@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{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{Gebhardt1999, author = {Gebhardt, Andreas}, title = {Schnell und flexibel zur Kleinserie. Effizienzsteigerung bei der Realisierung von Komponenten und Teilsystemen}, series = {Ingenieur-Werkstoffe. 8 (1999), H. 3}, journal = {Ingenieur-Werkstoffe. 8 (1999), H. 3}, isbn = {0935-5715}, pages = {8 -- 14}, year = {1999}, language = {de} } @article{Gebhardt1999, author = {Gebhardt, Andreas}, title = {Marktentwicklung im Rapid Prototyping}, series = {Kunststoffe, M{\"u}nchen. 89 (1999), H. 11}, journal = {Kunststoffe, M{\"u}nchen. 89 (1999), H. 11}, isbn = {0023-5563}, pages = {50 -- 55}, year = {1999}, language = {de} } @article{Gebhardt2000, author = {Gebhardt, Andreas}, title = {Materialfrage f{\"u}hrt h{\"a}ufig zu Trugschl{\"u}ssen. Wunsch und Wirklichkeit im Rapid Prototyping - Teil 2}, series = {Industrieanzeiger. 122 (2000), H. 4}, journal = {Industrieanzeiger. 122 (2000), H. 4}, isbn = {0019-9036}, pages = {41 -- 41}, year = {2000}, language = {de} } @article{Gebhardt1998, author = {Gebhardt, Andreas}, title = {Rapid Tooling. Der schnelle Weg zum Spritzgießwerkzeug.}, series = {Kunststoffe, M{\"u}nchen. 88 (1998), H. 11}, journal = {Kunststoffe, M{\"u}nchen. 88 (1998), H. 11}, isbn = {0023-5563}, pages = {1992 -- 2000}, year = {1998}, language = {de} } @article{Gebhardt1989, author = {Gebhardt, Andreas}, title = {H{\"a}rten von Kurbelwellen}, pages = {1 -- 14}, year = {1989}, language = {de} } @article{GebhardtGuntermannHaeming1997, author = {Gebhardt, Andreas and Guntermann, P. and H{\"a}ming, L.}, title = {Schweißen mit dem Nd:YAG-Laser}, series = {Der Praktiker, Schweißen und Schneiden. 49 (1997), H. 4}, journal = {Der Praktiker, Schweißen und Schneiden. 49 (1997), H. 4}, isbn = {0554-9965}, pages = {170 -- 172}, year = {1997}, language = {de} } @article{Gebhardt2004, author = {Gebhardt, Andreas}, title = {Rapid Prototyping}, series = {Landolt-B{\"o}rnstein - Group VIII Advanced Materials and Technologies‡Vol. 1 Laser Physics and Applications‡Subvol. C Laser Applications / authors: B{\"a}uerle, D. ...}, journal = {Landolt-B{\"o}rnstein - Group VIII Advanced Materials and Technologies‡Vol. 1 Laser Physics and Applications‡Subvol. C Laser Applications / authors: B{\"a}uerle, D. ...}, publisher = {Heidelberg}, address = {Springer}, isbn = {3-540-00105-0}, pages = {105 -- 123}, year = {2004}, language = {en} } @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{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{GebhardtSchmidtHoetteretal.2010, author = {Gebhardt, Andreas and Schmidt, Frank-Michael and H{\"o}tter, Jan-Steffen and Sokalla, Wolfgang and Sokalla, Patrick}, title = {Additive Manufacturing by selective laser melting the realizer desktop machine and its application for the dental industry}, series = {Physics Procedia}, volume = {5}, journal = {Physics Procedia}, number = {2}, isbn = {1875-3892}, pages = {543 -- 549}, year = {2010}, 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{GebhardtFateri2013, author = {Gebhardt, Andreas and Fateri, Miranda}, title = {3D printing and its applications}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {10}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, number = {1}, publisher = {Fachhochschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-35626}, year = {2013}, abstract = {Eine zunehmende Anzahl von Artikeln in Publikumszeitschriften und Journalen r{\"u}ckt die direkte Herstellung von Bauteilen und Figuren immer mehr in das Bewusstsein einer breiten {\"O}ffentlichkeit. Leider ergibt sich nur selten ein einigermaßen vollst{\"a}ndiges Bild davon, wie und in welchen Lebensbereichen diese Techniken unseren Alltag ver{\"a}ndern werden. Das liegt auch daran, dass die meisten Artikel sehr technisch gepr{\"a}gt sind und sich nur punktuell auf Beispiele st{\"u}tzen. Dieser Beitrag geht von den Bed{\"u}rfnissen der Menschen aus, wie sie z.B. in der Maslow'schen Bed{\"u}rfnispyramide strukturiert dargestellt sind und unterstreicht dadurch, dass 3D Printing (oder Additive Manufacturing resp. Rapid Prototyping) bereits alle Lebensbereiche erfasst hat und im Begriff ist, viele davon zu revolutionieren.}, language = {en} } @article{HoetterFateriGebhardt2012, author = {H{\"o}tter, Jan-Steffen and Fateri, Miranda and Gebhardt, Andreas}, title = {Prozessoptimierung des SLM-Prozesses mit hoch-reflektiven und thermisch sehr gut leitenden Materialien durch systematische Parameterfindung und begleitende Simulationen am Beispiel von Silber}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {9}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, number = {1}, publisher = {Fachhoschule Aachen}, address = {Aachen}, issn = {1614-0923}, url = {http://nbn-resolving.de/urn:nbn:de:0009-2-33639}, pages = {1 -- 14}, year = {2012}, abstract = {Additive Manufacturing durch Aufschmelzen von Metallpulvern hat sich auf breiter Front als Herstellverfahren, auch f{\"u}r Endprodukte, etabliert. Besonders f{\"u}r die Variante des Selective Laser Melting (SLM) sind Anwendungen in der Zahntechnik bereits weit verbreitet und der Einsatz in sensitiven Branchen wie der Luftfahrt ist in greifbare N{\"a}he ger{\"u}ckt. Deshalb werden auch vermehrt Anstrengungen unternommen, um bisher nicht verarbeitete Materialien zu qualifizieren. Dies sind vorzugsweise Nicht-Eisen- und Edelmetalle, die sowohl eine sehr hohe Reflektivit{\"a}t als auch eine sehr gute W{\"a}rmeleitf{\"a}higkeit aufweisen - beides Eigenschaften, die die Beherrschung des Laser-Schmelzprozesses erschweren und nur kleine Prozessfenster zulassen. Die Arbeitsgruppe SLM des Lehr- und Forschungsgebietes Hochleistungsverfahren der Fertigungstechnik hat sich unter der Randbedingung einer kleinen und mit geringer Laserleistung ausgestatteten SLM Maschine der Aufgabe gewidmet und am Beispiel von Silber die Parameterfelder f{\"u}r Einzelspuren und wenig komplexe Geometrien systematisch untersucht. Die Arbeiten wurden von FEM Simulationen begleitet und durch metallographische Untersuchungen verifiziert. Die Ergebnisse bilden die Grundlage zur schnellen Parameterfindung bei komplexen Geometrien und bei Ver{\"a}nderungen der Zusammensetzung, wie sie bei zuk{\"u}nftigen Legierungen zu erwarten sind. Die Ergebnisse werden exemplarisch auf unterschiedliche Geometrien angewandt und entsprechende Bauteile gezeigt.}, language = {de} } @article{HoetterFateriGebhardt2012, author = {H{\"o}tter, Jan-Steffen and Fateri, Miranda and Gebhardt, Andreas}, title = {Selective laser melting of metals: desktop machines open up new chances even for small companies}, series = {Advanced materials research}, volume = {622-623}, journal = {Advanced materials research}, publisher = {Trans Tech Publ.}, address = {Baech}, issn = {1662-8985 (E-Journal); 1022-6680 (Print)}, doi = {10.4028/www.scientific.net/AMR.622-623.461}, pages = {461 -- 465}, year = {2012}, abstract = {Additive manufacturing (AM) of metal parts by using Selective Laser Melting (SLM) has become a powerful tool mostly in the area of automotive, aerospace engineering and others. Especially in the field of dentistry, jewelry and related branches that require individualized or even one-of-a-kind products, the direct digital manufacturing process opens up new ways of design and manufacturing. In these fields, mostly small and medium sized businesses (SME) are operating which do not have sufficient human and economic resources to invest in this technology. But to stay competitive, the application of AM can be regarded as a necessity. In this situation a new desktop machine (Realizer SLM 50) was introduced that cost about 1/3 of a shop floor SLM machine and promises small quality parts. To find out whether the machine really is an alternative for SMEs the University of Applied Science, Aachen, Germany, designed, build and optimized typical parts from the dentistry and the jewelry branches using CoCr and silver material, the latter being new with this application. The paper describes the SLM procedure and how to find and optimize the most important parameters. The test is accompanied by digital simulation in order to verify the build parameters and to plan future builds. The procedure is shown as well as the resulting parts made from CoCr and silver material.}, language = {en} } @article{GebhardtFateri2014, author = {Gebhardt, Andreas and Fateri, Miranda}, title = {3D-Drucken und die Anwendungen}, series = {RTejournal - Forum f{\"u}r Rapid Technologie}, volume = {11 (2014)}, journal = {RTejournal - Forum f{\"u}r Rapid Technologie}, number = {1}, issn = {1614-0923}, pages = {1 -- 9}, year = {2014}, language = {de} } @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{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{FateriGebhardt2015, author = {Fateri, Miranda and Gebhardt, Andreas}, title = {Selective Laser Melting of Soda-Lime Glass Powder}, series = {International Journal of Applied Ceramic Technology}, volume = {12}, journal = {International Journal of Applied Ceramic Technology}, number = {1}, publisher = {Wiley-Blackwell}, address = {Oxford}, issn = {1744-7402}, doi = {10.1111/ijac.12338}, pages = {53 -- 61}, year = {2015}, language = {en} }