离焦量对铝合金表面激光除漆损伤特性的影响
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四川省科技计划项目(No.2021YFSY0025,2019YFG0311);中国民用航空飞行学院科研基金(No.J2019-078,BJ2016-02);中国民用航空飞行学院成果转化与创新基金项目(No.CJ2019-03);中国民用航空飞行学院重点项目(No.ZJ2021-04);研究生科研创新基金项目(No.X2021-6);大学生创新创业训练计划项目(No.S202010624080)资助。


Effect of defocus on damage characteristics oflaser paint removal on aluminum alloy surface
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    摘要:

    飞机激光除漆时铝合金基体保护及除漆效率与材料损伤阈值密切相关,而激光离焦量的变化将直接改变材料的损伤阈值,以及除漆效率。采用ISO 11254 1 on 1激光损伤阈值测试方法研究不同离焦量时的铝合金和漆层的损伤阈值,对激光单脉冲光斑的二维、三维形貌进行分析,将理论值与实测值得到的不同离焦量时的损伤凹坑直径及深度进行验证。结果表明:随激光离焦量增加,光斑面积增大的同时材料损伤阈值下降,可有效提升能量利用率及除漆效率;实际单脉冲作用的材料凹坑深度随离焦量的增大而减小,且面积增大;凹坑深度、凹坑直径的理论值、实测值具有较好的相关性,并从激光材料作用机理角度对其误差进行了解释说明。

    Abstract:

    When aircraft laser paint is removed,the aluminum alloy substrate protection and paint removal efficiency are closely related to the material damage threshold,and the change of the laser defocus will directly change the material damage threshold and the paint removal efficiency.The ISO 11254 1 on 1 laser damage threshold test method is adopted to study the damage threshold of aluminum alloy and paint at different defocusing amounts.The two dimensional and three dimensional morphologies of the laser single pulse spot are analyzed,and the theoretical value and the actual value are compared.The diameter and depth of the damage craters at different defocusing amounts were verified.The results show that with the increase of the laser defocus,the spot area increases while the material damage threshold decreases,which can effectively improve the energy utilization and paint removal efficiency.The actual single pulse action of the material crater depth decreases with the increase of the defocus,and the area increases.The theoretical and measured values of crater depth,crater diameter show a good correlation,and the errors are explained from the perspective of the action mechanism of laser materials.

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杨文锋,付婵媛,钱自然,曹宇,张华忠,李天权,朱德华,李绍龙.离焦量对铝合金表面激光除漆损伤特性的影响[J].激光与红外,2022,52(6):849~855
YANG Wen-feng, FU Chan-yuan, QIAN Zi-ran, CAO Yu, ZHANG Hua-zhong, LI Tian-quan, ZHU De-hua, LI Shao-long. Effect of defocus on damage characteristics oflaser paint removal on aluminum alloy surface[J]. LASER & INFRARED,2022,52(6):849~855

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  • 在线发布日期: 2022-06-24