A5003973871- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Laser Material Processing Techniques
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- Metal Alloys Wear and Properties
- Nanomaterials and Printing Technologies
- Nanofabrication and Lithography Techniques
- Metamaterials and Metasurfaces Applications
KU Leuven
2020-2024
Flanders Make (Belgium)
2020-2022
Friedrich-Alexander-Universität Erlangen-Nürnberg
2020
High surface roughness observed in the as-built condition is still a limiting factor for metal parts processed by laser powder bed fusion (L-PBF). This mainly due to highly degrading effect of poor quality on fatigue performance. As promising in-process alternative, dual-laser (dL-PBF) technique has recently been proven increase and life L-PBF with up-facing inclined surfaces, reducing need additional post-treatments. paper shows beneficial dL-PBF three-point bending lightweight...
We demonstrate the fabrication of diffraction-limited dielectric metasurface lenses for NIR by use standard industrial high-throughput silicon processing techniques: UV nano imprint lithography (UV-NIL) combined with continuous reactive ion etching (RIE) and pulsed Bosch deep (DRIE). As research field metasurfaces moves towards applications, these techniques are relevant as potential replacements commonly used cost-intensive methods utilizing electron beam ithography. show that...
It is well known that the relatively poor surface quality of metal parts produced by Laser Powder Bed Fusion (LPBF) compared to conventionally manufactured has a negative effect on their fatigue life. To enhance life, time consuming post-processing (e.g. machining, polishing) typically applied improve quality. remelting promising technique for improvement, applicable variable shapes. However, laser traditionally only used as post-process since surfaces inclined with respect powder bed are...
Surface quality of parts produced by laser powder bed fusion (LPBF) is often insufficient for their final application. Up-facing inclined surfaces are among the major challenges, due to combination elevated edges (edge effect) and staircase effect. This work presents a novel methodology enhance using dual PBF setup. In first step called “selective removal”, blown away from undesired areas shock waves nanosecond pulsed wave laser. Consequently, newly exposed can be remelted with continuous...
Additive manufacturing can generate parts with complex shapes such as industrial mould components. However, the resulting surface texture often does not fulfil requirements, thus requiring costly post-processing. This paper further develops a dual laser Powder Bed Fusion technique for in-situ improving quality of inclined surfaces. It combines selective powder removal by laser-induced shock waves and subsequent remelting. method is applied to novel tool steel (M789) suitable applications...
The low quality of up-facing inclined surfaces, combined with a lack in-situ treatments, is crucial challenge in Laser Powder Bed Fusion (LPBF) metals. This study proposes an Incremental Dual (IDLPBF) strategy to enhance the surfaces metal parts by automatically alternating between laser remelting and building height steps 1.5 mm. involves selectively removing powder that covering surface through nanosecond pulsed laser-induced shock waves subsequently uncovered using continuous wave laser....
The fatigue strength of metal components produced by Laser Powder Bed Fusion (LPBF) is often impaired their limited surface quality, and finishing post-processing steps are typically required to improve the behavior. However, complex geometries LPBF parts sometimes inhibit conventional finishing. Recently, Incremental Dual PBF (IDLPBF) was introduced as a strategy for in-process quality improvement up-facing inclined surfaces alternating between building laser remelting in height 1.5 mm....