RESEARCH REGARDING THE HYDROGEN DIFFUSION IN STEELS

The steel cool cracking is controlled by repartition of hydrogen in th e metal too, i.e.. by the possibility of realizing great local concent rations. The accumulation of hydrogen depends upon the existence of re versible and irreversible traps, or the possibilities of its diffusion , for different conditions of thermic gradient, stress level, the conc entration gradient, or the intensivity of the electric field. A good k nowledge about these traps is important for the elaboration of materia ls resistance to fragilization through hydrogen, as well as for the su bsequent treatment for dehydrogenation.