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Fatigue is the weakening of a material caused by repeatedly applied loads. It is the progressive and localised structural damage that occurs when a material is subjected to repeated loading and unloading. If the loads are above a certain threshold, microscopic cracks will begin to form. Eventually a crack will reach a critical size, and the structure will fracture. Abfad’s Weld Seam Monitoring System monitors a structures vital welds and acts as an early warning indicator, allowing operators to investigate before a catastrophic failure of the structure occurs. Any structure which suffers the potential for stress and fatigue will benefit from Weld Seam Monitoring. This could be wind turbines, bridges, pressure vessel external welds, and any structure that is subjected to cyclic loading.