Three dimensional surface topography characterization of the electron beam melted Ti6Al4V

Sidambe, Alfred T.

doi:10.1016/j.mprp.2017.02.003

Cited by 35 publications

(16 citation statements)

References 27 publications

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“…This can only be explained by the different angle of impact of the laser beam on the powder bed in the center and corners of the build platform. The measured roughness values correspond to the values found by Sidambe [35], although he uses the spatial parameters (Sa) instead of profile parameters (Ra), and correspond also to the values The measured roughness values correspond to the values found by Sidambe [35], although he uses the spatial parameters (Sa) instead of profile parameters (Ra), and correspond also to the values given in [1]. Sidambe also notes that horizontally oriented surfaces have lower roughness values than inclined surfaces.…”

Section: Roughness Of Materialssupporting

confidence: 87%

The Effect of Position of Materials on a Build Platform on the Hardness, Roughness, and Corrosion Resistance of Ti6Al4V Produced by DMLS Technology

Guzanová

Draganovská

Ižaríková

et al. 2019

Metals

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This article is focused on the effect of position on a build platform on the hardness, roughness and corrosion rate of parts (Ti6Al4V) produced by direct metal laser sintering (DMLS) technology. During the sintering process, the test samples were located at key positions—at the corners and in the middle of the build platform. An experimental program started with a microstructure investigation in two perpendicular directions in individual positions. The selected mechanical property—hardness—was investigated on metallographic cuts in both directions and all positions, and data sets underwent a statistical analysis (analysis of variance (ANOVA), t-test, F-test). The same procedure was repeated for an assessment of position effect to surface roughness (Kruskal–Wallis test) and material corrosion resistance. On the build platform, the course of hardness, roughness, and corrosion rate values that can be expected in individual positions was mapped in detail.

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Section: Roughness Of Materialssupporting

confidence: 87%

The Effect of Position of Materials on a Build Platform on the Hardness, Roughness, and Corrosion Resistance of Ti6Al4V Produced by DMLS Technology

Guzanová

Draganovská

Ižaríková

et al. 2019

Metals

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“…It is revealed that the surface roughness of EBM-built sample can be varied by modifying the processing parameters. The lowest surface roughness is ~20 µm, compared to the highest surface roughness is ~40 µm, which differs from the previous reports by using an earlier version of EBM system, S12 [ 23 , 29 ]. Two optimized processing parameters are N5 and N6, as listed in Table 1 .…”

Section: Resultscontrasting

confidence: 79%

“…Due to the nature of the EBM building process, the as-built parts have relatively rough surfaces as compared to those conventionally machined surfaces [ 4 , 5 , 23 , 24 , 25 ]. The EBM part’s rough surface reduces the effective cross section [ 24 , 26 ], which changes the mechanical response [ 3 , 27 ] and results in premature failure of the part [ 24 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…This is one of the reasons limiting the wide adoption of the EBM technology in the manufacture of parts for industrial use [ 29 , 30 ]. The partially melted powder (in terms of powder size), staircase effect (in terms of layer thickness), and process parameters are three key factors to influence the surface quality of the EBM components [ 3 , 23 , 24 , 25 , 29 ]. The metal powders typically used for the EBM technology range from 45 to 150 µm, the staircase effect is dependent on the curvature of the part’s surface and the deposition layer thickness that normally ranges from 50 to 200 µm.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Processing Parameters on Surface Roughness of Additive Manufactured Ti-6Al-4V via Electron Beam Melting

et al. 2017

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As one of the powder bed fusion additive manufacturing technologies, electron beam melting (EBM) is gaining more and more attention due to its near-net-shape production capacity with low residual stress and good mechanical properties. These characteristics also allow EBM built parts to be used as produced without post-processing. However, the as-built rough surface introduces a detrimental influence on the mechanical properties of metallic alloys. Thereafter, understanding the effects of processing parameters on the part’s surface roughness, in turn, becomes critical. This paper has focused on varying the processing parameters of two types of contouring scanning strategies namely, multispot and non-multispot, in EBM. The results suggest that the beam current and speed function are the most significant processing parameters for non-multispot contouring scanning strategy. While for multispot contouring scanning strategy, the number of spots, spot time, and spot overlap have greater effects than focus offset and beam current. The improved surface roughness has been obtained in both contouring scanning strategies. Furthermore, non-multispot contouring scanning strategy gives a lower surface roughness value and poorer geometrical accuracy than the multispot counterpart under the optimized conditions. These findings could be used as a guideline for selecting the contouring type used for specific industrial parts that are built using EBM.

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“…Many authors in the research are focused on the effects of Ti6Al4V processing technology on its mechanical, fatigue properties, surface quality after machining, and so on [20][21][22][23][24][25][26]. In particular, the influence of the building direction in additive technologies is observed.…”

Section: Research Activities Related To Dmls/slm Of Ti6al4vmentioning

confidence: 99%

Influence of Build Orientation, Heat Treatment, and Laser Power on the Hardness of Ti6Al4V Manufactured Using the DMLS Process

Guzanová

Ižaríková

Brezinová

et al. 2017

Metals

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This contribution is focused on the influence of build orientation on hardness of materials sintered using direct metal laser sintering (DMLS) technology. It builds on the current research works that has monitored the influence of build orientation on a fatigue life, mechanical properties, roughness after machining, etc. In the mentioned work, a slight influence of build orientation on the above properties was shown. The hardness was measured on a Ti6Al4V alloy which was made of powder by DMLS technology. The individual materials were sintered at different laser powers, then annealed to remove internal stresses. Part of the experiment examined the metallographic analysis of materials in the direction perpendicular to the sintered layers and parallel with the sintered layers. Microhardness was measured on metallographic cross-sections and the results were statistically processed. The influence of laser power on a respective material hardness was assessed by one-way analysis of variance (ANOVA), a comparison of the hardness between sintered and sintered-annealed samples, as well as the comparison of hardness in the two considered directions was performed by t-test and F-test. A statistically significant difference in the hardness of the materials prepared at different laser powers was found. The influence of heat treatment, as well as the direction of material building also showed a statistically significant difference.

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Three dimensional surface topography characterization of the electron beam melted Ti6Al4V

Cited by 35 publications

References 27 publications

The Effect of Position of Materials on a Build Platform on the Hardness, Roughness, and Corrosion Resistance of Ti6Al4V Produced by DMLS Technology

The Effect of Position of Materials on a Build Platform on the Hardness, Roughness, and Corrosion Resistance of Ti6Al4V Produced by DMLS Technology

Effects of Processing Parameters on Surface Roughness of Additive Manufactured Ti-6Al-4V via Electron Beam Melting

Influence of Build Orientation, Heat Treatment, and Laser Power on the Hardness of Ti6Al4V Manufactured Using the DMLS Process

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