Bend Testing on Welded Samples
The bend test checks the ductility and crack-free nature of weld specimens under bending stress. A faulty test can lead to brittleness or insufficient strength.
Physicochemical mechanism of action
The bend test checks the mechanical deformability and crack resistance of weld specimens under a specific stress range. The material is bent around an axis to test its strength and elongation limits.
Metallurgical relevance & risks in welding
A faulty bend test can lead to insufficient strength or cracks in the weld. This can cause brittleness and safety issues in the application.
Workshop practice & instructions
For the bend test, weld specimens are bent under a specific stress range. Specimens should be at least 10 mm wide and 25 mm long. The bend is performed around an axis parallel to the weld. A faulty test shows as poor ductility or visible cracks in the specimen.