For an Open-crack or Toe-crack on the weld surface, it has been identified by the Visual method and if you want its depth sizing, we recommend using an angle beam transducer with a 45-deg refraction angle. During the scan, search for and detect the crack tip at the leg 2nd of the sound path and then depth sizing using a 6dB or 20dB drop. Good luck to you!
Kỹ thuật giảm 6 dB có nghĩa rằng "khi tín hiệu chỉ thị tại 80% FSH thì giảm xuống còn 40% FSH"
Thank you. Can you please also show how to measure a depth of a crack from top surface?
For an Open-crack or Toe-crack on the weld surface, it has been identified by the Visual method and if you want its depth sizing, we recommend using an angle beam transducer with a 45-deg refraction angle. During the scan, search for and detect the crack tip at the leg 2nd of the sound path and then depth sizing using a 6dB or 20dB drop.
Good luck to you!