Journal ArticleDOI
Influence of process parameters on surface roughness of aluminum parts produced by DMLS.
TLDR
In this paper, a model based on an L18 orthogonal array of Taguchi design was created to perform experimental planning and the upper surfaces of the samples were analyzed before and after shot peening.Abstract:
Direct metal laser sintering (DMLS) is an additive manufacturing technique for the fabrication of near net-shaped parts directly from computer-aided design data by melting together different layers with the help of a laser source. This paper presents an investigation of the surface roughness of aluminum samples produced by DMLS. A model based on an L18 orthogonal array of Taguchi design was created to perform experimental planning. Some input parameters, namely laser power, scan speed, and hatching distance were selected for the investigation. The upper surfaces of the samples were analyzed before and after shot peening. The morphology was analyzed by means of field emission scanning electron microscope. Scan speed was found to have the greatest influence on the surface roughness. Further, shot peening can effectively reduce the surface roughness.read more
Citations
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Journal ArticleDOI
Influence of Selective Laser Melting Additive Manufacturing Parameters in Inconel 718 Superalloy
Nikolaos Kladovasilakis,P. Charalampous,Konstantinos Tsongas,Ioannis Kostavelis,Dimitrios Tzovaras,Dimitrios Tzetzis +5 more
TL;DR: In this article , the impact of crucial process-related parameters on the final quality of parts constructed with the Inconel 718 superalloy was investigated, and regression-based models were developed in order to interpret the behavior of the AM part's quality depending on the processrelated parameters.
Journal ArticleDOI
An experimental investigation of surface integrity in selective laser melting of Inconel 625
TL;DR: In this article, the authors investigated selective laser melting of Inconel 625 using a wide range of process parameters: four laser powers, five scan speeds, and three hatch spacings.
Proceedings ArticleDOI
Effect of Additive Manufacturing Process Parameters on Turbine Cooling
Jacob C. Snyder,Karen A. Thole +1 more
TL;DR: In this paper, the effect of process parameters on the surface morphology of turbine cooling channels has been investigated, showing that surface roughness increases both heat transfer and pressure loss to similar levels as highly-engineered turbine cooling schemes.
DissertationDOI
A Framework for Optimizing Process Parameters in Powder Bed Fusion (PBF) Process Using Artificial Neural Network (ANN)
TL;DR: This research proposes a framework to optimize the PBF process for 316L stainless steel material, and characterizes the influence of process parameters on the microstructure and mechanical properties of the fabricated part using a series of experiments.
Journal ArticleDOI
On the quality of unsupported overhangs produced by laser powder bed fusion
TL;DR: A specific index has been defined to represent the surface quality of the downward-facing surfaces induced by the laser powder bed fusion (L-PBF) process to validate the quality index.
References
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Book
Laser Material Processing
TL;DR: In this paper, the effect of reflectivity of the surface, when a pure, monochromatic laser (6) is used, is remedied by the simultaneous application of a relatively shorter wavelength beam (1).
Journal ArticleDOI
Selective laser melting of iron-based powder
Jean-Pierre Kruth,Ludo Froyen,J. Van Vaerenbergh,Peter Mercelis,Marleen Rombouts,Bert Lauwers +5 more
TL;DR: In this paper, a mixture of different types of particles (Fe, Ni, Cu and Fe3P) specially developed for selective laser sintering (SLS) is described.
Journal ArticleDOI
Consolidation phenomena in laser and powder-bed based layered manufacturing
TL;DR: In this article, the authors describe which types of laser-induced consolidation can be applied to what type of material, and demonstrate that although SLS/SLM can process polymers, metals, ceramics and composites, quite some limitations and problems cause the palette of applicable materials still to be limited.
BookDOI
Rapid manufacturing : an industrial revolution for the digital age
TL;DR: In this paper, the authors present a discussion of the potential of rapid manufacturing in the automotive industry and present a case study of how to modify a garden fork handle in order to make it more efficient.