Hydrogen Embrittlement of Austenitic Stainless Steels with Ultrafine-Grained Structures of Different Morphologies

Астафурова, Е. Г.; Melnikov, E.; Астафуров, С. В.; Ratochka, I. V.; Мишин, И. П.; Maier, Galina; Moskvina, Valentina; Zakharov, Gennady; Smirnov, A. I.; Батаев, В. А.

doi:10.1134/s1029959919040076

Cited by 29 publications

(8 citation statements)

References 20 publications

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“…The mitigation of hydrogen-induced ductility loss by ultrafine grain refinement has been found in 304 metastable austenitic stainless steel [7]. Astafurova et al [8] concluded that the highly defective grain-subgrain microstructure with the high dislocation density alleviates hydrogen embrittlement effects in UFG Cr-Ni-Mo and Cr-Ni-Ti steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of equal-channel angular pressing (ECAP) and current density of cathodic hydrogen charging on hydrogen trapping in the low-alloy steel

et al. 2020

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Owing to the outstanding mechanical properties, the steels and other metallic materials with the ultra-fine grained (UFG) microstructure obtained by severe plastic deformation (SPD) techniques such as equal channel angular pressing (ECAP) have been in the spotlight of the material science and engineering community over the last few decades. Nevertheless, the data on environmental effects such as stress-corrosion cracking and hydrogen embrittlement (HE) on the performance of the UFG ferritic steels is still limited and is awaiting for clarification and thorough comprehensive examination. In the present study, the effect of the current density of cathodic hydrogen charging on the hydrogen concentration and state in the ECAPed and as-received low-carbon steel grade 09G2S has been investigated by the hot-extraction gas-analysis. It is found that due to the increased dislocation density and the total length (or volume fraction) of grain boundaries the ECAPed steel occludes much more hydrogen than its as-received counterpart at the same hydrogen charging conditions. Besides, the hydrogen concentration in the ECAPed steel is significantly changed at current densities below 20 mA / cm 2 only and is not affected by hydrogen-induced cracking. In contrast, the non-monotonous growth of the hydrogen concentration in the as-received steel occurs at the increasing current density up to 340 mA / cm 2 and is controlled by the extent of hydrogen-induced damage.

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Section: Introductionmentioning

confidence: 99%

Effect of equal-channel angular pressing (ECAP) and current density of cathodic hydrogen charging on hydrogen trapping in the low-alloy steel

et al. 2020

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“…Central parts of the Hcharged specimens possess trangranular fracture mode with the formation of dimples on the fracture surfaces for both types of the steel. This fracture micromechanism is typical for austenitic stainless steels [12]. In both steels, H-assisted brittle layers exhibit predominantly trangranular fracture mode (quasicleavage).…”

Section: Mechanical Properties and Fracture Mechanismsmentioning

confidence: 66%

The Effect of Hydrogen-Charging on Mechanical Properties of Austenitic CrNi Steel Fabricated by Wire-Feed Electron Beam Additive Manufacturing

et al. 2021

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A comparative study of the mechanical properties, fracture mechanisms and hydrogen embrittlement peculiarities was carried out using the specimens of austenitic CrNi steel produced by two different methods: wire-feed electron beam additive manufacturing and conventional casting followed by solid-solution treatment. Hydrogen-induced reduction of ductility and the increase in the yield strength are observed in steel specimens produced by both methods. Despite hydrogen embrittlement index is comparable in them, the increase in the yield strength after hydrogen-charging is different: 25 MPa for cast steel and 175 MPa for additively manufactured steel. This difference is associated with the peculiarities of phase composition and phase distribution in steels produced by different methods.

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“…Несмотря на количественные различия в глубине Данные пластические характеристики косвенно отражают способность к пластической деформации поверхностных слоев, диффузионной зоны и матрицы образцов. Пластические характеристики в матрицах для ТМО-1 и ТМО-2 образцов достаточно сильно отличаются, что находится в соответствии с данными на растяжение: крупнокристаллические образцы способны деформироваться до удлинения в 55 %, а образцы с зеренно-субзеренной структурой разрушаются после 8 % пластической деформации [22]. Данные на рис.…”

Section: Loading Diagrams Of Austenitic Steel Specimens After Treatunclassified

The investigation of strength and plasticity characteristics of composite layers in austenitic stainless steel subjected to ion-plasma treatment using the nanoindentation method

Zagibalova¹,

Moskvina²,

Астафуров³

et al. 2020

Vektor nauki Tol'yattin. gos. univ.

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Hydrogen Embrittlement of Austenitic Stainless Steels with Ultrafine-Grained Structures of Different Morphologies

Cited by 29 publications

References 20 publications

Effect of equal-channel angular pressing (ECAP) and current density of cathodic hydrogen charging on hydrogen trapping in the low-alloy steel

Effect of equal-channel angular pressing (ECAP) and current density of cathodic hydrogen charging on hydrogen trapping in the low-alloy steel

The Effect of Hydrogen-Charging on Mechanical Properties of Austenitic CrNi Steel Fabricated by Wire-Feed Electron Beam Additive Manufacturing

The investigation of strength and plasticity characteristics of composite layers in austenitic stainless steel subjected to ion-plasma treatment using the nanoindentation method

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