Premium
Inhibitory effect of oxygen on hydrogen‐induced fracture of A333 pipe steel
Author(s) -
Komoda Ryosuke,
Kubota Masanobu,
Staykov Aleksandar,
Ginet Patrick,
Barbier Francoise,
Furtado Jader
Publication year - 2019
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12994
Subject(s) - hydrogen , oxygen , hydrogen embrittlement , materials science , impurity , embrittlement , metallurgy , inorganic chemistry , chemistry , organic chemistry
The effect of oxygen contained in hydrogen gas environment as an impurity on hydrogen environment embrittlement (HEE) of A333 pipe steel was studied through the fracture toughness tests in hydrogen gases. The oxygen contents in the hydrogen gases were 100, 10, and 0.1 vppm. A significant reduction in the J ‐Δ a curve was observed in the hydrogen with 0.1‐vppm oxygen. Under given loading conditions, the embrittling effect of hydrogen was completely inhibited by 100 vppm of oxygen. In the case of the hydrogen with 10‐vppm oxygen, initially the embrittling effect of hydrogen was fully inhibited, and then subsequently appeared. It was confirmed that 1‐vppm oxygen reduced the embrittling effect of hydrogen. The results can be explained by the predictive model of HEE proposed by Somerday et al.