钛合金二维扫描激光超声检测方法研究

发布时间：2018-04-05 15:04

本文选题：激光超声　切入点：二维扫描　出处：《压电与声光》2017年01期

【摘要】：钛合金材料缺陷危害性大,须进行健康状况监测。激光超声检测技术具有非接触、快速、高效等优点,可以满足钛合金结构的实时健康监测。该文研究了激光热弹激发超声应力的机理,在分析一维扫描激光超声检测效率的基础上,构建了非接触式二维扫描激光超声检测系统,用于钛合金结构健康状况的实时在线检测。实验结果表明,激光超声检测技术能有效用于钛合金结构健康检测;该系统可同时实现两个方向检测,相同条件下,检测效率较一维扫描提高约50%;实验装置简单,易于实现完全非接触式检测,可满足钛合金结构在工程实践中的实时在线检测,且可进行缺陷的定位检测。
[Abstract]:The defect of titanium alloy is harmful, so it is necessary to monitor the health condition.Laser ultrasonic detection technology has the advantages of non-contact, fast and high efficiency, which can meet the real-time health monitoring of titanium alloy structure.In this paper, the mechanism of laser thermoelastic excited ultrasonic stress is studied. Based on the analysis of the efficiency of one-dimensional scanning laser ultrasonic detection, a non-contact two-dimensional scanning laser ultrasonic testing system is constructed.It is used for real-time and on-line detection of the health status of titanium alloy structures.The experimental results show that the laser ultrasonic testing technique can be effectively used in the health detection of titanium alloy structure, and the system can simultaneously realize two directions detection. Under the same conditions, the detection efficiency is about 50% higher than that of one-dimensional scanning, and the experimental device is simple.It is easy to realize the complete non-contact detection, can satisfy the real-time on-line detection of titanium alloy structure in engineering practice, and can be used to locate the defects.
【作者单位】：西安工程大学机电工程学院;武警工程大学装备工程学院;
【基金】：国家自然科学基金资助项目(51305458)
【分类号】：TG115.28;TN249

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