粉体カップリングを用いた超音波探傷試験法とそのエンジニアプラスチックへの応用

概要

論文の詳細を見る
A new powder immersion method has been developed where the water of conventional immersion testing methods is replaced with powder. In this method, ultrasonic testing is carried out on test pieces while immersing them in pressurized powder. Even though the powder usually prevents the transmission of elastic waves, they can be transmitted through it under pressurized conditions. In addition, the acoustic impedance can be controlled by controlling the pressure applied to the powder. We were able to match the acoustic impedance of the powder and the test pieces by controlling the pressure of the powder. The advantage of this is that when the acoustic impedance of the powder and the test pieces match, the reflection of the electric waves from the surface of the test piece is greatly reduced. We applied this powder immersion method to the testing of engineering plastics, and the echos from the surfaces of the test pieces almost completely disappeared by controlling the pressure of the powder. This method is not confined to engineering plastics and can be applied to other materials.
一般社団法人日本非破壊検査協会の論文
2013-05-01