@article{ZieburaBremenSchleifenbaumetal.2018, author = {Ziebura, Dawid and Bremen, Sebastian and Schleifenbaum, Johannes Henrich and Gebhardt, Andreas}, title = {Machbarkeitsstudie zur Verarbeitung von nicht rostendem Stahl 1.4404 unter Verwendung einer Diodenlaser-basierten LPBF-Maschine mit kartesischem Achssystem}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {15}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, issn = {1614-0923}, year = {2018}, language = {de} } @article{Gebhardt2001, author = {Gebhardt, Andreas}, title = {Laserwelding with fillerwire}, series = {LIA handbook of laser material processing / Laser Institute of America}, journal = {LIA handbook of laser material processing / Laser Institute of America}, address = {Orlando, Florida}, isbn = {3-540-41770-2}, year = {2001}, language = {en} } @article{GartzenGebhardtAngeretal.1994, author = {Gartzen, Johannes and Gebhardt, Andreas and Anger, A. and Petschke, U. and Lingens, Hans}, title = {Laserstrahlschweißen mit Schweißdraht von W{\"a}rmetauschern mit hohem Wirkungsgrad}, series = {Proceedings : Aachen, Germany, 31st October - 4th November, 1994 / 27th ISATA}, journal = {Proceedings : Aachen, Germany, 31st October - 4th November, 1994 / 27th ISATA}, publisher = {Automotive Automation}, address = {Croydon}, isbn = {0-947719-64-4}, pages = {397 -- 403}, year = {1994}, language = {de} } @article{GartzenLingensSchoenbohmetal.1993, author = {Gartzen, Johannes and Lingens, Hans and Sch{\"o}nbohm, J. and Baumjohann, F. and Gebhardt, Andreas}, title = {Laserh{\"a}rten - im Verbund m{\"o}glich. Forschungsverbund Lasertechnik NRW auf der Suche nach neuen Laseranwendungen}, series = {Technica, Rupperswil. 42 (1993), H. 24}, journal = {Technica, Rupperswil. 42 (1993), H. 24}, isbn = {0040-866X}, pages = {14 -- 18}, year = {1993}, language = {de} } @article{Gebhardt1997, author = {Gebhardt, Andreas}, title = {Lasereinsatz in der Fertigung der Fahrzeugindustrie. Grundlagen der Anwendung von Lasern zur Materialbearbeitung}, pages = {1 -- 154}, year = {1997}, language = {de} } @article{GebhardtPflug1995, author = {Gebhardt, Andreas and Pflug, T-K.}, title = {Innovationsschub mittels Rapid-Prototyping. Teil I}, series = {CAD-CAM Report. 14 (1995), H. 7}, journal = {CAD-CAM Report. 14 (1995), H. 7}, isbn = {0930-7117}, pages = {56 -- 65}, year = {1995}, language = {de} } @article{GebhardtPlug1995, author = {Gebhardt, Andreas and Plug, T-K.}, title = {Innovationsschub mittels Rapid-Prototyping, Teil II}, series = {CAD-CAM Report. 14 (1995), H. 9}, journal = {CAD-CAM Report. 14 (1995), H. 9}, isbn = {0930-7117}, pages = {78 -- 85}, year = {1995}, language = {de} } @article{CosmaKesslerGebhardtetal.2020, author = {Cosma, Cosmin and Kessler, Julia and Gebhardt, Andreas and Campbell, Ian and Balc, Nicolae}, title = {Improving the Mechanical Strength of Dental Applications and Lattice Structures SLM Processed}, series = {Materials}, volume = {13}, journal = {Materials}, number = {4}, publisher = {MDPI}, address = {Basel}, issn = {1996-1944}, doi = {10.3390/ma13040905}, pages = {1 -- 18}, year = {2020}, abstract = {To manufacture custom medical parts or scaffolds with reduced defects and high mechanical characteristics, new research on optimizing the selective laser melting (SLM) parameters are needed. In this work, a biocompatible powder, 316L stainless steel, is characterized to understand the particle size, distribution, shape and flowability. Examination revealed that the 316L particles are smooth, nearly spherical, their mean diameter is 39.09 μm and just 10\% of them hold a diameter less than 21.18 μm. SLM parameters under consideration include laser power up to 200 W, 250-1500 mm/s scanning speed, 80 μm hatch spacing, 35 μm layer thickness and a preheated platform. The effect of these on processability is evaluated. More than 100 samples are SLM-manufactured with different process parameters. The tensile results show that is possible to raise the ultimate tensile strength up to 840 MPa, adapting the SLM parameters for a stable processability, avoiding the technological defects caused by residual stress. Correlating with other recent studies on SLM technology, the tensile strength is 20\% improved. To validate the SLM parameters and conditions established, complex bioengineering applications such as dental bridges and macro-porous grafts are SLM-processed, demonstrating the potential to manufacture medical products with increased mechanical resistance made of 316L.}, language = {en} } @article{GebhardtHoetterZiebura2014, author = {Gebhardt, Andreas and H{\"o}tter, Jan-Steffen and Ziebura, Dawid}, title = {Impact of SLM build parameters on the surface quality}, series = {RTejournal - Forum f{\"u}r Rapid Technologien}, volume = {11 (2014)}, journal = {RTejournal - Forum f{\"u}r Rapid Technologien}, number = {1}, issn = {1614-0923}, pages = {1 -- 14}, year = {2014}, language = {de} } @article{Gebhardt1989, author = {Gebhardt, Andreas}, title = {H{\"a}rten von Kurbelwellen}, pages = {1 -- 14}, year = {1989}, language = {de} } @article{Gebhardt2008, author = {Gebhardt, Andreas}, title = {Hype um Generative Verfahren. Generative Verfahren zur Herstellung von Kleinserien durchlaufen die Phase eines Booms}, series = {Economic Engineering (2008)}, journal = {Economic Engineering (2008)}, isbn = {1436-3348}, pages = {76 -- 79}, year = {2008}, language = {de} } @article{Gebhardt2004, author = {Gebhardt, Andreas}, title = {Grundlagen des Rapid Prototyping: Eine Kurzdarstellung der Rapid Prototyping Verfahren}, year = {2004}, abstract = {Generative Verfahren sind seit etwa 1987 in den USA und seit etwa 1990 in Europa und Deutschland in Form von Rapid Prototyping Verfahren bekannt und haben sich in dieser Zeit von eher als exotisch anzusehenden Modellbauverfahren zu effizienten Werkzeugen f{\"u}r die Beschleunigung der Produktentstehung gewandelt. Mit der Weiterentwicklung der Verfahren und insbesondere der Materialien wird mehr und mehr das Feld der direkten Anwendung der Rapid Technologie zur Fertigung erschlossen. Rapid Technologien werden daher zum Schl{\"u}ssel f{\"u}r neue Konstruktionssystematiken und Fertigungsstrategien.}, subject = {Rapid prototyping}, language = {de} } @article{Gebhardt2006, author = {Gebhardt, Andreas}, title = {Generative Manufacturing of Ceramic Parts "Vision Rapid Prototyping"}, year = {2006}, abstract = {Table of Contents Introduction 1. Generative Manufacturing Processes 2. Classification of Generative Manufacturing Processes 3. Application of Generative Processes on the Fabrication of Ceramic Parts 3.1 Extrusion 3.2 3D-Printing 3.3 Sintering - Laser Sintering 3.4 Layer-Laminate Processes 3.5 Stereolithography (sometimes written: Stereo Lithography) 4. Layer Milling 5. Conclusion - Vision}, subject = {Rapid prototyping}, language = {en} } @article{DuesGebhardtKallweitetal.1994, author = {Dues, M. and Gebhardt, Andreas and Kallweit, Stephan and Scheffler, T. and Siekmann, H. and Uchiyama, T.}, title = {Flow Visualization in a Cavitating Flow}, series = {Proceedings of the German-Japanese Symposium on Multi-Phase Flow : Karlsruhe, Germany, August 23 - 25, 1994 / comp. by U. M{\"u}ller ...}, journal = {Proceedings of the German-Japanese Symposium on Multi-Phase Flow : Karlsruhe, Germany, August 23 - 25, 1994 / comp. by U. M{\"u}ller ...}, publisher = {Kernforschungszentrum Karlsruhe}, address = {Karlsruhe}, pages = {391 -- 402}, year = {1994}, language = {en} } @article{FateriGebhardtThuemmleretal.2014, author = {Fateri, Miranda and Gebhardt, Andreas and Th{\"u}mmler, Stefan and Thurn, Laura}, title = {Experimental investigation on selective laser melting of glass}, series = {Physics procedia : 8th International Conference on Laser Assisted Net Shape Engineering LANE 2014}, volume = {56 (2014)}, journal = {Physics procedia : 8th International Conference on Laser Assisted Net Shape Engineering LANE 2014}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1875-3892 (E-Journal); 1875-3884 (Print)}, doi = {10.1016/j.phpro.2014.08.118}, pages = {357 -- 364}, year = {2014}, language = {en} } @article{FateriHoetterGebhardt2012, author = {Fateri, Miranda and H{\"o}tter, Jan-Steffen and Gebhardt, Andreas}, title = {Experimental and Theoretical Investigation of Buckling Deformation of Fabricated Objects by Selective Laser Melting}, series = {Physics Procedia}, volume = {39}, journal = {Physics Procedia}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1875-3892}, doi = {10.1016/j.phpro.2012.10.062}, pages = {464 -- 470}, year = {2012}, abstract = {Although Selective Laser Melting (SLM) process is an innovative manufacturing method, there are challenges such as inferior mechanical properties of fabricated objects. Regarding this, buckling deformation which is caused by thermal stress is one of the undesired mechanical properties which must be alleviated. As buckling deformation is more observable in hard to process materials, silver is selected to be studied theoretically and experimentally for this paper. Different scanning strategies are utilized and a Finite Element Method (FEM) is applied to calculate the temperature gradient in order to determine its effect on the buckling deformation of the objects from experiments.}, language = {en} } @article{Gebhardt2001, author = {Gebhardt, Andreas}, title = {Entwicklungstendenzen und neue Systeme im Rapid Prototyping}, series = {Industrie Management. 17 (2001), H. 3}, journal = {Industrie Management. 17 (2001), H. 3}, isbn = {1434-1980}, pages = {42 -- 46}, year = {2001}, language = {de} } @article{GebhardtBackeskrameretal.1995, author = {Gebhardt, Andreas and Backes, G. and kramer, T. and Kreutz, E.-W. (u.a.)}, title = {Beschichten von Kurbelzapfen mit CO2-Laserstrahlung. Energietechnik}, series = {Maschinenmarkt. 101 (1995), H. 12}, journal = {Maschinenmarkt. 101 (1995), H. 12}, isbn = {0341-5775}, pages = {42 -- 45}, year = {1995}, language = {de} } @article{KesslerBalcGebhardtetal.2015, author = {Kessler, Julia and Balc, Nicolae and Gebhardt, Andreas and Abbas, Karim}, title = {Basic Research on Lattice Structures Focused on the Tensile Strength}, series = {Applied Mechanics and Materials}, volume = {Vol. 808}, journal = {Applied Mechanics and Materials}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, issn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.808.193}, pages = {193 -- 198}, year = {2015}, language = {en} } @article{GebhardtMathar1994, author = {Gebhardt, Andreas and Mathar, W.}, title = {Auftragsabwicklung und branchenspezifische Anforderungen an SFM-Modelle -am Beispiel medizinischer Modelle}, pages = {188 -- 191}, year = {1994}, language = {de} }