High-speed observation of melt pool-vapor interactions in long-pulsed laser ablation of metals

  • Laser ablation of metals can be performed using cost-effective and efficient continuous wave fiber lasers using the fast power modulation capabilities of these beam sources. Single-pulse laser ablation of steel with pulse durations in the microsecond to millisecond time scale is observed using a high-speed camera setup to investigate the dynamic interactions between the generated melt pool and the vapor phase. Distinct processing regimes were identified depending on the pulse duration, temporal pulse shape, and power density. Pulse durations in the microsecond range can lead to beneficial processing conditions for ablation processes. In this regime, phase explosion and dynamic melt expulsion by melt uplift and coaxial droplet ejection due to the rapid drop in vapor pressure after the laser pulses were observed as desirable mechanisms, leading to effective material removal and high processing quality with little melt adhesion.

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Metadaten
Author:Andreas SchkutowORCiD, Johanna BreitORCiD, Thomas FrickORCiD
DOI:https://doi.org/10.2351/7.0001866
Parent Title (English):Journal of Laser Applications
Publisher:AIP Publishing
Place of publication:Melville, NY
Document Type:Article
Language:English
Date of first Publication:2025/12/10
Reviewed:Begutachtet/Reviewed
Release Date:2026/01/13
Tag:Laser ablation; Laser applications; Laser drill; Laser micromachining; Liquid-vapor interface; Surface micromachining
Volume:38
Issue:1
Article Number:012012
institutes:Fakultät Maschinenbau und Versorgungstechnik
Institut für Chemie, Material- und Produktentwicklung
Research Themes:Materialien & Produktionstechnik
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