![Evaluation of the surface cracks depth in the metal products](/images/aplications/cracks_evaluation/evaluation_of_the_surface_cracks_depth_in_the_metal_products.jpg)
Both the manufacture defects – the ones that appear in the process of production – and in-service defects of fatigue type may develop (fig.1) in various metal products. The cracks may develop at different angles to the surface growing to considerable depths thus causing the threat of a product breaking when in service.