研究目的
To investigate the effects of different laser powers and cleaning speeds on the surface properties of 5A12 aluminum alloy, including surface roughness, microstructure, element content, microhardness, residual stress, and corrosion resistance, and to determine the optimal laser cleaning parameters.
研究成果
Laser cleaning effectively removes the oxide film and impurities from the surface of 5A12 aluminum alloy, improving surface smoothness and strength. The optimal cleaning parameters were found to be a power of 98 W and a cleaning speed of 4.1 mm/s. However, the process reduces magnesium content and corrosion resistance, and generates residual tensile stress on the surface. High energy density can improve corrosion resistance but may damage the matrix, making it unsuitable for practical applications.
研究不足
The study focused on the effects of laser cleaning on the surface properties of 5A12 aluminum alloy under specific conditions. The findings may not be directly applicable to other aluminum alloys or different cleaning environments. The study also noted a decrease in magnesium content and corrosion resistance after cleaning, which could be areas for further optimization.
1：Experimental Design and Method Selection:
The study used an acousto-optic Q-switched diode-pumped Nd:YAG laser to clean 5A12 aluminum alloy samples. The effects of different laser powers (50, 88, 98, 104, 110 W) and cleaning speeds (20.7, 10.4, 6.9, 5.2, 4.1, 3.5, 3.0, 2.6, 1.7, 1.0 mm/s) on the surface properties were investigated.
2：7, 4, 9, 2, 1, 5, 0, 6, 7, 0 mm/s) on the surface properties were investigated.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: 5A12 aluminum alloy samples of size 10 mm × 10 mm × 4 mm were used. The chemical composition of the alloy was provided.
3：List of Experimental Equipment and Materials:
Medium-power and high-energy laser-diode-pumped pulsed solid-state laser cleaning equipment (SC200W–350 KW), white light interferometer (MFT-4000), super depth of field digital microscope (VH-2500R), scanning electron microscopy (JSM-7610F), micro-Vickers hardness tester (402-MVD), X-ray residual stress analyzer (iXRDCOMBO), and potentiostat (CHI604E) were used.
4：Experimental Procedures and Operational Workflow:
The laser energy density was controlled by changing the power and cleaning speed. Surface roughness, microstructure, element content, microhardness, residual stress, and corrosion resistance were measured and analyzed.
5：Data Analysis Methods:
The data were analyzed to determine the effects of laser cleaning parameters on the surface properties of the aluminum alloy.
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