Issue |
JNWPU
Volume 39, Number 6, December 2021
|
|
---|---|---|
Page(s) | 1281 - 1288 | |
DOI | https://doi.org/10.1051/jnwpu/20213961281 | |
Published online | 21 March 2022 |
The damage effect of weld seam and groove area of titanium alloy with ceramic laser resistant coating
陶瓷抗激光涂层对钛合金焊缝及凹槽区域的防护效果研究
1
Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China
2
School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
3
China Airborne Missile Academy, Luoyang 471009, China
Received:
20
March
2021
In order to explore the effect of weld area and groove structure on the damage effect of laser irradiation on titanium alloy and ceramic coating, the experiment of continuous laser irradiation on welding seam and groove area of titanium alloy was studied, while the surfaces of the specimens were coated with or without anti-laser ceramic material. The following conclusions were obtained: the ceramic coating can protect the titanium alloy substrate from the damage of high power laser effectively; the laser resistance of ceramic coating on the welding seam area is weakened, but it still protects the titanium alloy effectively; the damage of laser on the edge and the corner structure of titanium alloy with groove structure is aggravated with the increasing of laser power density, and under the same laser density, the damage inside the groove is less than that outside, while that of corner is less than edge. Micromorphology results show that the ceramic coating undergoes a series of physical and chemical changes and phase transformation to absorb a large amount of thermal energy converted from luminous energy, which has a protective effect on the titanium alloy.
摘要
为探究焊缝区域以及凹槽结构对钛合金基材激光毁伤效果以及陶瓷涂层抗激光效果的影响,采用对比实验法研究了钛合金表面存在和不存在陶瓷抗激光涂层2种情况下,连续激光对钛合金焊缝区域以及凹槽区域的毁伤效果,结果表明,陶瓷涂层能够有效减轻钛合金基底的激光毁伤效果。焊缝区域陶瓷涂层抗激光性能减弱,但仍能进行有效抗激光防护。凹槽结构的棱部、角部的激光毁伤效果随激光功率密度的增加而加重,在相同激光功率密度条件下,凹槽结构内部毁伤效果明显较外部毁伤效果小,角部结构毁伤效果较棱部结构小。高反射型陶瓷涂层在反射部分激光能量后,会吸收大量由激光辐照产生的热能,发生烧结作用导致内部结构变化,从而对钛合金基底起到保护作用。
Key words: laser damage / ceramic coating / welded seam / groove structure / titanium alloy
关键字 : 激光毁伤 / 陶瓷涂层 / 焊缝区域 / 凹槽结构 / 钛合金
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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