The energy required to break a notched test sample with the effect of a sudden load (impact) is measured. The fracture energy value measured per unit cross-sectional area, the fracture behavior of materials under sudden load and variable temperatures, and ductile-brittle character are determined. Brittle materials have lower fracture energies, while ductile materials have higher fracture energy.
In Charpy impact test, the notch is in the middle of the sample and the impact is applied from the back of the notch. In Izod impact test, the notch is 1/3 of the sample length and the impact is applied to the end edge of the surface with the notch.
TS EN 10045-X: Charpy impact test on metallic materials
TS EN ISO 14556: Metallic materials – Charpy V-notch pendulum impact test
TS EN ISO 9016: Destructive tests on welds in metallic materials – Impact tests – Test specimen location, notch orientation and examination
TS ISO 946, TS EN ISO 5754, ASTM E23, ASME IX, AWS, API1104