Areal topography measurement of metal additive surfaces using focus variation microscopy

Newton, Lewis; Senin, Nicola; Gómez, Cynthia; Danzl, Reinhard; Helmli, Franz; Blunt, Liam; Leach, Richard

doi:10.1016/j.addma.2018.11.013

Cited by 62 publications

(50 citation statements)

References 22 publications

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“…There are investigations into employing areal parameters, which aim to more adequately capture AM surface information, such as Sa, the areal counterpart of Ra [117]. Regarding instrumentation, XCT has been used to extract areal parameters from AM surfaces, however, only from planar surfaces, as in references [118][119][120].…”

Section: Discussion Of Measurement Methodsmentioning

confidence: 99%

Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

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148

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Additively manufactured lattice structures are popular due to their desirable properties, such as high specific stiffness and high surface area, and are being explored for several applications including aerospace components, heat exchangers and biomedical implants. The complexity of lattices challenges the fabrication limits of additive manufacturing processes and thus, lattices are particularly prone to manufacturing defects. This paper presents a review of defects in lattice structures produced by powder bed fusion processes. The review focuses on the effects of lattice design on dimensional inaccuracies, surface texture and porosity. The design constraints on lattice structures are also reviewed, as these can help to discourage defect formation. Appropriate process parameters, post-processing techniques and measurement methods are also discussed. The information presented in this paper contributes towards a deeper understanding of defects in lattice structures, aiming to improve the quality and performance of future designs.

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Section: Discussion Of Measurement Methodsmentioning

confidence: 99%

Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

Self Cite

148

View full text Add to dashboard Cite

show abstract

“…Fracture surface analysis was performed by Macek [ 34 , 35 , 39 ] using an optical 3D test stand that facilitated the acquisition of data sets at a high depth of focus [ 45 , 46 ]. The failed specimens were observed under 10× magnification using an Alicona G4 InfiniteFocus (Alicona Imaging GmbH, Graz, Austria) as described previously [ 47 ].…”

Section: Materials and Methods Of Measurementmentioning

confidence: 99%

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

et al. 2020

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Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work compared both the crack propagation and rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AW-2017A under bending, torsion and combined bending–torsion were investigated. After the fatigue tests, fatigue fractures were measured with an optical profilometer, and the relevant surface parameters were critically compared. The results showed a great impact of the loading scenario on both the local profiles and total fracture areas. Both approaches (local and total fracture zones) for specimens with different geometries were investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area and propagation area.

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“…Fracture surface analysis was performed using an optical 3D test stand facilitating the acquisition of data sets at a high depth of focus [43,44]. The failed specimens were observed under 10x magnification using an Alicona G4 InfiniteFocus accordingly to the procedure described in the previous work [45].…”

Section: Surface Parameter Measurement and Calculationmentioning

confidence: 99%

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Macek

Branco

Szala

et al. 2020

Preprint

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Post-mortem characterisation is a pivotal tool to trace back to the origin of structural failures in modern engineering analyses. This work presents a comparison of both the crack propagation profiles and the rupture roughness profiles based on areal parameters for total fracture area. Notched and smooth samples made of weather-resistant structural steel (10HNAP), popular S355J2 structural steel and aluminium alloy AA2017A under bending, torsion, and combined bending-torsion are investigated. After the fatigue tests, fatigue fractures are measured with an optical profilometer, and the relevant surface parameters are critically compared. The results show a great impact of the loading scenario on both the local profiles and the total fracture areas. In this work, the results of both approaches (local and total fracture zones) for specimens with different geometries are investigated. For all specimens, measured texture parameters decreased in the following order: total area, rupture area, and propagation area.

show abstract

Areal topography measurement of metal additive surfaces using focus variation microscopy

Cited by 62 publications

References 22 publications

Review of defects in lattice structures manufactured by powder bed fusion

Review of defects in lattice structures manufactured by powder bed fusion

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

Profile and Areal Surface Parameters for Fatigue Fracture Characterisation

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