Abstract
A predicting method of low cycle fatigue life in the dissimilar metal electron beam welded joint (DMEBWJ) at an elevated tempreature was proposed by representing the cyclic softening and hardening behaviors of base metals. The DMEBWJs between A387, Gr. 22 steel and SUS 405 steel, and between A387, Gr. 22 steel and SUS 316 steel were used. The estimated variations of strain distribution in the DMEBWJs with the strain cycling were well consistent with the experimental results. The predicted fatigue lives of DMEBWJs were also in good agreement with the experimental results, except for the case that the heat affected zone with low hardness was formed in the DMEBWJ.
