C-picture

A C-image is an echo height image of a workpiece created during the ultrasonic test , a projected image of the sizes of the flaws.

There are 8 colors available in the examples on this page. Each color represents a different reflection quantity.

The disc shown is a 10 cm thick cylinder that was sounded through to the rear wall . Yellow> 0.4 mm, red> 0.6 mm and blue is greater than 0.8 mm

Green is the normal structure of the material.
- Fine, dark green.
- Less fine, light green.
Yellow is still permitted, but a good color difference to the next level, red.
Red corresponds to the first display size that has to be logged, but still does not necessarily lead to the component being rejected.
In these examples, blue in a component means reject.

On this picture you can see a bad ( inhomogeneous ) structure and large defects (blue). Here you can see a homogeneous structure , but also two places that lead to rejects. This is the enlargement of image two.

The C-scan in the multi-zone test
This test is much more accurate. The test is not permitted below 256 colors. Here one compares the color areas with each other and creates a homogeneity profile, the "SNR".