2017
DOI: 10.1016/j.addma.2016.12.002
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Improving dimensional accuracy in EBM using beam characterization and trajectory optimization

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Cited by 22 publications
(7 citation statements)
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“…After the melting step, the material is solid with virtually no porosity. Reduction in porosity results in reduced layer thickness of the melted zones, i.e., volume shrinkage and an increase of the overall layer thickness up to 80 μ m [14]. This means that a powder with particle size of 45-106 μ m is suitable for applying a layer with a theoretical thickness of 50 μ m.…”
Section: Methodsmentioning
confidence: 99%
“…After the melting step, the material is solid with virtually no porosity. Reduction in porosity results in reduced layer thickness of the melted zones, i.e., volume shrinkage and an increase of the overall layer thickness up to 80 μ m [14]. This means that a powder with particle size of 45-106 μ m is suitable for applying a layer with a theoretical thickness of 50 μ m.…”
Section: Methodsmentioning
confidence: 99%
“…Béraud et al worked on the finite element modeling (FEM) and simulated the process to see the effect of process parameters on the parts. Using appropriate process parameters, the dimensional accuracy can be improved by 60 per cent (Béraud et al, 2017).…”
Section: Challengesmentioning
confidence: 99%
“…Truss dimension accuracy and repeatability can be improved to a certain extent with optimised SLM process parameters. The influences of process parameters on part quality are determined for fine-tuning and optimisation via a generally costly experimental test matrix [27][28] [29]. Still, process optimisation cannot fully eliminate geometric imperfections due to inherent process limitations.…”
Section: Introductionmentioning
confidence: 99%
“…For example, the optimised parameters are generally applied for all trusses; the overhang angle, size and shape dependency therefore cannot be considered. In addition, with optimised process parameters the printed trusses still show deviations from the as-designed geometry for larger overhang angles, such as non-circular cross-sections, due to the penetration of the heat source into the layers below the current build layer [27].…”
Section: Introductionmentioning
confidence: 99%