Quantification of the hydrogen produced during corrosion fatigue crack propagation

The effect of internal hydrogen on surface slip localisation on polycrystalline AISI 316L stainless steel

“…To the first order, the screening index (S) is function of temperature (T ), hydrogen atomic concentration (c), and material parameters through the coefficientˇEq. (2).…”

“…In the case of austenitic stainless steels, hydrogen uptake can lead to various kinds of degradation, depending on hydrogen content, hydrogen fugacity, and stability of the ␥ phase. During slow strain rate tests under severe electrochemical hydrogen charging, AISI 316L stainless steel suffers from a severe ductility reduction, which is associated with brittle-like intergranular and transgranular cracking [2]. The strong activity of hydrogen at the corrosion fatigue crack tip was also revealed and analysed on AISI 316L at open circuit potential in aqueous MgCl 2 [3].…”

Cracking in high performance superduplex stainless steel welds

“…Olive observed that the quantity of adsorbed and absorbed atomic hydrogen is lower than gaseous hydrogen by an order of magnitude (Olive et al, 1999). Olive observed that the quantity of adsorbed and absorbed atomic hydrogen is lower than gaseous hydrogen by an order of magnitude (Olive et al, 1999).…”

“…The hydrogen gas does not enter the alloy but bubbles out of the crack enclave (Olive et al, 1999). Production of atomic hydrogen is maximised when hydrogen recombination poisons such as sulphide (perhaps in the form H 2 S) are present (Cohen et al, 1987;Francis, 2001a).…”

Corrosion Fatigue Assessment of Bridge Cables Based on Equivalent Initial Flaw Size Model

“…Gangloff et al [21] conducted corrosion fatigue tests on steel and concluded that load factors, geometric characteristics, and environmental factors play dominant roles in corrosion fatigue. Olive et al [22] studied the hydrogen ion migration during the crack propagation of steel wires in magnesium chloride solution through corrosion fatigue tests, while Shipilov [23] believed that the crack propagation rate in a corrosive fatigue environment is related to the hydrogen ions released during crack tip extension. Based on the concept of a fracture process zone, crack propagation rate models have been established and validated.…”