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  - 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  - 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  - Gebhardt, Andreas
T1  - Hype um Generative Verfahren. Generative Verfahren zur Herstellung von Kleinserien durchlaufen die Phase eines Booms
JF  - Economic Engineering (2008)
Y1  - 2008
SN  - 1436-3348
SP  - 76
EP  - 79
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
T1  - Härten von Kurbelwellen
Y1  - 1989
N1  - Konferenz-Einzelbericht : Lasertechnik in Nordrhein-Westfalen. Symposium 26.-27.10.1989,  Düsseldorf, D
SP  - 1
EP  - 14
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
A1  - Hötter, Jan-Steffen
A1  - Ziebura, Dawid
T1  - Impact of SLM build parameters on the surface quality
JF  - RTejournal - Forum für Rapid Technologien
Y1  - 2014
SN  - 1614-0923
VL  - 11 (2014)
IS  - 1
SP  - 1
EP  - 14
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  - Gebhardt, Andreas
A1  - Plug, T-K.
T1  - Innovationsschub mittels Rapid-Prototyping, Teil II
JF  - CAD-CAM Report. 14 (1995), H. 9
Y1  - 1995
SN  - 0930-7117
SP  - 78
EP  - 85
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
A1  - Pflug, T-K.
T1  - Innovationsschub mittels Rapid-Prototyping. Teil I
JF  - CAD-CAM Report. 14 (1995), H. 7
Y1  - 1995
SN  - 0930-7117
SP  - 56
EP  - 65
ER  - 
TY  - JOUR
A1  - Gebhardt, Andreas
T1  - Lasereinsatz in der Fertigung der Fahrzeugindustrie. Grundlagen der Anwendung von Lasern zur Materialbearbeitung
Y1  - 1997
N1  - Konferenz-Einzelbericht : Laseranwendungen im Automobilbau, 1. Euroforum-Anwenderkonferenz zum  Lasereinsatz, Nürtingen, DE, 23.-24. Okt, 1997
SP  - 1
EP  - 154
ER  -