陆铭慧, 翟忠亚, 刘勋丰. 双金属涡轮结合面超声相控阵检测研究[J]. 南昌航空大学学报(自然科学版), 2018, 32(4): 46-51. DOI: 10.3969/j.issn.1001-4926.2018.04.008
引用本文: 陆铭慧, 翟忠亚, 刘勋丰. 双金属涡轮结合面超声相控阵检测研究[J]. 南昌航空大学学报(自然科学版), 2018, 32(4): 46-51. DOI: 10.3969/j.issn.1001-4926.2018.04.008
LU Ming-hui, ZHAI Zhong-ya, LIU Xun-feng. Ultrasonic Phased Array Testing of Interface Defects in Cast-in Bimetal Turbine[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(4): 46-51. DOI: 10.3969/j.issn.1001-4926.2018.04.008
Citation: LU Ming-hui, ZHAI Zhong-ya, LIU Xun-feng. Ultrasonic Phased Array Testing of Interface Defects in Cast-in Bimetal Turbine[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(4): 46-51. DOI: 10.3969/j.issn.1001-4926.2018.04.008

双金属涡轮结合面超声相控阵检测研究

Ultrasonic Phased Array Testing of Interface Defects in Cast-in Bimetal Turbine

  • 摘要: 针对双金属涡轮结合面缺陷特点以及材料超声波高衰减特性,采用收发分离超声相控阵检测方法,对结合面缺陷进行定位研究。首先根据双金属涡轮几何结构特点,建立双金属涡轮有限元仿真模型,分析相控阵超声波在双金属涡轮中的传播规律和接收端的波形。然后,设计并制作双金属涡轮试样和特定曲率的曲面探头,利用收发分离超声相控阵检测工艺对试样上的人工缺陷进行定位方法研究。研究结果表明:收发分离相控阵检测工艺定位方法准确,对结合面可以进行全覆盖检测。

     

    Abstract: Aimed at bimetal turbine joint surface defects and material ultrasonic high attenuation characteristics, an ultrasonic phased array detection technique is proposed to detect the interface defects of a double metal turbine. Firstly, a finite element model of a double metal turbine is set up, based on the geometric structure characteristics of bimetal turbine, to analyze the phased array ultrasonic wave propagate in the double metal turbine and the waveform of the receiving point. Then designing and fabricating bimetal turbine specimens and curved probes with specific curvature, the positioning of the artificial defect on the sample was studied by using a bistatic ultrasonic phased array inspection process. Experimental results show that bistatic ultrasonic phased array inspection technology can achieve full coverage detection of bimetal turbine joints with high sensitivity and high positioning accuracy.

     

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