Fatigue Strength Characteristics of Cast Steel Weld Joints Available to Purchase

The aim of the present paper is to investigate and compare the fatigue characteristics of weld joints in terms of S-N curve between cast steel and conventional mild steel. Two different joints such as thick butt weld joints and fillet weld joints are considered in this study. Fatigue strength of cast steel weld joints with various geometric designs are tested and compared. The fatigue life and the fatigue crack propagation characteristics are investigated by experimental and numerical methods in a systematic manner. The conventional hot spot stress, structural stress and notch stress approaches are employed for the precise interpretation of the fatigue test result of cast steel weld joints. Finally, the estimation of the fatigue limit of cast steel weld joints are attempted based on material properties and geometrical parameters. The results can be used for the efficient fatigue design of various cast steel welded joints.