Study of the Pore Formation on CoCrMo Alloys by Selective Laser Melting Manufacturing Process

Monroy, Karla; Delgado, Jordi; Ciurana, Joaquim

doi:10.1016/j.proeng.2013.08.227

Cited by 121 publications

(65 citation statements)

References 10 publications

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“…Typical porosities common in SLS/SLM processed parts are insufficient/incomplete melting (lack of fusion) porosity; porosity as a consequence of entrapment of gases by surface 121 turbulence, and shrinkage porosity [28,41,96,162,163]. Porosities caused by insufficient/incomplete melting (lack of fusion porosity) are usually found along layer boundaries, irregularly shaped, and elongated in the x-y plane of the deposit with the size and number of pores strongly influenced by processing parameters such as laser power, layer thickness, scanning rates, and scan spacing [28,41,96].…”

Section: Porositymentioning

confidence: 99%

See 1 more Smart Citation

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

Olakanmi

Mullis

Dalgarno

2015

Progress in Materials Science

1,384

526

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Section: Porositymentioning

confidence: 99%

“…The entrapment of the gas bubbles thereby results in an unstable scan track because the vapourisation of the scan tracks is not uniform while their positions vary with time [7,58,96,129,163]. Scan track stability during SLS/SLM processing is also a function of the balance of forces active within the scan track.…”

Section: Porositymentioning

confidence: 99%

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

Olakanmi

Mullis

Dalgarno

2015

Progress in Materials Science

1,384

526

View full text Add to dashboard Cite

“…The acquired images were processed and binarized using a suitable threshold value and the relative porosity was calculated as a ratio of the black to white pixels that corresponded with the fraction of the surface voids over the total surface [22]. The pore size distribution of the fabricated samples has been calculated from a minimum of 5 3D printed samples.…”

Section: Microscopymentioning

confidence: 99%

Assessing extraterrestrial regolith material simulants for in-situ resource utilisation based 3D printing

Goulas

Binner

Harris

et al. 2017

Applied Materials Today

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This research paper investigates the suitability of ceramic multicomponent materials, which are found on the Martian and Lunar surfaces, for 3D printing (aka Additive Manufacturing) of solid structures. 3D printing is a promising solution as part of the cutting edge field of future in situ space manufacturing applications. This investigation has shown that -provided that the simulants are good matches for the actual regoliths -the lunar material is a viable candidate material for powder bed fusion 3D printing, whereas Martian regolith is not.

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“…The acquired images were processed and binarized using a threshold value as shown in Figure 2. The relative porosity was calculated as a ratio of the black to white pixels which corresponded with the fraction of the surface voids over the total surface (Monroy et al, 2013).…”

Section: Manufacturing Equipmentmentioning

confidence: 99%

3D printing with moondust

Goulas

Friel

2016

RPJ

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Purpose -The purpose of this paper is to investigate the effect of the main process parameters of Laser Melting (LM) type Additive Manufacturing (AM) on multi layered structures manufactured from JSC-1A Lunar regolith (Moondust) simulant powder.Design/methodology/approach -Laser diffraction technology was used to analyse and confirm the simulant powder material particle sizes and distribution. Geometrical shapes were then manufactured on a Realizer SLM™ 100 using the simulant powder. The laserprocessed samples were analysed via Scanning Electron Microscopy (SEM) to evaluate surface and internal morphologies, Energy-dispersive X-ray Spectroscopy (EDS) to analyse the chemical composition after processing and the samples were mechanically investigated via Vickers micro-hardness testing.Findings -A combination of process parameters resulting in an energy density value of 1.011 J/mm 2 allowed the successful production of components directly from Lunar regolithsimulant. An internal relative porosity of 40.8 %, material hardness of 670 ± 11 HV and a dimensional accuracy of 99.8 % were observed in the fabricated samples. Originality/value -This research paper is investigating the novel application of a PowderBed Fusion AM process category as a potential on-site manufacturing approach for manufacturing structures/components out of Lunar regolith (Moondust). It was shown that this AM process category has the capability to directly manufacture multi-layered parts out of Lunar regolith, which has potential applicability to future moon colonization.

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Study of the Pore Formation on CoCrMo Alloys by Selective Laser Melting Manufacturing Process

Cited by 121 publications

References 10 publications

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

Assessing extraterrestrial regolith material simulants for in-situ resource utilisation based 3D printing

3D printing with moondust

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