How Do The Izod And Charpy Tests Differ In Terms Of Specimen Configuration?

The Charpy impact test differ in specimen configuration primarily in the orientation of the specimen and the type of notch used. In the Izod test, the specimen is placed vertically, with the notch facing towards the striking edge, while in the Charpy test, the specimen is placed horizontally, with the notch facing away from the striking edge. Additionally, the size and shape of the notch may vary between the two tests. These differences in specimen configuration influence the distribution of stress and strain during impact, leading to variations in the fracture behavior and measured impact properties. Understanding these distinctions is essential for selecting the appropriate test method to assess the impact toughness of materials in different applications.