Guilberteau Théo, Husson Florent, Lafargue Manon, Lopez John, Faucon Marc, Gemini Laura, Manek-Hönninger Inka
Université de Bordeaux-CNRS-CEA, CELIA UMR 5107, 33405 Talence, France.
ALPhANOV, Rue François Mitterrand, 33400 Talence, France.
Nanomaterials (Basel). 2025 Sep 1;15(17):1343. doi: 10.3390/nano15171343.
GHz-burst laser polishing is as a promising technique for improving the surface quality of metallic materials, offering key advantages over conventional methods. In this study, two distinct approaches are investigated: a single-step polishing process, and a double-step process consisting of an initial laser milling step followed by a finishing/polishing pass. This distinction is critical in evaluating the performance of GHz-burst regimes under different surface conditions and roughness levels. Initial proof-of-concept trials confirm that GHz-burst irradiation can significantly reduce the surface roughness with minimal thermal damage, provided that process parameters are carefully optimized. Further analysis of spot-to-spot overlap reveals that the deposited energy density plays a crucial role in achieving uniform surface quality without inducing surface defects. The number of passes is also studied, showing that while multiple passes can improve surface finish, the benefit strongly depends on the initial roughness state of the substrate. Scalability is demonstrated by increasing both the repetition rate and scan speed proportionally while maintaining processing quality across larger areas. These results support the viability of GHz-burst laser polishing for high-throughput manufacturing. Applications in aerospace, biomedical implants, and precision optics highlight the technique's potential for industrial adoption in demanding surface finishing contexts.
GHz 脉冲激光抛光是一种很有前途的改善金属材料表面质量的技术，与传统方法相比具有关键优势。在本研究中，研究了两种不同的方法：单步抛光工艺和由初始激光铣削步骤 followed by 精加工/抛光工序组成的两步工艺。这种区别对于评估不同表面条件和粗糙度水平下 GHz 脉冲模式的性能至关重要。初步的概念验证试验证实，只要工艺参数经过仔细优化，GHz 脉冲辐照可以在最小热损伤的情况下显著降低表面粗糙度。对逐点重叠的进一步分析表明，沉积能量密度在实现均匀表面质量而不引起表面缺陷方面起着关键作用。还研究了通过次数，结果表明，虽然多次通过可以改善表面光洁度，但这种好处在很大程度上取决于基材的初始粗糙度状态。通过按比例提高重复率和扫描速度，同时在更大面积上保持加工质量，证明了可扩展性。这些结果支持了 GHz 脉冲激光抛光用于高通量制造的可行性。在航空航天、生物医学植入物和精密光学领域的应用突出了该技术在苛刻表面处理环境中工业应用的潜力。
