Abstract: In order to reveal the mechanism of nanosecond pulsed laser cleaning of the anodic oxide film on the surface of aluminium alloy and its inte-raction characteristics, a combination of Comsol simulation and cleaning experiments was used to study the changing law of the oxide film on the surface of aluminium alloy cleaned by single-pulse and multi-pulse laser under four kinds of laser actions with powers of 20 W, 35 W, 50 W and 65 W. The results showed that the single pulse experimental cleaning area under the four power conditions was larger than the area of ablation simulation; when P=20 W, the oxide film was not destroyed, and its surface contamination carbon was removed, the remaining three power conditions under the cleaning of the surface ablation, but the experimental ablation area was smaller than that of ablation simulation. Under the thermal stress generated by the coupling of the ablation and plasma shock, the oxide film cracking and local chipping occurred. In the multi-pulse laser cleaning process, there were superposition areas caused by plasma shock and ablation, and the cleaning area and depth were larger than those of the single-pulse experimental. This study points out that there are three cleaning mechanisms in the laser cleaning process of oxide film, namely, ablation, plasma shock and thermal stress. The plasma shock area includes laser spot irradiated area and non-irradiated area, and in irradiated area, the three cleaning mechanisms work together, while in the non-irradiated area, both the plasma shock and the thermal stress are interactively coupled.
通讯作者:
* 张天刚,中国民航大学航空工程学院副教授、硕士研究生导师。2005年中国矿业大学(北京)机械电子工程专业硕士毕业后到中国民航大学工作至今,2016年天津工业大学机械设计及理论专业博士毕业。目前主要从事金属材料激光表面改性、金属材料激光再制造等方面的研究工作。在Ceramics International、Journal of Materials Engineering and Performance、Materials Characterization、Materials Letters、Lasers in Engineering、《中国激光》《光学学报》《材料工程》《航空学报》《复合材料学报》《焊接学报》《材料导报》《表面技术》《特种铸造及有色合金》和《金属热处理》等SCI、EI和中文核心期刊上以第一作者、通信作者发表相关学术论文50余篇。 113099506@qq.com
引用本文:
张天刚, 潘启越, 张志强, 曹思雨. 铝合金表面阳极氧化膜激光清洗机制分析[J]. 材料导报, 2024, 38(24): 23100128-10.
ZHANG Tiangang, PAN Qiyue, ZHANG Zhiqiang, CAO Siyu. Analysis of Laser Cleaning Mechanism of Anodic Oxide Film on Aluminium Alloy Surface. Materials Reports, 2024, 38(24): 23100128-10.
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2024, Vol. 38 
