不同入射角和脉冲下青铜的 NS 单点激光烧蚀研究

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Esmaeil Ghadiri Zahrani, Bahman Azarhoushang
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引用次数: 0

摘要

要将这一成果推广到非垂直照射的体烧蚀领域,就必须从根本上了解不同入射角的烧蚀情况。迄今为止,在体积激光加工领域还没有进行过这种方向的研究。在这项研究中,使用了不同通量的纳秒激光进行单点烧蚀实验。评估了 0°、30° 和 60°入射角对烧蚀深度和凹坑几何形状的影响。还考虑了不同的激光脉冲数。结果表明,0° 和 30° 角的烧蚀深度在初始脉冲时几乎处于相同的范围内,但之后,入射角为 30° 的烧蚀深度大幅下降。随着入射脉冲数的增加,烧蚀深度先是近似线性增长,然后呈指数增长。将入射角度从 0° 改为 60°,影响区域也会发生变化。影响区域可分为两个不同的区域:(1) 烧蚀区域 (A.A),在最初的 20 个脉冲中,陨石坑的烧蚀深度迅速增加,然后随着更多入射脉冲的到来,烧蚀深度不再增加,并由于烧蚀深度的增加而达到一个高点。第二个区域(2)是陨石坑的热影响区域(H.A.A),在这里不会发生进一步的烧蚀,但由于热量积累,当更多入射脉冲撞击陨石坑时,该区域会不断变大。在最初的入射脉冲(最多 10 个)中,热影响区域几乎保持不变,在急剧增加之后,随着入射脉冲数增加到 70 个,热影响区域逐渐扩大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of NS-single-point laser ablation of bronze under different incidence angles and pulses
A fundamental understanding of ablation in different incidence angles is indispensable to expand the result to volume ablation where nonperpendicular irradiation exists. So far, no study with this orientation has been conducted in the category of volume laser machining. In this study, a nanosecond laser with different fluencies was utilized for single-point ablation experiments. The effect of incidence angles of 0°, 30°, and 60° on the ablation depth and the crater geometry was evaluated. Different laser pulse numbers are also considered. The results show that the ablation depth for 0° and 30° angles is almost in the same range for the initial pulses, but afterward, the ablation depth for the incidence 30° drops considerably. As the number of incident pulses increases, the ablation depth first develops approximately linearly and then grows exponentially. By changing the incident from 0° to 60°, the affecting area changes as well. The affecting area could be categorized into two distinct areas: (1) ablation area (A.A) where the crater ablation depth rapidly increases for the first 20 pulses and then, as more incident pulses arrive, it does not grow anymore and reaches a plateau due to the increase in the ablation depth. The second area (2) is the heat-affected area (H.A.A) of the crater where no further ablation occurs, but due to heat accumulation, it becomes constantly bigger when more incident pulses strike the crater. This heat-affected area tends to stay almost constant for the first incident pulses (up to 10) and, after a sharp increase, tends to enlarge steadily as the number of incident pulses rises to 70.
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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