The Experts below are selected from a list of 2790 Experts worldwide ranked by ideXlab platform
Shoumei Xiong - One of the best experts on this subject based on the ideXlab platform.
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determination of the interfacial heat transfer coefficient at the metal Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
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Determination of the interfacial heat transfer coefficient at the metal-Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Z. Guo, Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
Aihua Zhang - One of the best experts on this subject based on the ideXlab platform.
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determination of the interfacial heat transfer coefficient at the metal Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
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Determination of the interfacial heat transfer coefficient at the metal-Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Z. Guo, Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
S Liang - One of the best experts on this subject based on the ideXlab platform.
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determination of the interfacial heat transfer coefficient at the metal Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
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Determination of the interfacial heat transfer coefficient at the metal-Sand Mold interface in low pressure Sand casting
Experimental Thermal and Fluid Science, 2017Co-Authors: Z. Guo, Aihua Zhang, S Liang, Shoumei XiongAbstract:Abstract The interfacial heat transfer coefficient (IHTC) at the metal-Sand Mold interface was determined by applying a nonlinear inverse estimation method during the low pressure Sand casting (LPSC) process. Experiments were conducted using plate shape castings with different thicknesses for both ZL205A and ZL114A aluminum alloys. A specific temperature sensor unit was developed to measure accurately the temperature evolution inside the Sand Mold, based on which the IHTC was estimated. Results showed that the time-dependent IHTC during the LPSC mainly comprised two stages, i.e., rapid increasing stage and maintain stage, and the second stage could be further divided into two parts based on the plate thickness. Besides, the IHTC was found to be also highly dependent on the casting material, especially the maximum value. Further analysis also revealed that the estimation accuracy of the inverse method was increased by 50% if the temperature dependence of the thermo-physical parameters was considered, rather than normally constant treatment or simple linear interpolation versus temperature.
Mohamed El Mansori - One of the best experts on this subject based on the ideXlab platform.
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Assessment of the effect of 3D printed Sand Mold thickness on solidification process of AlSi13 casting alloy
The International Journal of Advanced Manufacturing Technology, 2021Co-Authors: Mariem Ben Saada, Mohamed El MansoriAbstract:The present work addresses the printed Sand Mold thickness effect on the solidification process of a eutectic aluminum-silicon alloy (AlSi13). Several Sand Mold thicknesses (varying from 3 to 30 mm) are numerically studied using Quikcast® software. The study shows that the solidification time decreases when the Sand thickness of Mold increases. It is accelerated by more than 40% when the Sand Mold thickness increases from 3 to 30 mm. The numerical simulations are coupled with experiments. Indeed, the 3D Sand printing process is used to fabricate Molds presenting different thicknesses of 5 mm and 30 mm, respectively. In addition, the same printing parameters are applied for producing all Sand Molds. The comparison between both numerical and experimental results shows the same tendency according to the Sand Mold thickness. The results indicate that increasing the Sand Mold thickness from 5 to 30 mm allows to accelerate the solidification by 17% and 18.6%, respectively, in the numerical and experimental results. A finer microstructure is obtained when reducing the solidification time, which enhances the hardness of casting properties.
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Effect of process parameters on flexure strength and gas permeability of 3D printed Sand Molds
Journal of Manufacturing Processes, 2020Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Nicolas Coniglio, Matthew DarguschAbstract:Abstract 3D printed Sand Molds for the casting industry play a vital role in manufacturing intricate parts using a computer model. The possibility of producing fairly significant structural castings using a small job-box 3D Sand Mold printer is another advantage compared to the direct metal 3D printing processes. It is important to identify the relationship between the process parameters and the properties of the Sand Mold to produce a Mold with the required strength, permeability and stiffness; to reduce gas emissions during casting and minimize the mass of combustible materials in the Mold. Hence, it is possible to create an excellent casting by improving the design of such Molds for liquid alloy filling and solidification. The relationship between the printing parameters and the properties of the Mold can be a great tool for foundrymen, primarily to optimize the strength and permeability properties of these Molds and therefore to provide exact boundary conditions for the solidification simulation prior to a casting trial. This paper reports on a study of a basic outline to quantify the role of the Sand Mold printing process parameters, particularly the recoater speed and print resolution, on the Mold strength and permeability, and their impacts on the anisotropic behavior of the printed Sand Molds.
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Effect of process parameters on flexure strength and gas permeability of 3D printed Sand Molds
Journal of Manufacturing Processes, 2020Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Matthew Dargusch, Nicolas ConiglioAbstract:3D printed Sand Molds for the casting industry play a vital role in manufacturing intricate parts from a computer model. The possibility of producing fairly significant structural castings using a small job-box 3D Sand Mold printer is another advantage compared to the direct metal 3D printing processes. It is important to identify the relationship between the process parameters and the properties of the Sand Mold in order to produce a Mold with the required strength, permeability and stiffness; to reduce gas emissions during casting and minimize the mass of combustible materials in the Mold. Hence, it is possible to create an excellent casting by improving the design of such Molds for liquid alloy filling and solidification. The relationship between the printing parameters and the properties of the Mold can be a great tool for foundrymen, primarily to optimize the strength and permeability properties of these Molds and therefore to provide exact boundary conditions for the solidification simulation prior to a casting trial. This paper reports on a study of a basic outline to quantify the role of the Sand Mold printing process parameters, particularly the recoater speed and print resolution, on the Mold strength and permeability, and their impacts on the anisotropic behavior of the printed Sand Molds.
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Study of the evolution of transport properties induced by additive processing Sand Mold using X-ray computed tomography
Journal of Materials Processing Technology, 2020Co-Authors: Saptarshee Mitra, Mohamed El Mansori, Antonio RodrÍguez De Castro, Marius CostinAbstract:Accurate characterization of the mass transport properties of additively processed Sand Molds is essential in order to achieve reproducibility of the produced castings and control of gas defects in foundry industries. The present work highlights the potential use of X-ray micro-computed tomography (μ-CT) to characterize the evolution of permeability and some major microstructural features of such additively processed Sand Molds. The evolution of mass transport properties of Sand Mold samples under specific processing conditions met in additive manufacturing and its influence on the porosity, the permeability, the tortuosity, and the pore and throat size distributions were characterized from 3D images provided by X-Ray μ-CT. The obtained results showed that the mass transport properties of additively processed Sand Molds can be closely predicted by using non-destructive in situ methods, such that improvements to the casting can be made to create more optimized 3D printed structures for foundry applications.
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Reduced consumption of materials and hazardous chemicals for energy efficient production of metal parts through 3D printing of Sand Molds
Journal of Cleaner Production, 2019Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Meet Upadhyay, Yahia Ali, Matthew DarguschAbstract:Metals remain essential structural materials for many demanding engineering applications requiring high strength at elevated temperatures and good performance in environments subjected to high thermal fluctuations such as often encountered in the automotive, rail and aircraft industries. The Sand-casting process is one of the most preferred methods of producing complex and intricate shaped components out of metals with good strength at elevated temperatures. Unfortunately, the Sand casting process also leads to the direct and indirect production of carbon dioxide. Three-dimensional Sand Mold printing has been revolutionizing traditional production methods by reducing the unnecessary consumption of metal and chemicals when manufacturing a part through Sand casting. This paper explores the opportunities that are emerging in the area of 3D printing of Sand Molds and the positive impact that these new technologies and practices are having on the environmental impact of current Sand-casting processes. The paper demonstrates that 3D printing of Sand Molds enables new manufacturing strategies reducing the direct CO emissions and reducing the amount of metal required by enabling design optimization of both the component and Mold/core assembly. Further benefits will be realized through the development of environmentally friendly binder systems.
Matthew Dargusch - One of the best experts on this subject based on the ideXlab platform.
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Effect of process parameters on flexure strength and gas permeability of 3D printed Sand Molds
Journal of Manufacturing Processes, 2020Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Nicolas Coniglio, Matthew DarguschAbstract:Abstract 3D printed Sand Molds for the casting industry play a vital role in manufacturing intricate parts using a computer model. The possibility of producing fairly significant structural castings using a small job-box 3D Sand Mold printer is another advantage compared to the direct metal 3D printing processes. It is important to identify the relationship between the process parameters and the properties of the Sand Mold to produce a Mold with the required strength, permeability and stiffness; to reduce gas emissions during casting and minimize the mass of combustible materials in the Mold. Hence, it is possible to create an excellent casting by improving the design of such Molds for liquid alloy filling and solidification. The relationship between the printing parameters and the properties of the Mold can be a great tool for foundrymen, primarily to optimize the strength and permeability properties of these Molds and therefore to provide exact boundary conditions for the solidification simulation prior to a casting trial. This paper reports on a study of a basic outline to quantify the role of the Sand Mold printing process parameters, particularly the recoater speed and print resolution, on the Mold strength and permeability, and their impacts on the anisotropic behavior of the printed Sand Molds.
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Effect of process parameters on flexure strength and gas permeability of 3D printed Sand Molds
Journal of Manufacturing Processes, 2020Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Matthew Dargusch, Nicolas ConiglioAbstract:3D printed Sand Molds for the casting industry play a vital role in manufacturing intricate parts from a computer model. The possibility of producing fairly significant structural castings using a small job-box 3D Sand Mold printer is another advantage compared to the direct metal 3D printing processes. It is important to identify the relationship between the process parameters and the properties of the Sand Mold in order to produce a Mold with the required strength, permeability and stiffness; to reduce gas emissions during casting and minimize the mass of combustible materials in the Mold. Hence, it is possible to create an excellent casting by improving the design of such Molds for liquid alloy filling and solidification. The relationship between the printing parameters and the properties of the Mold can be a great tool for foundrymen, primarily to optimize the strength and permeability properties of these Molds and therefore to provide exact boundary conditions for the solidification simulation prior to a casting trial. This paper reports on a study of a basic outline to quantify the role of the Sand Mold printing process parameters, particularly the recoater speed and print resolution, on the Mold strength and permeability, and their impacts on the anisotropic behavior of the printed Sand Molds.
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Reduced consumption of materials and hazardous chemicals for energy efficient production of metal parts through 3D printing of Sand Molds
Journal of Cleaner Production, 2019Co-Authors: Tharmalingam Sivarupan, Mohamed El Mansori, Meet Upadhyay, Yahia Ali, Matthew DarguschAbstract:Metals remain essential structural materials for many demanding engineering applications requiring high strength at elevated temperatures and good performance in environments subjected to high thermal fluctuations such as often encountered in the automotive, rail and aircraft industries. The Sand-casting process is one of the most preferred methods of producing complex and intricate shaped components out of metals with good strength at elevated temperatures. Unfortunately, the Sand casting process also leads to the direct and indirect production of carbon dioxide. Three-dimensional Sand Mold printing has been revolutionizing traditional production methods by reducing the unnecessary consumption of metal and chemicals when manufacturing a part through Sand casting. This paper explores the opportunities that are emerging in the area of 3D printing of Sand Molds and the positive impact that these new technologies and practices are having on the environmental impact of current Sand-casting processes. The paper demonstrates that 3D printing of Sand Molds enables new manufacturing strategies reducing the direct CO emissions and reducing the amount of metal required by enabling design optimization of both the component and Mold/core assembly. Further benefits will be realized through the development of environmentally friendly binder systems.
