抄録
Fatigue strength of welded joints is usually much lower than that of steel plates and does not increase as the strength of steel plates. One of the principal causes of this phenomenon is the existence of tensile residual stress around a weld toe. It has been shown that the low-temperature transformation welding consumable(LTTW) that contains Cr and Ni can bring compressive stress into around weld toes. Then it can improve the fatigue strength of welded joint. In this study, the effect of LTTW on fatigue property of the non-load-carrying cruciform welded joints is investigated. As a result, it is revealed that the fatigue strength of the welded joint applied 11%Cr-9.5%Ni covered electrode was superior to conventional welded joint and it increased as the yield strength of steel plate while that of conventional welded joints was independent of yield strength of the steel plates
