Fatigue Strength Improvement of Non-Load Carrying Type Fillet Welded Joint by The Low-Temperature Transformation Welding Wire

Abstract

The application of the low-temperature transformation welding wire was introduced for the improvement of fatigue strength of boxing welded joints. This welding wire induces the compressive residual stress at the welded toe. In this study, the applicability of the low-temperature transformation welding wire was investigated to improve fatigue strength of non-load carrying type fillet welded joint. The measurements of residual stress and fatigue tests wetre carried out using test specimens. It is shown that the compressive residual stress at the welded toe is induced with the use of this wire. As a result, fatigue strength of welded joint is about twice lager than that of the convention joints.