both the thermal residual stress profile and the elastic/plastic mismatch, and hence the effective crack tip driving force for crack extension is also affected.
M. T. Milan - One of the best experts on this subject based on the ideXlab platform.
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Tensile and fracture toughness properties of SiC_p reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The goal of this work was to evaluate the effects of Particle size, Particle Volume Fraction, and matrix strength on the monotonic fracture properties of two different Al alloys, namely T1-Al2124 and T1-Al6061, reinforced with silicon carbide Particles (SiC_p). From the tensile tests, an increase in Particle Volume Fraction and/or matrix strength increased strength and decreased ductility. On the other hand, an increase in Particle size reduced strength and increased the composite ductility. In fracture toughness tests, an increase in Particle Volume Fraction reduced the toughness of the composites. An increase in matrix strength reduced both K _crit and δ_crit values. However, in terms of K _Q (5%) values, the Al6061 composite showed a value similar to the corresponding Al2124 composite. This was mainly attributed to premature yielding caused by the high ductility/low strength of the Al6061 matrix and the testpiece dimensions. The effect of Particle size on the fracture toughness depends on the type of matrix and toughness parameter used. In general, an increase in Particle size decreased the K _Q (5%) value, but simultaneously increased the amount of plastic strain that the matrix is capable of accommodating, increasing both δ_crit and K _crit values.
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Tensile and fracture toughness properties of SiCp reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The goal of this work was to evaluate the effects of Particle size, Particle Volume Fraction, and matrix strength on the monotonic fracture properties of two different Al alloys, namely T1-Al2124 and T1-Al6061, reinforced with silicon carbide Particles (SiCp). From the tensile tests, an increase in Particle Volume Fraction and/or matrix strength increased strength and decreased ductility. On the other hand, an increase in Particle size reduced strength and increased the composite ductility. In fracture toughness tests, an increase in Particle Volume Fraction reduced the toughness of the composites. An increase in matrix strength reduced both K crit and δcrit values. However, in terms of K Q (5%) values, the Al6061 composite showed a value similar to the corresponding Al2124 composite. This was mainly attributed to premature yielding caused by the high ductility/low strength of the Al6061 matrix and the testpiece dimensions. The effect of Particle size on the fracture toughness depends on the type of matrix and toughness parameter used. In general, an increase in Particle size decreased the K Q (5%) value, but simultaneously increased the amount of plastic strain that the matrix is capable of accommodating, increasing both δcrit and K crit values.
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Fatigue crack growth resistance of SiCp reinforced Al alloys: Effects of Particle size, Particle Volume Fraction, and matrix strength
Journal of Materials Engineering and Performance, 2004Co-Authors: M. T. Milan, P. BowenAbstract:The main aim of this work was to study the effects of Particle size, Particle Volume Fraction, and matrix strength on the long fatigue crack growth resistance of two different grades of Al alloys (Al2124-T1 and Al6061-T1) reinforced with SiC Particles. Basically, it was found that an increase in Particle Volume Fraction and Particle size increases the fatigue crack growth resistance at near threshold and Paris regimen, with matrix strength having a smaller effect. Near final failure, the stronger and more brittle composites are affected more by static modes of failure as the applied maximum stress intensity factor (K max) approaches mode I plane strain fracture toughness (K IC).
Dominique Doucet - One of the best experts on this subject based on the ideXlab platform.
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new temperature dependent thermal conductivity data for water based nanofluids
International Journal of Thermal Sciences, 2009Co-Authors: Honorine Angue Mintsa, Gilles Roy, Cong Tam Nguyen, Dominique DoucetAbstract:Abstract This paper presents effective thermal conductivity measurements of alumina/water and copper oxide/water nanofluids. The effects of Particle Volume Fraction, temperature and Particle size were investigated. Readings at ambient temperature as well as over a relatively large temperature range were made for various Particle Volume Fractions up to 9%. Results clearly show the predicted overall effect of an increase in the effective thermal conductivity with an increase in Particle Volume Fraction and with a decrease in Particle size. Furthermore, the relative increase in thermal conductivity was found to be more important at higher temperatures. Obtained results compare favorably with certain data sets and theoretical models found in current literature.
Yenkai Yang - One of the best experts on this subject based on the ideXlab platform.
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effects of Particle Volume Fraction on spray heat transfer performance of al2o3 water nanofluid
International Journal of Heat and Mass Transfer, 2012Co-Authors: Tongbou Chang, Siouci Syu, Yenkai YangAbstract:Abstract An experimental investigation is conducted into the effects of the Particle Volume Fraction on the spray heat transfer performance of a nanofluid comprising de-ionized water and Al2O3 Particles with a diameter of 35 nm. The tests are performed with a flat, horizontal heated surface using a nozzle with an orifice diameter of 0.7 mm and a nozzle-to-heated surface distance of 17 mm. The spray mass flux is varied in the range of 26.433–176.751 kg/m2 s, while the Particle Volume Fraction is specified as 0%, 0.001%, 0.025%, or 0.05%. It is found that the optimal heat transfer performance is obtained using a Particle Volume Fraction of 0.001%. The surface compositions of the sprayed samples are observed using scanning electron microscopy. The results show that the surfaces sprayed with a nanofluid containing 0.025 Vol% or 0.05 Vol% of nanoParticles contain a small amount of Al. However, those cooled using a nanofluid with a Particle Volume Fraction of 0% or 0.001% show no traces of Al.
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Effects of Particle Volume Fraction on spray heat transfer performance of Al2O3–water nanofluid
International Journal of Heat and Mass Transfer, 2012Co-Authors: Tongbou Chang, Siouci Syu, Yenkai YangAbstract:Abstract An experimental investigation is conducted into the effects of the Particle Volume Fraction on the spray heat transfer performance of a nanofluid comprising de-ionized water and Al2O3 Particles with a diameter of 35 nm. The tests are performed with a flat, horizontal heated surface using a nozzle with an orifice diameter of 0.7 mm and a nozzle-to-heated surface distance of 17 mm. The spray mass flux is varied in the range of 26.433–176.751 kg/m2 s, while the Particle Volume Fraction is specified as 0%, 0.001%, 0.025%, or 0.05%. It is found that the optimal heat transfer performance is obtained using a Particle Volume Fraction of 0.001%. The surface compositions of the sprayed samples are observed using scanning electron microscopy. The results show that the surfaces sprayed with a nanofluid containing 0.025 Vol% or 0.05 Vol% of nanoParticles contain a small amount of Al. However, those cooled using a nanofluid with a Particle Volume Fraction of 0% or 0.001% show no traces of Al.
Thierry Mare - One of the best experts on this subject based on the ideXlab platform.
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viscosity of carbon nanotubes water based nanofluids influence of concentration and temperature
International Journal of Thermal Sciences, 2013Co-Authors: Salma Halelfadl, Patrice Estelle, Bahadir Aladag, Nimeti Doner, Thierry MareAbstract:Abstract Experimental results on the steady-state viscosity of carbon nanotubes water-based nanofluids are presented considering the influence of Particle Volume Fraction and temperature ranging from 0 to 40 °C. The suspensions consist of multi-walled carbon nanotubes dispersed in de-ionized water and they are stabilized by a surfactant. The aspect ratio of nanotubes is close to 160 and the Particle Volume Fraction varies between 0.0055% and 0.55%. It is shown that the nanofluids behave as shear-thinning materials for high Particle content. For lower Particle content, the nanofluids are quite Newtonian. It is also observed that the relative viscosity of nanofluids at high shear rate does not vary with temperature. Moreover, the evolution of relative viscosity at high shear rate is well predicted by the Maron–Pierce model considering the effect of nanoParticles agglomerates.
