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This research has tackled problems related to the fatigue behaviour of clad steel plates and their welded joints and compared the results obtained for the welded joints of solid stainless steel plates built up by welding. The joints consisted of T-welded joints, adding a solid stainless steel insert to the plate studied. The results obtained show that the initiation phase is the main phase of the fatigue life of these joints and that the initiation sites are preferentially located at the weld toe. The differences in fatigue behaviour found can then be linked to variations of the weld toe profile; with this in mind, the simplified welding procedure for the clad plates led to results which were not as satisfactory as the conventional procedure with elimination of the cladding at the level of the welded joint. The fatigue crack growth rate of the clad plates or plates built up by welding, firstly follows the laws of cracking propagation in the corresponding stainless steels, then corresponds to the crack growth rate of the base steels. The stainless steel/base metal interface does not play any role in the cracking kinetics.

Additional information

Authors: POYET P, UNIREC, Centre de Recherches d'Unieux, Firminy (FR);GRANGER G, UNIREC, Centre de Recherches d'Unieux, Firminy (FR);RODRIGUEZ G, UNIREC, Centre de Recherches d'Unieux, Firminy (FR)
Bibliographic Reference: EUR 11961 FR (1988) 102 pp.
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