HYDROGEN MIGRATION IN STAINLESS-STEEL AND ALLOYS STIMULATED BY IONIZING-RADIATION

Hydrogen behaviour in stainless steel, titanium and vanadium alloys du ring ionising radiation (accelerated nitrogen ions, gamma-quanta) has been studied. It was shown that ionizing radiation stimulates intensiv e migration of hydrogen (H-migration). The cross-section of interactio n between the accelerated ions and H-atoms has been determined to be 1 0(-16) cm(2). A phenomenological model of ionisation-accelerated hydro gen migration in metals was suggested. Mechanisms of gamma- and electr on-stimulated dissociation of H-containing bonds inside a solid have b een specified as Mensel-Gomer mechanisms, Auger process electron trans fers from the therm of bond state to the therm of repulsion one, which subsequently will decay into fragments. The calculated probability of H-migration on the base of these mechanisms is in a good agreement wi th the experimental results.