Scanning electron microscopy of hydrogen-exposed 304 stainless steel bending fatigue samples Conference Paper uri icon

abstract

  • Bending fatigue samples were plasma cut and water jet cut from sheets of 304 stainless. Samples were exposed to high pressure hydrogen (138 MPa at 300C for three weeks) or 1 atm hydrogen at room temperature for one week, or were unexposed. Preliminary results from bending fatigue testing show a decrease in fatigue life for hydrogen supersaturated samples. The present investigation shows SEM fractographic imaging from fatigue samples for each of the hydrogen exposure populations. Samples that were not exposed to hydrogen preliminarily appear to show fatigue striations on fractographic images. The ongoing research seeks to discern a difference in failure surfaces between hydrogen-exposed and unexposed samples.

author list (cited authors)

  • Phillips, M., McLaughlin, K., Ojeda, D., Luna, E., Burke, M., Cruz, P., ... Ferro, P. D.

publication date

  • January 2014