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

被引：1

作者：

Shapovalov, Oleg ^{[1
]}

Heckel, Thomas ^{[2
]}

Gaal, Mate ^{[2
]}

Weiss, Sabine ^{[1
]}

机构：

[1] Brandenburg Univ Technol BTU Cottbus Senftenberg, Cottbus, Germany

[2] BAM Fed Inst Mat Res & Testing, Berlin, Germany

来源：

ACOUSTICS AUSTRALIA | 2022年 / 50卷 / 03期

关键词：

Ultrasonic testing; High temperature; Acoustical damping; Angle wedge; Ultrasonic probe;

D O I：

10.1007/s40857-022-00270-9

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

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 mu s of signal propagation.

引用

页码：343 / 353

页数：11

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