IMPACT RESISTANCE Testing

Impact resistance testing, such as Charpy and Izod impact tests, measures the amount of energy absorbed by a material during fracture. During a impact resistance test, a specimen with a notched ‘pre-crack’ is subjected to a sudden impact load. By measuring the energy absorbed as the crack lengthens, the material’s toughness and resistance to crack extension is determined. Testing is often performed at various temperatures to determine the ductile to brittle transformation temperature.

Since the occurrence of flaws is typically not avoidable, fracture toughness is an important material property. Flaws, such as cracks, voids, inclusions, weld defects or material folds may act as stress concentrators to initial a subsurface crack. Charpy impact testing is valuable in determining whether there is a danger of catastrophic failure when a material is impacted.

CAPABILITIES

• Temperature between -40° F and +500° F

• Charpy Impact Testing

• Izod Impact Testing

TEST METHODS / SPECIFICATIONS

• ASTM E23 - Notched Bar Impact Testing of Metallics