Hydrogen embrittlement of high strength steel under in situ corrosive charging conditions and tensile load

Scharf, Roland; Muhr, Andreas; Stellnberger, Karl-Heinz; Faderl, Josef; Holzer, Christoph; Mori, Gregor

doi:10.1002/maco.201508655

Cited by 11 publications

(8 citation statements)

References 20 publications

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“…The here‐observed hydrogen‐induced expansion of ≈11% is by far too large to be accommodated by elastic deformation, whether in the bulk or thin film, and the swelling must be accompanied by plastic deformation . This is consistent with reported hydrogen‐induced embrittlement . Severe local structural disruption of the protective passive layer induced by swelling is also a plausible explanation for the reported hydrogen‐induced diminished resistance to pitting corrosion …”

Section: Resultssupporting

confidence: 86%

Swelling of Steel Film by Hydrogen Absorption at Cathodic Potential in Electrolyte

Garai

Carlomagno

Solokha

et al. 2020

Physica Status Solidi (b)

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An ≈4 nm FeCrNi film, deposited on a Ru/B4C multilayer (ML), is used to study cathodic hydrogen charging in electrolyte. A thin film on a ML allows obtaining precise quantitative information on surface metal composition and oxidation state using the X‐ray standing wave technique combined with near‐edge X‐ray absorption spectroscopy. The metal composition is found being close to the composition of stainless steel (SS) 304, and, as for bulk steel, the outer 2 nm passive layer, consisting of oxidized iron and chromium, is depleted of nickel. Overall, it is found that the film represented a useful replica of the surface of bulk steel. Following exposure to 0.1 m KCl electrolyte at −0.6 V versus Ag/AgCl, 11.3 (±3)% swelling of the film by hydrogen absorption is observed. The estimated absorbed amount is exceeding reported bulk absorption under similar conditions by more than an order of magnitude. Strong hydrogen absorption appears to be enabled by the 2D character of the thin film, i.e., a significantly lower associated strain energy compared with bulk absorption. The strong surface swelling is suggested to be related to the lowering of the pitting corrosion resistance of SS surfaces reported following hydrogen exposure.

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Section: Resultssupporting

confidence: 86%

Swelling of Steel Film by Hydrogen Absorption at Cathodic Potential in Electrolyte

Garai

Carlomagno

Solokha

et al. 2020

Physica Status Solidi (b)

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“…A greater hydrogen concentration thereby increased the hydrogen influence. This was consistent with the fact that Scharf et al [54] found that zincgalvanized high-strength steels possessed higher hydrogen concentrations, and consequently lower resistance to hydrogen induced delayed fracture when immersed in a NaCl solution.…”

Section: Qpsupporting

confidence: 88%

Evaluation of the influence of hydrogen on some commercial DP, Q&P and TWIP advanced high-strength steels during automobile service

Liu

Zhou

Venezuela

et al. 2018

Engineering Failure Analysis

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The hydrogen influence was evaluated (A) for laboratory conditions with hydrogen concentrations larger than in service, and (B) at substantial loading rates to simulate a crash. Hydrogen in the studied laboratory conditions caused minimal influence for 980DP and 1200DP, and some influence for 980DP-650YS, 980DP-700YS, 980QP and 950TW. Simulated crash situations caused some influence for 980DP, 980QP and 950TW; their properties quickly reverted after the end of hydrogen charging. Two new mechanisms are proposed: (i) hydrogen enhanced macroscopic plasticity (HEMP) decreasing the yield stress, and (ii) hydrogen assisted micro-fracture (HAM) decreasing ductility at fracture at the ultimate tensile strength.

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“…Based on the research of Scharf et al [50] a hydrogen content of approximately 1.2 wt. ppm is sufficient to cause embrittlement of a ferritic-martensitic high-strength dual-phase steel that is loaded at 80% of its YS.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Uptake and Embrittlement of Carbon Steels in Various Environments

Trautmann

Mori

Oberndorfer³

et al. 2020

Materials

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To avoid failures due to hydrogen embrittlement, it is important to know the amount of hydrogen absorbed by certain steel grades under service conditions. When a critical hydrogen content is reached, the material properties begin to deteriorate. The hydrogen uptake and embrittlement of three different carbon steels (API 5CT L80 Type 1, P110 and 42CrMo4) was investigated in autoclave tests with hydrogen gas (H2) at elevated pressure and in ambient pressure tests with hydrogen sulfide (H2S). H2 gas with a pressure of up to 100 bar resulted in an overall low but still detectable hydrogen absorption, which did not cause any substantial hydrogen embrittlement in specimens under a constant load of 90% of the specified minimum yield strength (SMYS). The amount of hydrogen absorbed under conditions with H2S was approximately one order of magnitude larger than under conditions with H2 gas. The high hydrogen content led to failures of the 42CrMo4 and P110 specimens.

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Hydrogen embrittlement of high strength steel under in situ corrosive charging conditions and tensile load

Cited by 11 publications

References 20 publications

Swelling of Steel Film by Hydrogen Absorption at Cathodic Potential in Electrolyte

Swelling of Steel Film by Hydrogen Absorption at Cathodic Potential in Electrolyte

Evaluation of the influence of hydrogen on some commercial DP, Q&P and TWIP advanced high-strength steels during automobile service

Hydrogen Uptake and Embrittlement of Carbon Steels in Various Environments

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