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
Evaluation of Additively Manufactured Microchannel Heat Sinks
TL;DR: In this article, direct metal laser sintering was used to produce both straight and manifold microchannel designs with hydraulic diameters of $500~\mu \text{m}$ in an aluminum alloy (AlSi10Mg).
Journal ArticleDOI
Manufacturing of a high-temperature resistojet heat exchanger by selective laser melting
TL;DR: In this article, a high-temperature spacecraft resistojet heat exchanger with a single converging-diverging nozzle is designed and analyzed using high-resolution micro-computed tomography (CT) for volumetric inspection and conformity.
Journal ArticleDOI
On incorporating scanning strategy effects into the modified inherent strain modeling framework for laser powder bed fusion
TL;DR: In this paper, the effects of different laser scanning strategies are incorporated into the modified inherent strain modeling (MISM) framework for the first time to enable accurate simulation for residual deformation of the L-PBF metal parts.
Journal ArticleDOI
Microstructural investigation of as-fabricated and heat-treated Inconel 625 and Inconel 718 fabricated by direct metal laser sintering: contribution of Politecnico di Torino and Istituto Italiano di Tecnologia (IIT) di Torino
Giulio Marchese,Emilio Bassini,Michele Calandri,Elisa Paola Ambrosio,Flaviana Calignano,Massimo Lorusso,Diego Manfredi,Matteo Pavese,Sara Biamino,Paolo Fino,Paolo Fino +10 more
TL;DR: In this article, the authors summarized the activities performed at the Department of Applied Science and Technology (DISAT) and Istituto Italiano di Tecnologia (IIT) di Torino on the development of Ni-based superalloys produced by DMLS.
Journal ArticleDOI
Microstructure and mechanical properties of a novel selective laser melted Al–Mg alloy with low Sc content
A. Yu. Churyumov,A. V. Pozdniakov,A. S. Prosviryakov,I. S. Loginova,I. S. Loginova,D. K. Daubarayte,D. K. Ryabov,V. A. Korolev,Alexey N. Solonin,M. D. Pavlov,S. V. Valchuk +10 more
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.