Propagation of cracks in composite bimetallic plates under hydrogen influence

A computational model is proposed to determine the residual life of a composite bimetallic plate made of semi-infinite plates of 15Kh2MFA and 321 steels with a rectilinear crack. The plate is statically tensioned at a high temperature and under the influence of a hydrogen-containing environment by uniformly distributed forces perpendicular to the line of its placement. The model is based on the energy approach about the balance of external forces and the resulting internal energies. This model is implemented numerically. Graphical dependences of the change in the residual service life of a plate on the size of the initial crack and the influence of a hydrogen-containing environment were constructed.