Fatigue – Failure – Fracture Mechanics Methods and Analyses – Welded Joints – As Welded (AW) Condition – Weld Imperfections – Post Weld Treatment Method – Ultrasonic Impact Treatment (UIT) Method – Residual Stresses – Stress Distributions – Stress Concentration – Stress Intensity – Fracture Toughness – Threshold Stress Intensity – Fatigue Loading – Crack Growth – Crack Initiation and Propagation – Local Stresses – Fatigue Strength – Fatigue Crack Growth Behavior – Crack Shape Evolution