TY  - JOUR
A1  - Bucur, Alexandru
A1  - Lazarescu, Lucian
A1  - Pop, Grigore Marian
A1  - Achimas, Gheorghe
A1  - Gebhardt, Andreas
T1  - Tribological performance of biodegradable lubricants under different surface roughness of tools
JF  - Academic Journal of Manufacturing Engineering
Y1  - 2019
SN  - 1583-7904
VL  - 17
IS  - 1
SP  - 172
EP  - 178
ER  - 
TY  - JOUR
A1  - Cosma, Cosmin
A1  - Kessler, Julia
A1  - Gebhardt, Andreas
A1  - Campbell, Ian
A1  - Balc, Nicolae
T1  - Improving the Mechanical Strength of Dental Applications and Lattice Structures SLM Processed
JF  - Materials
N2  - 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.
Y1  - 2020
U6  - http://dx.doi.org/10.3390/ma13040905
SN  - 1996-1944
VL  - 13
IS  - 4
SP  - 1
EP  - 18
PB  - MDPI
CY  - Basel
ER  - 
TY  - JOUR
A1  - Dues, M.
A1  - Gebhardt, Andreas
A1  - Kallweit, Stephan
A1  - Scheffler, T.
A1  - Siekmann, H.
A1  - Uchiyama, T.
T1  - Flow Visualization in a Cavitating Flow
JF  - Proceedings of the German-Japanese Symposium on Multi-Phase Flow : Karlsruhe, Germany, August 23 - 25, 1994 / comp. by U. Müller ...
Y1  - 1994
N1  - German Japanese Symposium on Multi-Phase Flow <1994, Karlsruhe> ; Kernforschungszentrum Karlsruhe ; 5389
SP  - 391
EP  - 402
PB  - Kernforschungszentrum Karlsruhe
CY  - Karlsruhe
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Selective Laser Melting of Soda-Lime Glass Powder
JF  - International Journal of Applied Ceramic Technology
Y1  - 2015
U6  - http://dx.doi.org/10.1111/ijac.12338
SN  - 1744-7402
VL  - 12
IS  - 1
SP  - 53
EP  - 61
PB  - Wiley-Blackwell
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Process Parameters Development of Selective Laser Melting of Lunar Regolith for On-Site Manufacturing Applications
JF  - International Journal of Applied Ceramic Technology
Y1  - 2015
SN  - 1744-7402
U6  - http://dx.doi.org/10.1111/ijac.12326
VL  - 12
IS  - 1
SP  - 46
EP  - 52
PB  - Wiley-Blackwell
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
T1  - Additive manufactured mechanical disentanglement lock
JF  - RTejournal - Forum für Rapid Technologie
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0009-2-42147
SN  - 1614-0923
VL  - 12
PB  - Fachhochschule Aachen
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Gebhardt, Andreas
A1  - Thümmler, Stefan
A1  - Thurn, Laura
T1  - Experimental investigation on selective laser melting of glass
JF  - Physics procedia : 8th International Conference on Laser Assisted Net Shape Engineering LANE 2014
Y1  - 2014
U6  - http://dx.doi.org/10.1016/j.phpro.2014.08.118
SN  - 1875-3892 (E-Journal); 1875-3884 (Print)
VL  - 56 (2014)
SP  - 357
EP  - 364
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Fateri, Miranda
A1  - Hötter, Jan-Steffen
A1  - Gebhardt, Andreas
T1  - Experimental and Theoretical Investigation of Buckling Deformation of Fabricated Objects by Selective Laser Melting
JF  - Physics Procedia
N2  - 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.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.phpro.2012.10.062
SN  - 1875-3892
N1  - Part of special issue "Laser Assisted Net shape Engineering 7 (LANE 2012)"
VL  - 39
SP  - 464
EP  - 470
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Gartzen, Johannes
A1  - Gebhardt, Andreas
A1  - Anger, A.
A1  - Petschke, U.
A1  - Lingens, Hans
T1  - Laserstrahlschweißen mit Schweißdraht von Wärmetauschern mit hohem Wirkungsgrad
JF  - Proceedings : Aachen, Germany, 31st October - 4th November, 1994 / 27th ISATA
Y1  - 1994
SN  - 0-947719-64-4
N1  - Konferenz-Einzelbericht: ISATA, 27. Internat. Symp. on Automotive Technology & Automation
SP  - 397
EP  - 403
PB  - Automotive Automation
CY  - Croydon
ER  - 
TY  - JOUR
A1  - Gartzen, Johannes
A1  - Lingens, Hans
A1  - Schönbohm, J.
A1  - Baumjohann, F.
A1  - Gebhardt, Andreas
T1  - Laserhärten - im Verbund möglich. Forschungsverbund Lasertechnik NRW auf der Suche nach neuen Laseranwendungen
JF  - Technica, Rupperswil. 42 (1993), H. 24
Y1  - 1993
SN  - 0040-866X
SP  - 14
EP  - 18
ER  -