Novel strategy for quality improvement of up-facing inclined surfaces of LPBF parts by combining laser-induced shock waves and in situ laser remelting

Metelková, Jitka; Ordnung, Daniel; Kinds, Yannis; Hooreweder, Brecht Van

doi:10.1016/j.jmatprotec.2020.116981

Cited by 28 publications

(7 citation statements)

References 33 publications

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“…As reported in a previous work Metelkova and Ordnung et al (2021), insufficient powder removal can cause significant quality issues. The metal powder remaining on the inclined surface would be melted during the remelting step.…”

Section: Powder Removal Using Liswmentioning

confidence: 66%

“…After this sequence, the build cylinder is moved back to its initial position and the building process can be resumed. The build cylinder offset was implemented in order to optimize the powder removal efficiency (Metelkova and Ordnung et al 2021). For samples with a small depth d, this step might be omitted.…”

Section: Selective Powder Removal and Inclined Surface Remeltingmentioning

confidence: 99%

“…For samples with a small depth d, this step might be omitted. The optimal process parameters for powder removal by LISW (Table 1) were selected based on previous research (Metelkova et al 2020;Metelkova and Ordnung et al 2021).…”

Section: Selective Powder Removal and Inclined Surface Remeltingmentioning

confidence: 99%

“…Different observations were made by Metelkova and Ordnung et al (2021), for samples with α = 5 • , made from the same material, in the same machine and process parameters. The authors did not observe a significant impact of the number of LISW powder removal passes on the surface quality after remelting with identical process parameters to this study.…”

Section: Laser Remelting After Lisw Powder Removalmentioning

confidence: 99%

See 3 more Smart Citations

Hybrid dual laser processing for improved quality of inclined up-facing surfaces in laser powder bed fusion of metals

Metelková

Vanmunster

Haitjema

et al. 2021

Journal of Materials Processing Technology

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Section: Powder Removal Using Liswmentioning

confidence: 66%

Section: Selective Powder Removal and Inclined Surface Remeltingmentioning

confidence: 99%

Section: Selective Powder Removal and Inclined Surface Remeltingmentioning

confidence: 99%

Section: Laser Remelting After Lisw Powder Removalmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid dual laser processing for improved quality of inclined up-facing surfaces in laser powder bed fusion of metals

Metelková

Vanmunster

Haitjema

et al. 2021

Journal of Materials Processing Technology

Self Cite

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“…Additionally, the surface microhardness was increased by 57.6% due to the laser processing. Metelkova et al report on an in-process laser polishing approach where laser shockwaves were used to remove powder from inclined surfaces which would normally be occluded by powder, to clear them for polishing [ 125 ].…”

Section: Hybrid In-process Metal Am Processingmentioning

confidence: 99%

Digitisation of metal AM for part microstructure and property control

et al. 2022

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Metal additive manufacturing, which uses a layer-by-layer approach to fabricate parts, has many potential advantages over conventional techniques, including the ability to produced complex geometries, fast new design part production, personalised production, have lower cost and produce less material waste. While these advantages make AM an attractive option for industry, determining process parameters which result in specific properties, such as the level of porosity and tensile strength, can be a long and costly endeavour. In this review, the state-of-the-art in the control of part properties in AM is examined, including the effect of microstructure on part properties. The simulation of microstructure formation via numerical simulation and machine learning is examined which can provide process quality control and has the potential to aid in rapid process optimisation via closed loop control. In-situ monitoring of the AM process, is also discussed as a route to enable first time right production in the AM process, along with the hybrid approach of AM fabrication with post-processing steps such as shock peening, heat treatment and rolling. At the end of the paper, an outlook is presented with a view towards potential avenues for further research required in the field of metal AM.

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