研究目的
Investigating the influence of several Al laser ablation parameters on joint strength of laser welded Al – polyamide (PA6.6) assemblies.
研究成果
Laser ablation parameters have a strong influence on the joint area and quality, but no impact on the joint stress at failure. Optimal laser ablation parameters were identified at a spot size of 45 μm, along with a peak pulse power of ≈ 4.75 kW and an overlap ratio of ≈ 68%.
研究不足
The influence of the laser ablation parameters on the joint strength and failure behavior was not investigated in depth. Further characterization of the surfaces after fracture and discussion of its link with failure mode and shear strength of the assembly are beyond the scope of this study.
1：Experimental Design and Method Selection:
A design of experiments (DoE) approach was adopted to investigate the influence of several Al laser ablation parameters on joint strength.
2：Sample Selection and Data Sources:
Materials used were
3：5 mm thick EN-AW1050A aluminum and 4 mm polyamide 6 (PA6). List of Experimental Equipment and Materials:
Short-pulsed (ns) Nd:YVO4 laser (TruMark 6130 from TRUMPF), fiber laser (TruFiber 400 from TRUMPF), Z010 machine from Zwick/Roell for shear tests, Leica DM4000 microscope, and a digital FUJIFILM X-Pro2 camera.
4：Experimental Procedures and Operational Workflow:
Al surface was ablated using laser, followed by laser welding of Al and PA
5：Joint strength was quantified by means of a single-lap shear test. Data Analysis Methods:
Analysis of Variance (ANOVA) was employed to determine the reliability of the developed model and the significance of its coefficients.
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