Fatigue strength of normal and high strength steel joints improved by weld profiling

While some post-weld treatment techniques increase the fatigue life mainly due to induced compressive residual stress others are trying create a smooth transition at weld toes. One of latter is profiling. This study investigates effect profiling for four different steel types from S355 S900 including one duplex stainless-steel and performs comparison with high frequency mechanical impact (HFMI) treatment. The observed strength improvement significantly higher than typically assumed such comparable increases HFMI further parent material only slightly below estimated material. Finally, design curves proposed that include an increasing materials, but still conservative low quality.