Stress-induced hydrogen redistribution and corresponding fracture behavior of Q960E steel at different hydrogen content

Kan, Bo; Wu, Weijie; Yang, Zixuan; Li, Jinxu

doi:10.1016/j.msea.2020.138963

Cited by 27 publications

(4 citation statements)

References 51 publications

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“…The irreversible traps can reduce hydrogen mobility toward stress concentration regions ahead of the crack tip, 92 not contributing to a significant change in fracture toughness values in the charged samples. On the contrary, in reversible traps, the hydrogen diffuses to the region with the higher strain or stress 93 . Hence, hydrogen mobility toward the crack tip contributes to a lower toughness value in charged samples 92 .…”

Section: Resultsmentioning

confidence: 99%

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The effect of hydrogen on the fracture toughness of friction‐stir welded API 5L X70 pipeline steels

Giarola

Ávila

Cintho

et al. 2022

Fatigue Fract Eng Mat Struct

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The hydrogen embrittlement (HE) leads to severe steel degradation of mechanical properties. The hydrogen atoms diffuse into the steel and get positioned into reversible and irreversible trap sites. The pipe to transport oil and gas needs to be welded to construct long‐distance pipeline projects; thus, friction‐stir welding (FSW) has proven an excellent alternative to joining these pipelines. Therefore, this work assessed and analyzed the influence of hydrogen on the microstructure and fracture toughness of API 5L X70 steel welded by friction‐stir welding. The in‐service conditions were simulated by charging the specimen electrolytically in a 3.5% NaCl water solution with an intensity current of 2 mA·cm−2. According to fracture toughness tests, the base metal (BM) was more affected by hydrogen embrittlement than the friction‐stir zone (SZ), with a fracture toughness reduction of 20% after hydrogen charging. The SZ fracture toughness did not statistically show changes in hydrogen charging by the used times; however, the fracture mechanism changed from ductile to brittle‐like after 4 days of charging. The SZ depicted a better fracture toughness than BM due to the bainitic microstructure, a significant amount of irreversible hydrogen trapping.

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Section: Resultsmentioning

confidence: 99%

“…On the contrary, in reversible traps, the hydrogen diffuses to the region with the higher strain or stress. 93 Hence, hydrogen mobility toward the crack tip contributes to a lower toughness value in charged samples. 92 The type of trap is related to the bonding energy with hydrogen.…”

Section: F I G U R E 6 the Fracture Morphology Of The Fsw Api X70 Ste...mentioning

confidence: 99%

The effect of hydrogen on the fracture toughness of friction‐stir welded API 5L X70 pipeline steels

Giarola

Ávila

Cintho

et al. 2022

Fatigue Fract Eng Mat Struct

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“…Hydrogen diffusion under external loading has been experimentally studied in literature. [39,175] In PHS, this effect may be more pronounced due to the residual stress and service loading. Progress in modeling stress-driven hydrogen diffusion has been made by Sofronis and McMeeking.…”

Section: Hydrogen Diffusionmentioning

confidence: 99%

Hydrogen Embrittlement Evaluation and Prediction in Press‐Hardened Steels

Cao

Wang

Ngiam

et al. 2023

steel research int.

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The application of press-hardened steels (PHSs) in automotive body-in-white components using the hot-stamping technique is growing thanks to its impressive strength and formability. Unfortunately, hydrogen embrittlement (HE), an issue that generally exists in high-strength steels, impedes the PHSs rising application trend by causing catastrophic mechanical property degradation. Thus, detailed evaluation and prediction of HE risk throughout PHSs manufacture and service condition are necessary. This study highlights techniques to characterize the hydrogen content and distribution, techniques to evaluate HE susceptibility, and potential models to simulate the in-service performance of PHS. The survey of existing studies has revealed the gaps between laboratory measurement and industry application, including but not limited to 1) the accelerated experiment-induced discrepancies against real-life applications, 2) a selection of the appropriate HE indicators, 3) an accurate risk prediction model, and 4) efficient feedback to the industry based on both experimental and simulated results. Based on the review, future studies are expected to establish a conclusive HE evaluation standard for PHS.

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“…The martensitic lattice is highly stressed and has a lower solubility for hydrogen and a ferritic-austenitic mixed lattice has the problem of high solubility in the austenitic phase and the ferritic phase is in direct contact with high hydrogen concentrations at phase boundaries. As a result, the threshold hydrogen contents for HISCC of high-strength carbon steels are in the range of 1-3 wt.-ppm [20][21][22]. Hydrogen threshold values for austenitic stainless steels are usually between 10 and 50 wt.-ppm, whereas the values for martensitic and duplex stainless steels can be significantly lower [3,11,23].…”

Section: Introductionmentioning

confidence: 99%

Cathodic and Anodic Stress Corrosion Cracking of a New High-Strength CrNiMnMoN Austenitic Stainless Steel

Truschner

Deutsch

Mori

et al. 2020

Metals

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A new high-nitrogen austenitic stainless steel with excellent mechanical properties was tested for its resistance to stress corrosion cracking. The new conventional produced hybrid CrNiMnMoN stainless steel combines the excellent mechanical properties of CrMnN stainless steels with the good corrosion properties of CrNiMo stainless steels. Possible applications of such a high-strength material are wires in maritime environments. In principle, the material can come into direct contact with high chloride solutions as well as low pH containing media. The resistance against chloride-induced stress corrosion cracking was determined by slow strain rate tests and constant load tests in different chloride-containing solutions at elevated temperatures. Resistance to hydrogen-induced stress corrosion cracking was investigated by precharging and ongoing in-situ hydrogen charging in both slow strain rate test and constant load test. The hydrogen charging was carried out by cathodic charging in 3.5 wt.% NaCl solution with addition of 1 g/L thiourea as corrosion inhibitor and recombination inhibitor to ensure hydrogen absorption with negligible corrosive attack. Slow strain rate tests only lead to hydrogen induced stress corrosion cracking by in-situ charging, which leads to total hydrogen contents of more than 10 wt.-ppm and not by precharging alone. Excellent resistance to chloride-induced stress corrosion cracking in 43 wt.% CaCl2 at 120 °C and in 5 wt.% NaCl buffered pH 3.5 solution at 80 °C is obtained for the investigated austenitic stainless steel.

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Stress-induced hydrogen redistribution and corresponding fracture behavior of Q960E steel at different hydrogen content

Cited by 27 publications

References 51 publications

The effect of hydrogen on the fracture toughness of friction‐stir welded API 5L X70 pipeline steels

The effect of hydrogen on the fracture toughness of friction‐stir welded API 5L X70 pipeline steels

Hydrogen Embrittlement Evaluation and Prediction in Press‐Hardened Steels

Cathodic and Anodic Stress Corrosion Cracking of a New High-Strength CrNiMnMoN Austenitic Stainless Steel

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