“…By now, number of accidents due to specified metal condition is still large, regardless the significant success in study of mechanisms of the fatigue processes and development of methods for increase of life duration of the welded metal structures. Therefore, specific practical interest is paid to investigation of the processes and reasons reducing life duration of the materials under service conditions, in particular, with regard to fatigue damage of the structures, which is evidenced by publications of the recent years [3][4][5][6][7].…”