Investigation on the mechanical degradation of a steel line pipe due to hydrogen ingress during exposure to a simulated sour environment

Chattoraj, I; Tiwari, Sidharth; Ray, Ashok K; Mitra, A.; Das, Swapan Kumar

doi:10.1016/0010-938x(95)00001-z

Cited by 17 publications

(2 citation statements)

References 4 publications

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“…So far, investigations on the HIC of steel have primarily been focused on the formation process of cracks including theoretical analysis [5][6][7]. However, little attention has been given to the healing process of cracks induced by hydrogen charging.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-induced cracking and healing behaviour of X70 steel

Dong

Liu

et al. 2009

Journal of Alloys and Compounds

101

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Section: Introductionmentioning

confidence: 99%

Hydrogen-induced cracking and healing behaviour of X70 steel

Dong

Liu

et al. 2009

Journal of Alloys and Compounds

101

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“…7,16,17) Grain boundaries can increase hydrogen diffusion providing fast diffusion paths 18) or they can reduce the mobility of hydrogen sites acting as reversible hydrogen trapping sites at nodes and connecting points. 19) As a result of these traps, solubility is inversely proportional to the effective diffusion coefficient 20) so that a material with a greater number of traps could be less susceptible to HIC, 21,22) thus proper selection of the traps can control the hydrogen content and distribution. 23) In short, hydrogen diffusion in steel is influenced by two factors: a) a difference of chemical activities and b) hydrogen traps (grain boundaries, solute atoms, voids, inclusions, precipitates, phases and dislocations).…”

Section: Hydrogen Diffusivity In the Welding Zone Of Two High Strengtmentioning

confidence: 99%

Hydrogen Diffusivity in the Welding Zone of Two High Strength Experimental Microalloyed Steels

et al. 2015

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Using permeation tests, determination of hydrogen trapping and microhardness measurements, the effect of the microstructure on the hydrogen diffusivity was analyzed in the welding zone of two highstrength experimental microalloyed steels called M1 steel, with a martensite and bainite microstructure and M2 steel with a quasi-polygonal ferrite (QPF), acicular ferrite (AF) and martensite-austenite (M/A) microstructure. Determination of the diffusivity was performed using electrochemical permeation tests, and hydrogen traps were determined with the silver decoration technique.One-pass welds without filler material were simulated with the Gas Tungsteng Arc Welding (GTAW) process, and samples of the welding zone were collected: base material (BM), heat affected zone (HAZ) and fusion zone (FZ). A Devanathan and Stachurski type electrochemical cell was constructed to conduct permeation tests. From the microstructural analysis, the permeation testing and silver decoration, it was observed that the hydrogen diffusivity decreases with the increase in traps, promotion of the formation of the M/A microconstituent and AF and the reduction of martensite and bainite microconstituents. The lower diffusivity of all zones of both steels is presented by the BM of M2 steel, which is associated with a QPF, AF and M/A microstructure and low microhardness. The highest relative amount of traps are in the coarse grained heat affected zone (CGHAZ) of both steels, however because these are reversible traps, these subzones could be the most susceptible to hydrogen induced cracking (HIC).

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Carbide-free Bainite/Martensite (CFB/M) Duplex Phase Steel

Bai

2009

Ultra-Fine Grained Steels

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Investigation on the mechanical degradation of a steel line pipe due to hydrogen ingress during exposure to a simulated sour environment

Cited by 17 publications

References 4 publications

Hydrogen-induced cracking and healing behaviour of X70 steel

Hydrogen-induced cracking and healing behaviour of X70 steel

Hydrogen Diffusivity in the Welding Zone of Two High Strength Experimental Microalloyed Steels

Carbide-free Bainite/Martensite (CFB/M) Duplex Phase Steel

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