Abstract
In a former report, the authors introduced a stochastic theory of propagation of elastic waves in porous solids, and proposed a pore response function method for nondestructive pore characterization. This study was carried out to examine the applicability of this method to quantitative detection of hydrogen attack in steels. Preparing some samples of high-carbon steel with different hydrogen exposure times, the effect of the texture damage on elastic waves was investigated. After clarifying the propagation mechanism of ultrasounds in hydrogen-attacked steel, we presented a nondestructive technique with a pore response function method for evaluating both the size and area fraction of microcracks produced by the hydrogen attack.
