Acoustic-emission method for detection of hydrogen-induced damage to steels of high-pressure boilers of thermal power plants under static loading

Autor: Skal's'kyi, V. R., Lysak, M. V., Vainman, A. B.
Zdroj: Materials Science; July 1995, Vol. 30 Issue: 4 p484-490, 7p
Abstrakt: We analyze the characteristics of acoustic emission (AE) observed in the process of mechanical testing of hydrogenated and hydrogen-free specimens of thermal power equipment in uniaxial tension and three-point bending. It is shown that, in both cases, AE signals in hydrogenated specimens appear at earlier stages of loading than in hydrogen-free specimens. We suggest the use of this phenomenon in detecting hydrogen-induced damage to steel. It is discovered that the deposition of scale on the surface of pipes makes the interpretation of received AE information much more complicated.
Databáze: Supplemental Index