@misc{GruegerJenschDittrichetal., author = {Gr{\"u}ger, Lennart and Jensch, Felix and Dittrich, Fabian and H{\"a}rtel, Sebastian}, title = {On the creation of a material bond between L-PBF-manufactured AZ91 and Ti-6Al-4V components in the context of medical applications}, series = {Materials}, volume = {17}, journal = {Materials}, number = {18}, publisher = {MDPI AG}, issn = {1996-1944}, doi = {10.3390/ma17184667}, abstract = {Within the scope of these investigations, the feasibility of a material bond between Ti-6Al-4V and the magnesium alloy AZ91 is analyzed. Ti-6Al-4V is frequently used for implants due to its biocompatibility, corrosion resistance, and specific strength. However, depending on the surface quality, the attachment behavior of the bone to the implant varies. Magnesium implants promote the regeneration of bone tissue and biodegrade as the bone tissue heals. Combining the properties of both materials in one implant enables a reduced implant volume and increased stability. For this reason, this study aims to demonstrate the feasibility of creating a material bond between the materials Ti-6Al-4V and AZ91. For this purpose, Ti-6Al-4V truncated cones and AZ91 sleeves were produced using the additive manufacturing process of laser powder bed fusion (L-PBF). The as-built sleeves were then pressed onto machined truncated cones. Since zinc serves as a lubricant and has good diffusion properties with the materials used as a result of heat treatment, a comparison was made between zinc-coated and the as-built Ti-6Al-4V samples. This showed that a bond was created after hot isostatic pressing and that the push-out force could be increased by more than 4.5 times. Consequently, a proof of feasibility was demonstrated, and a high potential for applications in medical technology was shown.}, language = {en} } @misc{GruegerHaertelSahin, author = {Gr{\"u}ger, Lennart and H{\"a}rtel, Sebastian and Sahin, Emre}, title = {Simulierte Produktionsumgebung heute - Evaluation der numerischen Prozesssimulation des selektiven Laserschmelzens}, series = {Industry 4.0 Science}, volume = {2024}, journal = {Industry 4.0 Science}, number = {4}, publisher = {GITO mbH Verlag}, issn = {2942-6154}, doi = {10.30844/I4SD.24.4.70}, pages = {70 -- 77}, language = {de} } @incollection{GruegerFischerKorbetal., author = {Gr{\"u}ger, Lennart and Fischer, Tim Sebastian and Korb, Elisa and H{\"a}rtel, Sebastian}, title = {Vergleichende Prozesskettenuntersuchung der konventionellen und additiven Fertigung eines Demonstratorbauteils unter umwelttechnischen Aspekten}, series = {Rethinking Quality - Wandel des Qualit{\"a}tsmanagements durch Digitalisierung und K{\"u}nstliche Intelligenz : Bericht zur GQW-Jahrestagung 2024 in Berlin}, booktitle = {Rethinking Quality - Wandel des Qualit{\"a}tsmanagements durch Digitalisierung und K{\"u}nstliche Intelligenz : Bericht zur GQW-Jahrestagung 2024 in Berlin}, editor = {Jochem, Roland and Maurice, Meyer}, publisher = {Springer Fachmedien Wiesbaden}, address = {Wiesbaden}, isbn = {978-3-658-47212-2}, doi = {https://doi.org/10.1007/978-3-658-47213-9_7}, pages = {123 -- 142}, abstract = {Nachhaltigkeit ist branchen{\"u}bergreifend ein relevantes Thema. H{\"a}ufig werden zu umwelttechnischen Untersuchungen jedoch nur einzelne Schritte der Fertigung eines Produktes und nicht die gesamte Prozesskette betrachtet. Der vorliegende Artikel liefert einen Vergleich von konventionellen und additiven Fertigungsverfahren anhand eines Demonstratorbauteils unter umwelttechnischen Gesichtspunkten. Zu diesem Zweck werden die Wertsch{\"o}pfungsketten der additiven Fertigungsverfahren des Laser Powder Bed Fusion und der Wire Arc Direct Energy Deposition mit einer konventionellen Fertigungsprozesskette verglichen. Hierbei kommen Energieverbrauch, CO2-Ausstoß und Abfallaufkommen als wesentliche Vergleichskriterien zur Anwendung. Im Ergebnis sind die additiven Fertigungsverfahren f{\"u}r das Demonstratorbauteil, in Bezug auf die genannten Kriterien als nachhaltiger zu bewerten. Der Artikel erhebt keinen Anspruch auf vollst{\"a}ndige {\"U}bertragbarkeit, pr{\"a}sentiert jedoch einen Ansatz zur Analyse der Bauteilnachhaltigkeit {\"u}ber die gesamte Wertsch{\"o}pfungskette.}, language = {de} } @misc{GruegerSzyndlerJenschetal., author = {Gr{\"u}ger, Lennart and Szyndler, Joanna and Jensch, Felix and H{\"a}rtel, Sebastian}, title = {Porosity analysis of L-PBF manufactured AZ91D components}, series = {Materials research proceedings}, volume = {54}, journal = {Materials research proceedings}, publisher = {Materials Research Forum LLC}, address = {Millersville, PA}, isbn = {978-1-64490-359-9}, issn = {2474-395X}, doi = {10.21741/9781644903599-22}, pages = {199 -- 208}, abstract = {Several materials for joint replacement parts approved in medical technology are being investigated. Magnesium alloys are very suitable for implants due to the similar strength properties between magnesium alloys and human bone. Therefore, the present work aims to examine the parameters for producing the magnesium alloy AZ91D. For this purpose, 16 samples were manufactured with varying laser power and exposure speed and examined using µCT analyses. As a result, densities between 99.56 and 95.21 percent were achieved. The samples with the lowest density were subjected to a HIP process to increase the relative density. However, a further µCT analysis revealed only minor positive effects of the HIP process. An analysis of the number and size of the pores indicates that the pores bonded together instead of being closed.}, language = {en} }