ASTM E23
Full Name
ASTM E23 – Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
Scope
ASTM E23 is a widely used standard method for determining the impact resistance of metallic materials. This test involves striking a notched specimen with a known energy and measuring the amount of energy absorbed during the fracture.
Key aspects of the ASTM E23 standard include:
- Specimen preparation: the specimen is prepared with a specific geometry and notch configuration, which can vary depending on the material and application.
- Impact testing: the specimen is struck with a pendulum-type impact tester, which has a known energy. The energy absorbed during the fracture is measured.
- Impact energy: the impact energy is reported in units of joules or foot-pounds.
- Test temperature: the test can be conducted at different temperatures, including ambient temperature, elevated temperatures, or sub-zero temperatures.
Impact testing is essential for evaluating the following properties of metallic materials:
- Toughness: the ability of a material to absorb energy before fracturing.
- Brittleness: the tendency of a material to fracture suddenly without significant plastic deformation.
- Temperature sensitivity: the variation of impact resistance with temperature.
Resources
Keywords
impact testing; notched bar; metallic materials; specimen preparation; impact energy; toughness; brittleness; temperature sensitivity; pendulum-type impact tester; joules; foot-pounds; ambient temperature; elevated temperature; sub-zero temperature; failure analysis; quality control; research