EFFECTS OF TESTING RATE ON HYDROGEN-ASSISTED FRACTURE OF FERRITIC STEELS

Conventional wisdom suggests hydrogen-assisted fracture occurs principally at slow testing rates as hydrogen requires time to diffuse to the region of elevated stress, such as the crack tip. The effects of testing rate were examined on ferritic-based steels by performing fast rate fracture tests in gaseous hydrogen at testing rates spanning four orders of magnitude.
EXTENDED ABSTRACT