Abstract
Offshore and oil & gas industries have shown the interest toward the use of dissimilar metals, so there is the problem of their joining. The aim of this research activity was to analyze the fatigue behaviour of Ti6Al4V/Inconel 625 (Nickel alloy 625) welded joint, obtained by laser welding. The investigated joint was obtained including intermediate layers of Vanadium and AISI 304 stainless steel to enhance the mechanical properties. The experimental results in terms of fatigue strength demonstrated a good quality of the obtained joints. The temperature of the specimens during the fatigue tests was detected by means of an Infrared Camera for applying the Thermographic Method and assessing the fatigue strength. The value of the fatigue strength predicted by the Thermographic Method shows a good agreement with the value obtained from the traditional procedure.
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