@inproceedings{5731867c49164bf795b042e9289afec2,
title = "Stress corrosion cracking and crack tip characterization of alloy X-750 in boiling water reactor environments",
abstract = "The stress corrosion cracking susceptibility of Inconel alloy X-750 in the HTH heat-treated condition has been evaluated in high-purity water @ 93 and 288°C under Normal Water Chemistry (NWC) and Hydrogen Water Chemistry (HWC) conditions. SCC crack growth rates of approximately 1.2×10-7 mm/s (K=28 MPa√m) under NWC conditions and 1.4×10-8 mm/s (K=28 MPa√m) under HWC conditions in 288°C high-purity water were observed. The alloy was also tested in HWC at 93°C. No SCC crack growth was observed at K= 35 MPa√m for the 525 h of testing at 93°C. At 288°C the fracture mode transitioned from predominantly transgranular cracking under fatigue conditions to intergranular cracking under constant stress intensity for both environments. Atom Probe Tomography (APT) was used to characterize the crack tip and ahead of the crack tip. The results suggest that oxygen diffuses ahead of the crack tip along specific crystallographic directions.",
keywords = "Alloy X-750, Atom probe tomography, Corrosion potential, Crack growth rate, Crack tip characterization, Hydrogen water chemistry, Normal water chemistry, Stress corrosion cracking",
author = "Gibbs, {J. P.} and Ballinger, {R. G.} and Jackson, {J. H.} and Dieter Isheim and H. H{\"a}nninen",
year = "2011",
month = jan,
day = "1",
language = "English (US)",
isbn = "9781622761944",
series = "15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011",
publisher = "John Wiley and Sons Inc.",
pages = "705--720",
booktitle = "15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011",
address = "United States",
note = "15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011 ; Conference date: 07-08-2011 Through 11-08-2011",
}