External Acoustical Damping on a Metallic Angle Wedge in a High Temperature Resistant Ultrasonic Probe

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2022-07-08 DOI:10.1007/s40857-022-00270-9

Oleg Shapovalov, Thomas Heckel, Mate Gaal, Sabine Weiß

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Abstract

Ultrasonic probes for high-temperature applications are provided with metallic wedges, which can withstand the contact with the high temperature of the inspected structure. The ultrasonic signal travels within the wedge and gets reflected from its boundaries, causing interference signals called “ghost echoes”. The current work presents an investigation of the additional damping effect provided by porous sintered metal plates applied onto the surface of the wedge. In particular, the study evaluates the effect of damping plate thickness on the interference signal level at different transmission frequencies. Damping plates made of sintered metal SIKA-R 15 AX were attached to a wedge prototype made of steel 1.4301. The study revealed, that the most effective thickness of damping plates in the selected frequency interval of 1 to 4 MHz is equal to 4 mm. The evaluation of the interference signal has shown that the application of such damping plates to the wedge surface contributes to an additional attenuation of an interference signal of 10 to 30 dB after 500 µs of signal propagation.

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耐高温超声探头金属角楔的外声阻尼

用于高温应用的超声波探头配有金属楔，可以承受与被检测结构的高温接触。超声波信号在楔形内传播，并从其边界反射，产生被称为“鬼回声”的干扰信号。目前的工作提出了一个额外的阻尼效应的研究，提供了多孔烧结金属板施加到楔的表面。特别地，研究了阻尼板厚度对不同传输频率下干扰信号电平的影响。由烧结金属SIKA-R 15ax制成的阻尼板附着在1.4301钢制成的楔形原型上。研究表明，在所选择的1 ~ 4 MHz频率区间内，阻尼板的最有效厚度为4 mm。对干扰信号的评估表明，在信号传播500µs后，将这种阻尼板应用于楔形表面有助于对干扰信号进行10到30 dB的额外衰减。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

期刊介绍： Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.

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