Abstract:Hydrogen embrittlement (HE) in API 5L X70 steel was investigated by testing notched and unnotched uniaxial tensile specimens and single-edge tension specimen, SE(T). Apparent hydrogen diffusivity (D app = 1.4 x 10 -10 m 2 /s) and solubility (S app = 4.9 mol H/m 3 ) were determined by electrochemical hydrogen permeation tests. Through mathematical fitting, it was possible to separate the strong traps present at the beginning of the first permeation curve (φ = 0.43 mol H/m 3 ). Uniaxial tensile tests showed a lo… Show more
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