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作 者:杨文锋[1] 何双江 李绍龙 李天权 YANG Wen-feng;HE Shuang-jiang;LI Shao-long;LI Tian-quan(Civil Aircraft Composite Materials Research Center,Civil Aviation Flight University of China,Guanghan 618307,China)
机构地区:[1]中国民用航空飞行学院民机复合材料研究中心,四川广汉618307
出 处:《激光与红外》2023年第6期869-874,共6页Laser & Infrared
基 金:四川省科技厅重点研发项目(No.2021YFSY0025)资助。
摘 要:漆层的损伤形貌反映了激光与材料相互作用的规律及除漆机理,了解不同光束类型对漆层的损伤特征及作用规律有助于选择激光精准除漆,提高表面处理质量。为探究不同光束类型对漆层材料的作用规律及除漆机理,采用扫描电子显微镜和3D光学表面轮廓仪测量铝合金表面漆层在高斯与平顶激光除漆后,损伤直径、损伤深度及损伤形貌随能量密度的变化。结果表明,在高斯光束作用下,表面漆层损伤区域受到热烧蚀和热振动效应影响,出现漆层剥离、烧蚀去除等现象,损伤凹坑光滑、规则,当能量密度为1237J/cm2时,漆层的损伤直径达到4671μm,深度达到1014μm;在平顶光束作用下,表面漆层损伤区域主要受到热振动效应影响,损伤凹坑呈现出振动剥离去除的形貌,凹坑范围内的漆层剥落不规则,剖面呈“锯齿”状,当能量密度为1237J/cm2时,损伤直径达到6123μm,深度达到1942μm;同等能量密度下,平顶光束剥离漆层量更大。The damage morphology of the paint layer reflects the law of laser material interaction and the mechanism of paint removal.Understanding the damage characteristics and the law of action of different beam types on the paint layer helps to select the laser for precise paint removal and improve the quality of surface treatment.To investigate the action law of different beam types on the paint layer material and the mechanism of paint removal,scanning electron microscope and 3D optical surface profiler are used to measure the variation of damage diameter,damage depth and damage morphology with energy density of aluminum alloy surface paint layer after Gaussian and flat top laser paint removal or the aluminum alloy surface.The results show that the surface paint damage area is affected by thermal ablation and thermal vibration effects under the action of Gaussian beams,and the phenomenon of paint peeling and ablation removal appears,and damage crater is smooth and regular.When the energy density is 12.37J/cm2,the damage diameter of the paint layer reaches 46.71μm and the depth reaches 10.14μm;under the action of the flat top beam,the surface paint damage area is mainly affected by the thermal vibration effect,and the damage crater shows the shape of vibration peeling removal,and the paint layer within the crater is irregularly peeling,and the profile is"jagged";when the energy density is 12.37 J/cm2,the damage diameter reaches 612.3μmand the depth reaches 19.42μm;at the same energy density,the flat top beam peels off a larger amount of paint layer.
分 类 号:TN249[电子电信—物理电子学] TP73[自动化与计算机技术—检测技术与自动化装置]
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