发光学报, 2018, 39 (9): 1225, 网络出版: 2018-09-08  

SrAl2O4∶Eu,Ho/树脂应力发光薄膜在焊缝缺陷检测中的应用

Application of SrAl2O4∶Eu,Ho/Resin Mechanoluminescence Thin Film in Visualization Detection of Weld Seam Defects
作者单位
1 厦门理工学院 材料科学与工程学院, 福建省功能材料及应用重点实验室, 福建 厦门 361024
2 中国科学院 城市环境研究所, 福建 厦门 361021
摘要
采用高温固相法合成SrAl2O4∶Eu,Ho应力发光材料。XRD结果表明, 所合成的样品较纯, 掺杂离子并未改变基质材料的基体结构。将 SrAl2O4∶Eu,Ho(SAOEH)应力发光粉末与树脂混合制备复合应力发光薄膜。光谱结果表明, 薄膜的发光随着厚度的增加而增强; 薄膜的SEM结果表明, SAOEH粉体颗粒均匀分散在树脂中。将应力发光薄膜应用于钢板焊缝处背面, 应力测试结果表明薄膜应力发光先增强后减弱。当薄膜厚度为0.9 mm时, 应力发光最强, 且在焊缝处可得到较高的响应值。此外, 在循环测试的过程中, 应力发光薄膜可对焊板断裂实现实时响应, 结合CCD相机可实现钢板焊缝检测的可视化, 并对缺陷定位。
Abstract
Mechanoluminescence(ML) materials SrAl2O4∶Eu,Ho(SAOEH) were prepared via solid state reaction. The XRD results show that the as-prepared sample is mostly monoclinic SrAl2O4 phase. The SAOEH powder was mixed with high elastic resin to prepare ML thin film. The photoluminescent intensity of the ML film increases following the increase of film thickness. The SEM results reveal that SAOEH ML particles disperse uniformly in the resin. In order to detect the weld seam defects, the SAOEH ML film was pasted in the backside of welding steel plate. It can be found that the ML intensity in the weld region is stronger than that in any other region. In addition, the ML intensity is enhanced following the increase of film thickness and reaches the strongest when the film thickness is 0.9 mm. Furthermore, the SAOEH film can be utilized to realize a real-time response to the fracture. Combining with CCD camera, the visual detection of steel weld and location of the defect region during the cyclic test can be realized.

郑升辉, 刘亚楠, 李月婵, 付晓燕, 张洪武. SrAl2O4∶Eu,Ho/树脂应力发光薄膜在焊缝缺陷检测中的应用[J]. 发光学报, 2018, 39(9): 1225. ZHENG Sheng-hui, LIU Ya-nan, LI Yue-chan, FU Xiao-yan, ZHANG Hong-wu. Application of SrAl2O4∶Eu,Ho/Resin Mechanoluminescence Thin Film in Visualization Detection of Weld Seam Defects[J]. Chinese Journal of Luminescence, 2018, 39(9): 1225.

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