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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High-performance microwave waveguide devices produced by laser powder bed fusion process
Flaviana Calignano,Oscar Antonio Peverini,Giuseppe Addamo,Fabio Paonessa,Diego Manfredi,Manuela Galati,Alessandro Salmi,Eleonora Atzeni,Paolo Minetola,Luca Iuliano +9 more
TL;DR: In this paper, the authors report the perspectives deriving from the use of laser powder bed fusion (L-PBF) technology to the production of high-performance microwave waveguide devices.
Journal ArticleDOI
Surface topography of nickel-based superalloy manufactured with direct metal laser sintering (DMLS) method
Journal ArticleDOI
Comparison of Additively Manufactured Louvered Plate-Fin Heat Exchangers
TL;DR: In this article, the authors compared the thermal and hydraulic performance of three AM HXs built using a traditionally manufactured, stamped aluminum oil cooler design and found that the AMHXs exhibited significantly higher air-side pressure drop and higher heat transfer rate than the traditional HX in large part due to increased AM surface roughness.
Journal ArticleDOI
Effect of scanning strategy on geometric accuracy of the circle structure fabricated by selective laser melting
TL;DR: In this paper, the theoretical models of the circle structures with different scanning strategies in selective laser melting were established to establish the theoretical model of the surface morphology of circle structures and the prediction of the geometric accuracy was performed by using these models.
Study and Application Status of Additive Manufacturing of Typical Inorganic Non-metallic Materials
TL;DR: In this paper, the key problems existed in additive manufacturing forming process of inorganic non-metallic material are pointed out and urgent to be solved at present, and the impacts of the material handling process, three dimensional printing (3DP), Selective Laser Sintering (SLS), and SLM three-dimensional forming processes and post treatment process on the quality and performance of the forming parts are analyzed.
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.