scholarly journals Simulation of the Laser Beam Melting Process – Approaches for an Efficient Modelling of the Beam-material Interaction

Procedia CIRP ◽  
2014 ◽  
Vol 25 ◽  
pp. 146-153 ◽  
Author(s):  
C. Seidel ◽  
M.F. Zaeh ◽  
M. Wunderer ◽  
J. Weirather ◽  
T.A. Krol ◽  
...  
2019 ◽  
Vol 45 ◽  
pp. 455-459 ◽  
Author(s):  
Hyung Giun Kim ◽  
Won Rae Kim ◽  
Ohyung Kwon ◽  
Gyung Bae Bang ◽  
Min Ji Ham ◽  
...  

2017 ◽  
Vol 107 (11-12) ◽  
pp. 818-823
Author(s):  
N. Eschner ◽  
J. Lingenhöhl ◽  
S. Öppling ◽  
G. Prof. Lanza

Gegenwärtig ist bei der additiven Fertigung eine prozessbegleitende Überwachung des Bauteils auf das Schmelzbad und oberflächennahe Bereiche limitiert. Mithilfe akustischer Signale lassen sich typische Defekte, die im Rahmen des LBM (laser beam melting – Laserstrahlschmelzen)-Verfahrens auftreten, detektieren. Dies umfasst neben Porosität und Rissen auch Eigenspannungen. In diesem Fachbeitrag werden die Möglichkeit eines in den LBM-Prozess integrierten akustischen Prüfsystems sowie alternative Sensorkonzepte diskutiert und evaluiert.   Current process monitoring techniques for additive manufacturing are limited to the melt pool and near-surface areas. Typical defects that occur within the LBM-process, such as porosity and cracks, as well as residual stress, can be detected by using acoustic waves. In this article, the possibility of an integrated ultrasonic inspection system, as well as various sensor concepts are discussed and evaluated.


2014 ◽  
Vol 56 ◽  
pp. 390-399 ◽  
Author(s):  
Alexander Ilin ◽  
Ruslan Logvinov ◽  
Alexander Kulikov ◽  
Andrey Prihodovsky ◽  
Hongxiao Xu ◽  
...  

Author(s):  
Alexis Queva ◽  
Yaasin Mayi ◽  
Michel Bellet ◽  
Gildas Guillemot ◽  
Patrice Peyre ◽  
...  

Author(s):  
F.-K. Benra ◽  
H. J. Dohmen ◽  
S. Clauss ◽  
J. T. Sehrt ◽  
G. Witt

The characteristic additive build-up at the laser beam melting technology provides the opportunity to freeform porous and defined structures at specific areas in one part. By adjusting the process parameters specific characteristics of the manufactured part such as density, permeability, pore size, porosity and shear strength can be realized. The manufacturing process of a test body is described in detail. The permeability of the manufactured parts is investigated experimentally. In addition a numerical model is build and the flow structure inside of the test body is illustrated. The numerically obtained results are compared to the experimentally obtained results. To show the advantages of this technology for future applications a numerical model of a porous blade surrounded by a hot gas flow and cooled from inside of the porous structure is investigated. The results show that the method to define the characteristics during the laser beam melting process has to be optimized.


Author(s):  
Q. Chen ◽  
L. Moniz Da Silva Sancho ◽  
G. Guillemot ◽  
Ch.-A. Gandin ◽  
M. Bellet ◽  
...  

2019 ◽  
Vol 78 (7) ◽  
pp. 2377-2394 ◽  
Author(s):  
Johannes Weirather ◽  
Vladyslav Rozov ◽  
Mario Wille ◽  
Paul Schuler ◽  
Christian Seidel ◽  
...  

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