钛合金薄板直角焊缝质量的相控阵超声检测方法研究

doi:10.3901/JME.2021.12.145

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 145-152.doi: 10.3901/JME.2021.12.145

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钛合金薄板直角焊缝质量的相控阵超声检测方法研究

张婷^1,2, 陈杰^1,2

1. 中国航发商用航空发动机有限责任公司设计研发中心, 上海 200241;
2. 上海商用飞机发动机工程技术研究中心, 上海 200241

收稿日期:2020-09-25 修回日期:2021-03-01 出版日期:2021-08-31 发布日期:2021-08-31
作者简介:张婷,女,1981年出生,博士,毕业于清华大学材料科学与工程学院,现就职于中国航发商用航空发动机有限责任公司设计研发中心,高级工程师。主要研究方向为航空发动机的零部件制造检测及适航技术等。E-mail:zhangting281020@163.com
基金资助:
上海科委科研计划（19DZ1100300，18DZ2204600）和上海市经信委（2018-RGZN-02036）资助项目

Research on Phased Array Ultrasonic Testing Method for Titanium Alloy Sheet Fillet Welds

ZHANG Ting^1,2, CHEN Jie^1,2

1. Department of Discipline Engineering, AECC Commercial Aircraft Engine Co., Ltd., Shanghai 200241;
2. Shanghai Engineering Research Center of Civil Aero Engine, Shanghai 200241

Received:2020-09-25 Revised:2021-03-01 Online:2021-08-31 Published:2021-08-31

摘要/Abstract

摘要： 板直角焊接结构由于被焊试件厚度薄、检测精度要求高等因素使得常规检测方法难以施展。利用相控阵超声检测技术声束灵活可控的特点，制定基于波束控制的全覆盖检测方案。为获得较好的信噪比，提出一套楔块几何参数的优化设计方法；对采用多次反射方式入射的相控阵超声偏转聚焦法则计算方法进行了研究；构建采用机械臂作扫查器的高精度相控阵超声自动化检测系统，对具有人工预埋缺陷的钛合金薄板直角焊缝结构进行了检测试验，验证检测方法的正确性。研究结果表明，所提出的相控阵超声检测方法，能够对裂纹、未焊合等类型缺陷进行良好表征，满足薄板直角焊缝的超声无损检测要求。

关键词: 钛合金薄板, 相控阵超声检测, 直角焊缝, 裂纹缺陷, 多次反射

Abstract: Considering that the conventional non-destructive testing(NDT) method is not competent for the inspection of fillet welding structure of thin sheet with high detection accuracy, a phased array ultrasonic testing method is proposed, which has the advantage of flexible beam control. Due to the ultrasonic feature, a completely covered phased array ultrasonic testing method based on beam steering is proposed. A new method for the optimum design of geometric parameters of wedge is presented to obtain a better signal-to-noise ratio. The deflection and focusing principle calculation method by multiple reflection incidences according to Fermat's principle is studied. A phased array ultrasonic scanning system using mechanical arm was established to achi-eve the recognition of prefabricated defects, which verified the correctness of the testing method. The results show that the proposed phased array ultrasonic testing method can meet the requirement of detecting and characterizing the defects like cracks or incomplete fusion in sheet fillet welding structures.

Key words: titanium alloy sheet, phased array ultrasonic testing(paut), fillet welds, cracks, multiple reflection

中图分类号:

TB553

张婷, 陈杰. 钛合金薄板直角焊缝质量的相控阵超声检测方法研究[J]. 机械工程学报, 2021, 57(12): 145-152.

ZHANG Ting, CHEN Jie. Research on Phased Array Ultrasonic Testing Method for Titanium Alloy Sheet Fillet Welds[J]. Journal of Mechanical Engineering, 2021, 57(12): 145-152.

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钛合金薄板直角焊缝质量的相控阵超声检测方法研究

Research on Phased Array Ultrasonic Testing Method for Titanium Alloy Sheet Fillet Welds

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