scholarly journals A Simulation Model for Direct Selective Laser Sintering of Metal Powders

2009 ◽  
Author(s):  
X.C. Wang ◽  
J.P. Kruth
Keyword(s):  
Simulation Model ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Metal Powders

Evolution of Direct Selective Laser Sintering of Metals

2011 ◽  
Vol 383-390 ◽  
pp. 6252-6257
Author(s):  
Francesco Cardaropoli ◽  
Fabrizia Caiazzo ◽  
Vincenzo Sergi
Keyword(s):  
Complex Geometry ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Layer By Layer ◽  
Metal Powders ◽  
Additive Process ◽  
Operator Experience ◽  
Critical Phases ◽  
Time Required

Direct Metal Selective Laser Sintering (DMSLS) is a layer-by-layer additive process for metal powders, which allows quick production of complex geometry parts. The aim of this study is to analyse the improvement of DMSLS with “EOSINT M270”, the new laser sintering machine developed by EOS. Tests were made on sintered parts of Direct Metal 20 (DM20), a bronze based powder with a mean grain dimension of 20 μm. Different properties and accuracy were evaluated for samples manufactured with three different exposure strategies. Besides mechanical properties, the manufacturing process was also examined in order to evaluate its characteristics. The quality of laser sintered parts is too affected by operator experience and skill. Furthermore, critical phases are not automatic and this causes an extension of time required for the production. Due to these limitations, DMSLS can be used for Rapid Manufacturing, but it is especially suitable to few sample series.

Three-Dimensional Modeling of Selective Laser Sintering of Two-Component Metal Powder Layers

2005 ◽  
Vol 128 (1) ◽  
pp. 299-306 ◽  
Author(s):  
Tiebing Chen ◽  
Yuwen Zhang
Keyword(s):  
Metal Powder ◽  
Continuous Wave ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Powder Layer ◽  
Metal Powders ◽  
Gaussian Laser Beam ◽  
Scanning Velocity ◽  
Three Dimensional Modeling

Laser sintering of a metal powder mixture that contains two kinds of metal powders with significantly different melting points under a moving Gaussian laser beam is investigated numerically. The continuous-wave laser-induced melting accompanied by shrinkage and resolidification of the metal powder layer are modeled using a temperature-transforming model. The liquid flow of the melted low-melting-point metal driven by capillary and gravity forces is also included in the physical model. The numerical results are validated by experimental results, and a detailed parametric study is performed. The effects of the moving heat source intensity, the scanning velocity, and the thickness of the powder layer on the sintering depth, the configuration of the heat affected zone, and the temperature distribution are discussed.

Selective laser sintering and cladding of single‐component metal powders

2004 ◽  
Vol 10 (2) ◽  
pp. 88-97 ◽  
Author(s):  
Nikolay K. Tolochko ◽  
Sergei E. Mozzharov ◽  
Igor A. Yadroitsev ◽  
Tahar Laoui ◽  
Ludo Froyen ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Single Component ◽  
Metal Powders

Particularly Selective Sintering of Metal Powders by Pulsed Laser Radiation

2016 ◽  
Vol 685 ◽  
pp. 403-407 ◽  
Author(s):  
V.G. Smelov ◽  
A.V. Sotov ◽  
Serguei P. Murzin
Keyword(s):  
Laser Radiation ◽  
Metal Powder ◽  
Development Process ◽  
Selective Laser Sintering ◽  
Pulsed Laser ◽  
Laser Sintering ◽  
Material Structure ◽  
Metal Powders ◽  
Pulsed Laser Radiation ◽  
Fine Powders

In this article, selective laser sintering of fine metal powder of pure Ni with the size fractions 56 ... 80 microns was conducted. Algorithm development process of laser sintering of fine powders was created, allowing to obtain defect-free samples. Investigation of the material structure of obtained samples was carried out.

A model for the interaction of near-infrared laser pulses with metal powders in selective laser sintering

2002 ◽  
Vol 74 (4) ◽  
pp. 467-474 ◽  
Author(s):  
P. Fischer ◽  
N. Karapatis ◽  
V. Romano ◽  
R. Glardon ◽  
H.P. Weber
Keyword(s):  
Near Infrared ◽  
Selective Laser Sintering ◽  
Laser Pulses ◽  
Laser Sintering ◽  
Infrared Laser ◽  
Metal Powders

scholarly journals Compatibility of the digital design of prosthetic crowns with restorations made in the technology of selective laser sintering of metal powders

2020 ◽  
Vol 70 (2) ◽  
pp. 132-143
Author(s):  
Daniel Surowiecki ◽  
Marcin Szerszeń ◽  
Kamila Wróbel-Bednarz ◽  
Agata Walczyk
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Digital Design ◽  
Metal Powders ◽  
Made In

Direct Laser Sintering of metal parts: characterisation and evaluation of joining mechanisms

2004 ◽  
Vol 860 ◽  
Author(s):  
E. Bassoli ◽  
A. Gatto ◽  
L. Iuliano ◽  
E. Atzeni
Keyword(s):  
Selective Laser Sintering ◽  
Tensile Tests ◽  
Laser Sintering ◽  
Experimental Methodology ◽  
Metal Powders ◽  
Direct Laser ◽  
Powder Deposition ◽  
Mechanical Performances ◽  
Plastic Parts ◽  
Market Solutions

ABSTRACTRapid Prototyping and Tooling are playing a more and more important role in the achievement of compressed time-to-market solutions, where prototype parts and tools are produced directly from the CAD model. In particular, Selective Laser Sintering (SLS) of metal powders with liquid phase is frequently applied for the production of inserts for injection moulding of plastic parts.An experimental campaign has been planned to investigate the surface finish and mechanical performances of Direct Laser Sintering technique, with particular regard to the effect of the laser sintering strategy on the anisotropy of the final part. Tensile specimens of DirectMetal 20 and DirectSteel 20 materials have been produced, with different orientations in regard to laser path.Rupture surfaces after the tensile tests were observed at the SEM, in order to understand failure mechanisms, whereas the observation of polished sections helped investigating joining phenomena between the particles. The proposed experimental methodology allowed correlating the macroscopic performances to the micro-mechanisms ruling the process, proving that no considerable differences can be noticed between samples produced in the X and Y direction within the plane of powder deposition.

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