解説
アミン応力腐食割れ先端領域の挙動と超音波スペクトロスコピー法による測定に関する研究
2017 年 66 巻 9 号 p. 661-666
詳細
2017 年 66 巻 9 号 p. 661-666
In conventional linear ultrasonic flaw detection method, since an ultrasonic wave incident on a steel material is excited at an interface having a difference in acoustic impedance, opening crack can be detected. However, the backscattered waves at ultrasonic spectroscopy method (noise) is the most suitable for detecting and evaluating precursory minute defect size of deterioration damage to equipment along with aging of amine stress corrosion cracking. This approach focuses on power spectrum intensity of a specific frequency band, to grasp precursor behavior by comparing area values of the power spectral intensity is confirmed with an actual device, and thus life expectancy can be predicted.
