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:Â
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
Achieving low surface roughness AlSi10Mg_200C parts using direct metal laser sintering
Mohsen Mohammadi,Hamed Asgari +1 more
TL;DR: In this paper, the process parameters such as laser power, scan speed, and hatch spacing were altered such that better surface roughness could be achieved for AlSi10Mg_200C using a Direct Metal Laser Sintering (DMLS) system.
Journal ArticleDOI
Surface quality and material removal in magnetic abrasive finishing of selective laser melted 316L stainless steel
TL;DR: In this paper, the effect of slope angle on surface finish of the samples fabricated by selective laser melting is characterized by scanning electron microscope and profilometer, and an analytical model of material removal rate is devised by correlating initial surface roughness of workpiece generated by SLM with abrasive indentation depth, which eventually determines the total material removal volume in MAF process.
Journal ArticleDOI
Build Direction Effects on Microchannel Tolerance and Surface Roughness
TL;DR: In this paper, the direct metal laser sintering (DMLS) process was used to additively manufacture test coupons and the additive manufacturing process was varied to study its effect on small micro-sized, circular channels.
Journal ArticleDOI
Selective laser melting of titanium parts: Influence of laser process parameters on macro- and microstructures and tensile property
TL;DR: In this paper, the effect of laser process parameters on the density, surface morphology, dimensional accuracy, microstructure and tensile property of SLMed Ti6Al4V parts was investigated.
Journal ArticleDOI
Evaluation of the stress-strain relationship of constituent phases in AlSi10Mg alloy produced by selective laser melting using crystal plasticity FEM
TL;DR: In this article, the authors evaluated the stress-strain relationship between Al and Si constituents in AlSi10Mg alloy produced by selective laser melting (SLM) under uniaxial tension at room temperature.
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.