The Experts below are selected from a list of 15702 Experts worldwide ranked by ideXlab platform
Jean‐pierre Kruth - One of the best experts on this subject based on the ideXlab platform.
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Onlizne quality control of Selective Laser Melting
22nd Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2011, 2011Co-Authors: Tom Craeghs, Stijn Clijsters, Evren Yasa, Jean‐pierre KruthAbstract:Selective Laser Melting (SLM) is an Additive Manufacturing technique which allows producing three-dimensional metallic parts from powder material, using a layer-by-layer fashion. Typical applications of this technology are parts with high geometrical complexity or internal features such as biomedical implants or casting molds with conformal cooling channels. In order to break through in industries with very high quality standards (such as aerospace industries), an important issue to be addressed is quality monitoring and control during the actual building process. Online quality control can significantly increase the robustness of the process by enabling to check the quality of the building process in the earliest possible stage, such that eventually corrective actions can be taken during the process. This is in contrast with on-line and a posteriori quality control which does not allow taking corrective measures if the quality of the part does not meet the desired quality standard. The development of a framework for online quality control of Selective Laser Melting is the subject of this paper. The framework consists of two complementary systems: A system for visual inspection of powder deposition and a system for online and real-time monitoring of the melt pool. A combination of these two systems enables to guarantee the quality of SLM parts with high confidence.
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Online quality control of Selective Laser Melting
Solid Freeform Fabrication Proceedings, 2011Co-Authors: Tom Craeghs, Jean‐pierre Kruth, Stijn Clijsters, Evren YasaAbstract:Selective Laser Melting (SLM) is an Additive Manufacturing technique which allows producing three-dimensional metallic parts from powder material, using a layer-by-layer fashion. Typical applications of this technology are parts with high geometrical complexity or internal features such as biomedical implants or casting molds with conformal cooling channels. In order to break through in industries with very high quality standards (such as aerospace industries), an important issue to be addressed is quality monitoring and control during the actual building process. Online quality control can significantly increase the robustness of the process by enabling to check the quality of the building process in the earliest possible stage, such that eventually corrective actions can be taken during the process. This is in contrast with on-line and a posteriori quality control which does not allow taking corrective measures if the quality of the part does not meet the desired quality standard. The development of a framework for online quality control of Selective Laser Melting is the subject of this paper. The framework consists of two complementary systems: a system for visual inspection of powder deposition and a system for online and real-time monitoring of the melt pool. A combination of these two systems enables to guarantee the quality of SLM parts with high confidence.
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Feedback control of Selective Laser Melting
2007Co-Authors: Peter Mercelis, Jean‐pierre Kruth, Jo Van VaerenberghAbstract:Selective Laser Melting (SLM) is a powder bed based Rapid Manufacturing (RM) process in which parts are built by Selective Melting of layers of powders by means of a Laser source. The main advantage of this technique is the possibility of making very complex and custom made pieces in a rather fast way. In this paper a feedback control system for Selective Laser Melting is presented. A feedback control system with a high-speed CMOS camera and a photodiode has been installed on the SLM-machine developed at K.U.Leuven-PMA. Both sensors were used independently to keep the melt pool area constant, especially in the case of scanning overhanging structures in which the melt pool would become very large. First motivation for the feedback system and the outline of the feedback system will be described. Next case studies are presented, in which both the photodiode as the CMOS camera have been used to control the SLM process. Clearly, the feedback control system can improve the surface quality of the lower surface of the overhang. Figure 1: (left) top view of bad part contour at sharp corner (right) side view of dross formation at down facing surfaces Bad sharp corner Dross formation Y
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Feedback control of Selective Laser Melting
Proceedings of the …, 2007Co-Authors: Jean‐pierre Kruth, J Van Vaerenbergh, Peter Mercelis, Jo Van Vaerenbergh, Tom CraeghsAbstract:Selective Laser Melting (SLM) is a powder bed based Rapid Manufacturing (RM) process in which parts are built by Selective Melting of layers of powders by means of a Laser source. The main advantage of this technique is the possibility of making very complex and custom made pieces in a rather fast way. In this paper a feedback control system for Selective Laser Melting is presented. A feedback control system with a high-speed CMOS camera and a photodiode has been installed on the SLM-machine developed at K.U.Leuven-PMA. Both sensors were used independently to keep the melt pool area constant, especially in the case of scanning overhanging structures in which the melt pool would become very large. First motivation for the feedback system and the outline of the feedback system will be described. Next case studies are presented, in which both the photodiode as the CMOS camera have been used to control the SLM - process. Clearly, the feedback control system can improve the surface quality of the lower surface of the overhang.
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Binding mechanisms in Selective Laser sintering and Selective Laser Melting
Rapid Prototyping Journal, 2005Co-Authors: Jean‐pierre Kruth, J Van Vaerenbergh, Peter Mercelis, Jo Van Vaerenbergh, Ludo Froyen, Marleenl RomboutsAbstract:Binding mechanisms in Selective Laser sintering and Selective Laser Melting
Jürgen Eckert - One of the best experts on this subject based on the ideXlab platform.
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Selective Laser Melting of a beta-solidifying TNM-B1 titanium aluminide alloy
Journal of Materials Processing Technology, 2014Co-Authors: Lukas Löber, Frank Peter Schimansky, Uta Kühn, Florian Pyczak, Jürgen EckertAbstract:Abstract The interest for a wider range of useable materials for the technology of Selective Laser Melting is growing. In this work we describe a new way to optimize the process parameters for Selective Laser Melting of a beta solidifying titanium aluminide. This kind of material has so far not been processed successfully by this method. The new approach is easy to conduct and well transferable to other materials. It is based on the fact that the parts generated from Selective Laser Melting can be described by an addition of multiple single tracks. Multiple types of single track experiments are performed and in combination with knowledge from Laser welding tests optimized parameter combinations are derived. Compact samples are built with the optimized process parameters and characterized in terms of microstructure, phase composition and mechanical properties. With this technique the generation of a TNMB1 titanium aluminide alloy sample with a density greater than 99% could be achieved. The mechanical properties are comparable with material produced by conventional techniques.
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Selective Laser Melting of a beta-solidifying TNM-B1 titanium aluminide alloy
Journal of Materials Processing Technology, 2014Co-Authors: Lukas Löber, Frank Peter Schimansky, Uta Kühn, Jürgen Eckert, Lukas Löber, Uta Kühn, Florian Pyczak, Jürgen EckertAbstract:The interest for a wider range of useable materials for the technology of Selective Laser Melting is growing. In this work we describe a new way to optimize the process parameters for Selective Laser Melting of a beta solidifying titanium aluminide. This kind of material has so far not been processed successfully by this method. The new approach is easy to conduct and well transferable to other materials. It is based on the fact that the parts generated from Selective Laser Melting can be described by an addition of multiple single tracks. Multiple types of single track experiments are performed and in combination with knowledge from Laser welding tests optimized parameter combinations are derived. Compact samples are built with the optimized process parameters and characterized in terms of microstructure, phase composition and mechanical properties. With this technique the generation of a TNMB1 titanium aluminide alloy sample with a density greater than 99% could be achieved. The mechanical properties are comparable with material produced by conventional techniques. © 2014 Elsevier B.V.
Tom Craeghs - One of the best experts on this subject based on the ideXlab platform.
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Onlizne quality control of Selective Laser Melting
22nd Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2011, 2011Co-Authors: Tom Craeghs, Stijn Clijsters, Evren Yasa, Jean‐pierre KruthAbstract:Selective Laser Melting (SLM) is an Additive Manufacturing technique which allows producing three-dimensional metallic parts from powder material, using a layer-by-layer fashion. Typical applications of this technology are parts with high geometrical complexity or internal features such as biomedical implants or casting molds with conformal cooling channels. In order to break through in industries with very high quality standards (such as aerospace industries), an important issue to be addressed is quality monitoring and control during the actual building process. Online quality control can significantly increase the robustness of the process by enabling to check the quality of the building process in the earliest possible stage, such that eventually corrective actions can be taken during the process. This is in contrast with on-line and a posteriori quality control which does not allow taking corrective measures if the quality of the part does not meet the desired quality standard. The development of a framework for online quality control of Selective Laser Melting is the subject of this paper. The framework consists of two complementary systems: A system for visual inspection of powder deposition and a system for online and real-time monitoring of the melt pool. A combination of these two systems enables to guarantee the quality of SLM parts with high confidence.
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Online quality control of Selective Laser Melting
Solid Freeform Fabrication Proceedings, 2011Co-Authors: Tom Craeghs, Jean‐pierre Kruth, Stijn Clijsters, Evren YasaAbstract:Selective Laser Melting (SLM) is an Additive Manufacturing technique which allows producing three-dimensional metallic parts from powder material, using a layer-by-layer fashion. Typical applications of this technology are parts with high geometrical complexity or internal features such as biomedical implants or casting molds with conformal cooling channels. In order to break through in industries with very high quality standards (such as aerospace industries), an important issue to be addressed is quality monitoring and control during the actual building process. Online quality control can significantly increase the robustness of the process by enabling to check the quality of the building process in the earliest possible stage, such that eventually corrective actions can be taken during the process. This is in contrast with on-line and a posteriori quality control which does not allow taking corrective measures if the quality of the part does not meet the desired quality standard. The development of a framework for online quality control of Selective Laser Melting is the subject of this paper. The framework consists of two complementary systems: a system for visual inspection of powder deposition and a system for online and real-time monitoring of the melt pool. A combination of these two systems enables to guarantee the quality of SLM parts with high confidence.
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Feedback control of Selective Laser Melting
Proceedings of the …, 2007Co-Authors: Jean‐pierre Kruth, J Van Vaerenbergh, Peter Mercelis, Jo Van Vaerenbergh, Tom CraeghsAbstract:Selective Laser Melting (SLM) is a powder bed based Rapid Manufacturing (RM) process in which parts are built by Selective Melting of layers of powders by means of a Laser source. The main advantage of this technique is the possibility of making very complex and custom made pieces in a rather fast way. In this paper a feedback control system for Selective Laser Melting is presented. A feedback control system with a high-speed CMOS camera and a photodiode has been installed on the SLM-machine developed at K.U.Leuven-PMA. Both sensors were used independently to keep the melt pool area constant, especially in the case of scanning overhanging structures in which the melt pool would become very large. First motivation for the feedback system and the outline of the feedback system will be described. Next case studies are presented, in which both the photodiode as the CMOS camera have been used to control the SLM - process. Clearly, the feedback control system can improve the surface quality of the lower surface of the overhang.
Lukas Löber - One of the best experts on this subject based on the ideXlab platform.
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Selective Laser Melting of a beta-solidifying TNM-B1 titanium aluminide alloy
Journal of Materials Processing Technology, 2014Co-Authors: Lukas Löber, Frank Peter Schimansky, Uta Kühn, Jürgen Eckert, Lukas Löber, Uta Kühn, Florian Pyczak, Jürgen EckertAbstract:The interest for a wider range of useable materials for the technology of Selective Laser Melting is growing. In this work we describe a new way to optimize the process parameters for Selective Laser Melting of a beta solidifying titanium aluminide. This kind of material has so far not been processed successfully by this method. The new approach is easy to conduct and well transferable to other materials. It is based on the fact that the parts generated from Selective Laser Melting can be described by an addition of multiple single tracks. Multiple types of single track experiments are performed and in combination with knowledge from Laser welding tests optimized parameter combinations are derived. Compact samples are built with the optimized process parameters and characterized in terms of microstructure, phase composition and mechanical properties. With this technique the generation of a TNMB1 titanium aluminide alloy sample with a density greater than 99% could be achieved. The mechanical properties are comparable with material produced by conventional techniques. © 2014 Elsevier B.V.
Lukas Löber - One of the best experts on this subject based on the ideXlab platform.
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Selective Laser Melting of a beta-solidifying TNM-B1 titanium aluminide alloy
Journal of Materials Processing Technology, 2014Co-Authors: Lukas Löber, Frank Peter Schimansky, Uta Kühn, Florian Pyczak, Jürgen EckertAbstract:Abstract The interest for a wider range of useable materials for the technology of Selective Laser Melting is growing. In this work we describe a new way to optimize the process parameters for Selective Laser Melting of a beta solidifying titanium aluminide. This kind of material has so far not been processed successfully by this method. The new approach is easy to conduct and well transferable to other materials. It is based on the fact that the parts generated from Selective Laser Melting can be described by an addition of multiple single tracks. Multiple types of single track experiments are performed and in combination with knowledge from Laser welding tests optimized parameter combinations are derived. Compact samples are built with the optimized process parameters and characterized in terms of microstructure, phase composition and mechanical properties. With this technique the generation of a TNMB1 titanium aluminide alloy sample with a density greater than 99% could be achieved. The mechanical properties are comparable with material produced by conventional techniques.
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Selective Laser Melting of a beta-solidifying TNM-B1 titanium aluminide alloy
Journal of Materials Processing Technology, 2014Co-Authors: Lukas Löber, Frank Peter Schimansky, Uta Kühn, Jürgen Eckert, Lukas Löber, Uta Kühn, Florian Pyczak, Jürgen EckertAbstract:The interest for a wider range of useable materials for the technology of Selective Laser Melting is growing. In this work we describe a new way to optimize the process parameters for Selective Laser Melting of a beta solidifying titanium aluminide. This kind of material has so far not been processed successfully by this method. The new approach is easy to conduct and well transferable to other materials. It is based on the fact that the parts generated from Selective Laser Melting can be described by an addition of multiple single tracks. Multiple types of single track experiments are performed and in combination with knowledge from Laser welding tests optimized parameter combinations are derived. Compact samples are built with the optimized process parameters and characterized in terms of microstructure, phase composition and mechanical properties. With this technique the generation of a TNMB1 titanium aluminide alloy sample with a density greater than 99% could be achieved. The mechanical properties are comparable with material produced by conventional techniques. © 2014 Elsevier B.V.
