Efficient material laser beam ablation with a picosecond laser

AvJuan Pablo Calderón Urbina

Häftad, Engelska, 2020

Del i serien Light Engineering für die Praxis

1 430 kr

Beställningsvara. Skickas inom 10-15 vardagar. Fri frakt över 249 kr.

Fler format och utgåvor

E-bok

1 746 kr

Beskrivning

Ultra-short pulse laser processing of ultra-hard materials requires an accurate and agile experimental and analytical investigation to determine an efficient choice of parameters and settings to optimize ablation. Therefore, this work presents a quality-oriented experimental approach and an analytical approach for the modeling and validation of multi-pulse picosecond laser beam ablation on cemented tungsten carbide. This work starts with a review of literature and state-of-the-art theories of four relevant areas for this research: picosecond lasers, laser beam ablation process, cemented tungsten carbide (WC) and quality-oriented tools. Subsequently, a concept for an efficient material laser beam ablation with a picosecond laser was introduced. Furthermore, two approaches for the investigation are presented from an experimental and analytical perspective, respectively. The first approach introduced a methodology for the identification of influential parameters. It executes a quality-oriented methodology based on the SWOT analysis, cause-and-effect diagram and the variable search methodology. The conclusion of the methodology gave the interaction of pulse repetition rate and scanner speed in the form of pulse overlap and track overlap PO/TO as the most influential parameter in the maximization of the ablation rate. The second most influential factors resulted laser beam power and burst-mode. The second approach, description of the model, executes a theoretical analysis of the picosecond laser beam ablation of cemented WC by the application of the Beer-Lambert law and multi-pulse ablation modeling. The unavailable material properties were obtained by experimental investigations, like in the cases of the incubation factor and the reflectivity factor. Threshold fluence for cemented WC was determined by the application of the heat transfer theory and input power intensity was adapted to a Gaussian beam profile. At the end of the approach, power density visualizations of a picosecond laser pulse under the five available pulse repetition rates were modeled and validated. The findings from the adaptation of the Beer-Lambert law acted as basis for development of the multi-pulse laser ablation model for both single-pulse mode and burst-mode, respectively. Based on the definition of the number of pulses N irradiating the same area, the corresponding threshold fluence for N, the input fluence and incubation factor, ablation depth was modeled and experimentally validated. Finally, results and conclusions of both approaches were discussed and a framework for an efficient laser beam ablation was presented. Recommendations for further actions on research and industry were introduced at the end of the work.

Produktinformation

Utgivningsdatum:2020-07-23
Mått:168 x 240 x 17 mm
Vikt:406 g
Format:Häftad
Språk:Engelska
Serie:Light Engineering für die Praxis
Antal sidor:210
Upplaga:20001
Förlag:Springer Fachmedien Wiesbaden
ISBN:9783662618851

Utforska kategorier

Mer om författaren

Juan Pablo Calderón Urbina obtained his Bachelor’s degree in Industrial Engineering at the Morelia Institute of Technology in Morelia, Mexico (Instituto Tecnológico de Morelia). He specialized in International Production Management at the Hamburg University of Technology (Technische Universität Hamburg) for his Master of Science’s degree. Until 2013, he collaborated as a research assistant in several research and industrial projects with the Laser Zentrum Nord GmbH. In 2019, he concluded his scientific research and completed his doctorate at the Hamburg University of Technology, in the Institute of Laser and System Technologies (Institut für Laser- und Anlagensystemtechnik, iLAS).

Innehållsförteckning

Introduction.- State of the art.- Research concept and approaches.- Methodology for the identification of influential parameters.- Description of the model.- Evaluation of results and analysis of influential parameters.- Conclusion and outlook.

Mer från samma serie

Additive Manufacturing of Mechatronic Integrated Devices

Friedrich Wilhelm Proes

Häftad, 2022

554 kr

Digitalization of design for support structures in laser powder bed fusion of metals

Katharina Bartsch

Häftad, 2023

1 544 kr

Automated Process Planning for Additive Manufacturing with Directed Energy Deposition

Vishnuu Jothi Prakash

Häftad, 2025

1 211 kr

Methodology for Biomimetic Design of Additively Manufactured Structural Components

Tim Röver

Häftad, 2026

1 978 kr

Analysis of Sinter-Based Additive Manufacturing for Functional Products

Karim Asami

Häftad, 2026

1 235 kr

Analysis and Method to Increase the Productivity of Laser-based Powder Bed Fusion of Metals

Gefei Li

Häftad, 2026

1 540 kr

Nyhet

Hot Isostatic Pressing of Ti-6Al-4V Processed by Laser Powder Bed Fusion

Viviane Kettermann Fernandes

Häftad, 2026

2 197 kr

Implementierung von schichtadditiven Fertigungsverfahren

Maike Grund

Häftad, 2015

672 kr

Laseradditiv gefertigte, luftdurchlässige Mesostrukturen

Christoph Klahn

Häftad, 2015

826 kr

Potentialbewertung generativer Fertigungsverfahren für Leichtbauteile

Tobias Schmidt

Häftad, 2016

826 kr

Du kanske också är intresserad av

10% rabatt på allt

L'amour toujours : Berättelsen om Tidö

Maggie Strömberg, Torbjörn Nilsson

Inbunden, 2026

275 kr

Potenzialerschließung und -bewertung der sinterbasierten Kolbenextrusion

Lennart Waalkes

Häftad, 2023

877 kr