Matthias Buser
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View article: Measuring the Progress of Laser Drilling by Means of OCT and Validation Using X-Ray Synchrotron Imaging
Measuring the Progress of Laser Drilling by Means of OCT and Validation Using X-Ray Synchrotron Imaging Open
The progress of laser drilling of deep holes was observed by means of optical coherence tomography (OCT) and simultaneously by high-speed imaging with an X-ray synchrotron. A good agreement of the depths measured by OCT and the ones extrac…
View article: United by Sports? Key Factors affecting Sports Participation in a Sports-based Initiative to Promote Social Integration in Segregated Communities
United by Sports? Key Factors affecting Sports Participation in a Sports-based Initiative to Promote Social Integration in Segregated Communities Open
Introduction Sweden's society has become ethnically diverse, yet social exclusion and segregation remain prevalent problems, particularly in employment, housing, and education (Dahlstedt & Ekholm, 2018). Acknowledging this challenge, the S…
View article: Relevant Elements of Standardisation of Federation’s Advisory Programs for Voluntary Sports Clubs
Relevant Elements of Standardisation of Federation’s Advisory Programs for Voluntary Sports Clubs Open
Introduction Sports federations are increasingly inclined to support their member clubs' structural and organisational development (Schlesinger et al., 2021). Thus, federations offer tools and training courses and have started implementing…
View article: Increasing productivity by combining laser processes
Increasing productivity by combining laser processes Open
Increasing the material ablation rate in micromachining of precise geometries by ultrashort‐pulsed laser treatment with high average power causes a decrease of achievable surface quality due to heat accumulation. To overcome this drawback,…
View article: Closed-loop Laser Volume Ablation with Adaptive Scan Paths
Closed-loop Laser Volume Ablation with Adaptive Scan Paths Open
This research focuses on closed-loop control in laser volume ablation, also known as laser milling. Such process control enables precise ablation results on workpieces with much wider tolerances regarding the initial surface geometry, inte…
View article: Bridging additive and subtractive manufacturing
Bridging additive and subtractive manufacturing Open
Additive manufacturing with laser powder‐bed fusion (PBF‐LB/M) can generate complex metal parts with a high degree of design freedom, which are already being used in various industries. However, the PBF‐LB/M process faces some limitations …
View article: Laser material processing optimization using bayesian optimization: a generic tool
Laser material processing optimization using bayesian optimization: a generic tool Open
Optimizing laser processes is historically challenging, requiring extensive and costly experimentation. To solve this issue, we apply Bayesian optimization for process parameter optimization to laser cutting, welding, and polishing. We dem…
View article: High-speed synchrotron X-ray imaging of micro-hole formation during the ablation of grooves by ultrashort laser pulses
High-speed synchrotron X-ray imaging of micro-hole formation during the ablation of grooves by ultrashort laser pulses Open
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View article: The promotion of women and girls in Swiss sports associations: Addressing, launching, and implementing decision-making structures and promotion programmes
The promotion of women and girls in Swiss sports associations: Addressing, launching, and implementing decision-making structures and promotion programmes Open
Many historically male-dominated sports still have a lower participation of women and girls at all levels. Women also seldom occupy decision-making positions at both association and club levels. At the same time, associations and sponsors …
View article: Increasing the precision of Laser-Based Powder Bed Fusion by process combination with in situ laser ablation
Increasing the precision of Laser-Based Powder Bed Fusion by process combination with in situ laser ablation Open
Laser-based powder bed fusion of metals is limited in terms of achievable accuracy, surface quality, and minimal structure size due to its inherent melting process. The limits are primarily determined by the focal diameter of the laser bea…
View article: Post-processing of additively manufactured metal parts by ultrashort laser pulses for high-quality net shape geometries and advanced functionality
Post-processing of additively manufactured metal parts by ultrashort laser pulses for high-quality net shape geometries and advanced functionality Open
Additive manufacturing by means of laser-based powder bed fusion (LPBF) offers high flexibility with respect to the generation of individualized and light-weight metal parts. However, the produced parts are typically attached to support st…
View article: A Process-Planning Framework for Sustainable Manufacturing
A Process-Planning Framework for Sustainable Manufacturing Open
Process planning in manufacturing today focuses on optimizing the conflicting targets of cost, quality, and time. Due to increasing social awareness and subsequent governmental regulation, environmental impact becomes a fourth major aspect…
View article: High-quality net shape geometries from additively manufactured parts using closed-loop controlled ablation with ultrashort laser pulses
High-quality net shape geometries from additively manufactured parts using closed-loop controlled ablation with ultrashort laser pulses Open
Additively manufactured parts typically deviate to some extent from the targeted net shape and exhibit high surface roughness due to the size of the powder grains that determines the minimum thickness of the individual slices and due to pa…
View article: Automated free-space beam delivery system for ultrafast laser beams in the kW regime
Automated free-space beam delivery system for ultrafast laser beams in the kW regime Open
In contrast to cw laser beams, the beam delivery of ultrafast laser beams with high average power or high pulse energies using optical fibers is still a challenge. In this paper, we present a free-space delivery and distribution system, wh…
View article: In-process determination of fiber orientation for layer accurate laser ablation of CFRP
In-process determination of fiber orientation for layer accurate laser ablation of CFRP Open
Complex repair geometries including stepped laser ablation of damaged areas in CFRP parts significantly increase the bonding strength of the reconstruction patch. In the optimum case the steps in the repair geometry exactly fit the fiber l…