Methodology for analyzing the depth of sintering in the building platform

Delgado, Jordi; Serenó, L.; Ciurana, Joaquim; Hernandez, Luis Radford

doi:10.1201/b11341-80

Cited by 6 publications

(2 citation statements)

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“…The latter methodology allowed the generation of a large amount of experiments per building platform and widespread information for further analysis. This variant permitted the estimation of the limit of continuity along the re-molten tracks under the different combinations of parameters, plus a variable thickness of the powder-bed layer in a reduced number of experimental runs (Delgado et al, 2012a(Delgado et al, , 2012b, as the slope on the powder bed was parallel to the laser scanning trajectory ( Figure 5) in contrast to the method used by Yadroitsev et al (2012). Another advantage was the reduced use of metallic powder Figure 3 Vertical milling center equipped with an adapted Ytterbium-fiber laser type due to the use of only a single powder bed for the production of the whole set of experiments.…”

Section: Single Track Forming Processmentioning

confidence: 99%

“…For each single track formed, six geometric features were measured using AutoCAD ® (Figure 7): track height (h 1 ), remelt depth (h 2 ), track width (w 1 ), contact angles (␣ 1 , ␣2) (Delgado et al, 2012a) Figure 5 Unidirectional scanning strategy used in the SLM experiments and the average value of these angles (␣) at different cross-sections.…”

Section: Measurement Of Track Geometrymentioning

confidence: 99%

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Geometrical feature analysis of Co-Cr-Mo single tracks after selective laser melting processing

Monroy

Delgado

Serenó

et al. 2015

Rapid Prototyping Journal

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Purpose - Therefore, the purpose of this study is to understand the relationships between the processing parameters and the geometric form of the produced single tracks, in order to control dimensional quality in future experimentations. The quality of the deposited single track and layer is of prime importance in the selective laser melting (SLM) process, as it affects the product quality in terms of dimensional precision and product performance. Design/methodology/approach - In this paper, a vertical milling machining center equipped with an Ytterbium-fiber laser was used in the SLM experimentation to form single cobalt-chromium-molybdenum (CoCrMo) tracks. The different geometric features and the influence of the scanning parameters on these morphologic characteristics were studied statistically by means of ANOVA. Findings - Evidently, track height (h1) inaccuracy reduced in layer thicknesses between 100 and 200 μm. The re-melt depth (h2) was determined by the energy parameters, with laser power of 325-350 W and scanning speed (SS) of 66.6-83.3 mm/s being the most favorable parameters to obtain the required anchoring. Moreover, a contact angle of 117° was proposed as optimal, as it permitted an adequate overlapping region and a full densification, and, finally, an SS of 50 mm/s and a layer thickness of 250 were suggested for its development. Originality/value - The comprehension of the phenomena inherent to the process is related to the single track geometrical characteristics, which allow the definition of an optimal value for each factor for a further proposal of processing conditions that can finally derive a higher precision, wetting, density and mechanical propertiesThe authors gratefully appreciate the financial supports from the Spanish Government (project DPI2009-09852) and the European Union Seventh Framework Programme (FP7-PEOPLE-2009) under the grant agreement IRSES n° 247476 that lead to these research result

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Section: Single Track Forming Processmentioning

confidence: 99%

Section: Measurement Of Track Geometrymentioning

confidence: 99%

Geometrical feature analysis of Co-Cr-Mo single tracks after selective laser melting processing

Monroy

Delgado

Serenó

et al. 2015

Rapid Prototyping Journal

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Selective Laser Sintering

Delgado

Serenó

Monroy

et al. 2019

Modern Manufacturing Processes

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Effects of the Selective Laser Melting manufacturing process on the properties of CoCrMo single tracks

et al. 2014

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Selective Laser Melting (SLM) is an additive technology that produces solid parts by selectively melting thin layers of metallic powder. SLM can produce significant differences in the final properties due to the melting-consolidation phenomena of the process, which can be controlled by the appropriate parameters. Therefore, the objective of this study was to create a link between the process conditions and the resulting properties by experimenting in an own-developed SLM machine using CoCrMo powder as material. The fabricated samples were characterized by density, hardness and microstructural properties. The experimental results proved the capability of the SLM technique to build high dense samples. The hardness results gave evidence of a superior outcome compared to conventional processes. Finally, it was found that grain size was defined by scanning speed. Based on the results, a better understanding of the processing principles given by the parameters was achieved and improved fabrication quality was promotedThe authors gratefully appreciate the financial support from the European Union Seventh Framework Programme (FP7-PEOPLE-2009) under the IRSES n 247476 grant agreement, which led to these research result

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Methodology for analyzing the depth of sintering in the building platform

Cited by 6 publications

References 0 publications

Geometrical feature analysis of Co-Cr-Mo single tracks after selective laser melting processing

Geometrical feature analysis of Co-Cr-Mo single tracks after selective laser melting processing

Selective Laser Sintering

Effects of the Selective Laser Melting manufacturing process on the properties of CoCrMo single tracks

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