The welding technology of metallic components is a critical manufacturing process due to the rapidity by which many simultaneous physical phenomena take place. In actual welding processes, these phenomena are very difficult to control in a systematic way. Undesirable effects may arise and degrade the mechanical properties of the manufactured joint. Thus, reliable and efficient nondestructive inspection techniques are required to accurately assess the integrity of the welding joints. Ultrasonic techniques are in many situations the tool of choice. In the present work we analyze the integrity of laser welded steel joints by means of an ultrasonic propagation techniques. For this purpose we determine the stress/strain field using a finite element code (SYSWELD) and study the propagation of ultrasonic pulses with the Local Interaction Simulation Approach (LISA) method [1, 2]. The results are provided in terms of snapshots of ultrasonic wave displacements.
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