TY - GEN A1 - Shapovalov, Oleg A1 - Heckel, Thomas A1 - Gaal, Mate A1 - Weiß, Sabine T1 - External Acoustical Damping on a Metallic Angle Wedge in a High Temperature Resistant Ultrasonic Probe T2 - Acoustics Australia N2 - 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. KW - Ultrasonic Testing KW - High temperature KW - Acoustical damping KW - Angle wedge KW - Ultrasonic probe Y1 - 2022 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/29094 UR - https://link.springer.com/article/10.1007/s40857-022-00270-9 SN - 1839-2571 VL - 50 IS - 3 SP - 343 EP - 353 ER -