搅拌摩擦焊缝变入射角超声检测方法研究

基金项目:

国家“10.5”规划总装备部预研项目(18HK625—517)

详细信息

Investigation of Ultrasonic Method Based on Different Incident Angles for Evaluation of Friction Stir Welding

摘要: 研究采用变入射角超声反射法解决搅拌摩擦焊缝区不同取向缺陷的无损检测。通过计算分析超声波在焊缝区的声波入射角、缺陷取向和缺陷紧贴性对声波反射影响，确定入射声波的角度变化范围，通过改变入射角，获取入射声波在缺陷处的最佳声学反射方向，提高入射声波对不同取向缺陷的检出能力。检测结果表明，该法可以有效地检出铝合金搅拌摩擦焊缝区不同取向焊接缺陷，是解决搅拌摩擦焊缝区微细和紧贴型缺陷无损检测的一种可行的方法。
- 超声检测 /
- 搅拌摩擦焊 /
- 变入射角反射
Abstract: A new ultrasonic method, which is based on reflection of spot-focused beam with different incident angles, for evaluation of defects in aluminum alloy friction stir welding(FSW) has been investigated. The relationship of incident angles, possible defect directions and thickness of defects in FSW with reflective coefficient has been used to analyze and estimate scanning incident angle range of probe beam. The optimum ultrasonic reflection direction can be obtained during the scanning of incident angles. It is helpful to improve detectability of defects in FSW. The experimental results presented have shown that ultrasonic evaluation based on multiple-incident angles has potential usage in nondestructive inspection of FSW.
- Ultrasonic inspection /
- Friction stir welding /
- Multiple-incident reflection

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