The radiographic control is a non-destructive method that allows you to highlight the structural defects of a material
Dendritic shrinkage of precision cast inconel
CR image of particular carbon steel
CR image of particular inconel
Radiographic inspections are generally developed to provide what is referred to as 2-2T sensitivity. This means that 2% change in thickness (again relative to the beam) will produce a measurable change in image contrast and that a void with a diameter that is 2 times (2T) that 2% thickness change will be ‘readily’ visible. However, this does not guarantee that a discontinuity of that size will be reliably detected. Again, this is dependent on signal-to-noise, which can be affected by geometry, material properties, and prior knowledge of the location and orientation of the discontinuity of interest.