研究目的
Developing a micro-scale laser scoring process and understanding the laser-material interaction in ultra-thin aluminium foils (160 ??m thickness).
研究成果
The study demonstrated the scalability of the scoring process using fundamental laser-material interaction parameters (FLMIP) for 70 W and 120 W lasers. The 120 W laser provided a higher ablation rate and faster scoring due to higher interaction time and pulse overlap factor. Laser energy and power density were found to control the scoring ablation depth in ultra-thin aluminium foils. The research provides insights for laser manufacturers to consider laser energy and power density while designing high power pulsed lasers for industrial applications.
研究不足
The study focused on high average power lasers for high-speed processing, limiting the comparison to 70 W and 120 W laser types. The research did not investigate various scanning strategies and depth of field (DOF) analysis, which are important for efficient material removal.
1：Experimental Design and Method Selection:
The study utilized the latest generation of nanosecond pulsed ?bre lasers manufactured by SPI Lasers for scoring ultra-thin aluminium foils. The research focused on comparing 70 W and 120 W laser types to understand laser functionality and scalability of the process.
2：Sample Selection and Data Sources:
160 ??m thick flat aluminium alloy AA5182 foils were used. The chemical composition of the aluminium alloy was provided.
3：List of Experimental Equipment and Materials:
SPI-G4 Yb-doped nanosecond pulsed ?bre lasers (70 W EP-Z and 120 W EP-S), beam expanding collimator (BEC) F75, F-theta lens of 163 mm focal length, fast-speed galvanometric scanner Scanlab intelliScanIII, Laser Quality Monitor (LQM) PRIMES, LED illumination 3D microscope - Leica DM4000 M LED, scanning electron microscopy (SEM).
4：Experimental Procedures and Operational Workflow:
Score lines were produced on aluminium foils by a single laser pass with 5 s time interval between subsequent scores. The laser beam was scanned using a galvanometric scanner controlled by LaserDESK scanner software. Beam quality measurements were carried out to determine the focal position and beam quality.
5：Data Analysis Methods:
The scoring depth was correlated with specific point energy and energy density. Microscopic examination of the specimens cross-sections was carried out using the LED illumination 3D microscope. SEM was used to produce micrographs of the scribe’s top surface.
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