Characterization of hydrogen induced cracking in TRIP-assisted steels

Laureys, Aurélie; Depover, Tom; Petrov, Roumen; Verbeken, Kim

doi:10.1016/j.ijhydene.2015.06.017

Cited by 68 publications

(19 citation statements)

References 38 publications

(67 reference statements)

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“…Therefore, this H is able to embrittle the material locally, leading to failure initiation and a further accelerated fracture propagation from the edge onwards. These findings were also observed for in-situ H charged tensile specimens of DP and TRIP steel [4,5,9], on which H induced failure initiation and propagation was evaluated by electron backscattered diffraction and scanning electron microscopy analysis.…”

Section: Tensile Tests Done Under Static Conditionssupporting

confidence: 61%

“…Essentially, in the presence of H, these materials undergo a large ductility loss, mainly referred to as hydrogen embrittlement (HE). Amongst others, DP, transformation induced plasticity (TRIP) and high strength low alloyed (HSLA) steels are widely used grades in the automotive industry and were therefore already subject of numerous H related research [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Effect of strain rate on the hydrogen embrittlement of a DP steel

et al. 2018

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Advanced high strength steels (HSSs), such as dual phase steels, are widely used in the automotive industry due to their excellent combination of strength and ductility. In certain applications, they might be exposed to hydrogen (H) which is known to be detrimental for the deformation. H embrittlement (HE) is still not fully understood. It might drastically reduce the energy absorbed in a crash event and limits the use of HSSs in car bodies. Although H diffusion is a highly time dependent phenomenon, so far, the combined effect of dynamic strain rates and electrochemical H pre-charging has not been studied. Therefore, a reproducible methodology has been developed. Tensile specimens were electrochemically H pre-charged and immediately tested in a split Hopkinson tensile bar setup. To distinguish between the effect of strain rate and HE, static tests have been conducted using the same procedure. Results show that the HE resistance decreased due to higher H amounts in the sample for all strain rates. The HE increased when slower strain rates were applied due to higher probability of H to diffuse to regions of stress concentration ahead of a crack tip and as such accelerating failure. At the highest strain rate considered (900 s-1), the material still lost about 10% of its ductility.

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Section: Tensile Tests Done Under Static Conditionssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Effect of strain rate on the hydrogen embrittlement of a DP steel

et al. 2018

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“…Moreover, the crack propagated into the center with hydrogen diffusion, regardless of the welding method [23]. Since the crack propagation at the specimen center was promoted by external load and was more rapid than hydrogen diffusion, DF was observed in the center of the specimen [24]. Therefore, the HIC failure behavior was mostly the same, regardless of the welding method.…”

Section: Resultsmentioning

confidence: 97%

Hydrogen-Induced Cracking of Laser Beam and Gas Metal Arc Welds on API X65 Steel

Lee¹,

Kim

Park

et al. 2019

Korean J. Met. Mater.

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Hydrogen-induced cracking (HIC) behavior was analyzed for gas metal arc (GMA) and laser beam (LB) welds on American Petroleum Institute (API) X65 steel. The GMA welds consisted of acicular ferrite (AF) with some widmanstatten ferrite (WF), while the LB welds had bainitic ferrite (BF) with some AF. The welds and heat affected zone (HAZ) of GMA exhibited a hardness of 220-250 HV, while those of the LB had a hardness of 230-290 HV. The LB welds and HAZ exceeded the hardness limit of 250 HV for pipeline steel, defined by the National Association of Corrosion Engineers (NACE) standard. Slow strain rate tests (SSRT) were performed in air and in-situ with hydrogen to observe HIC behavior. The ultimate tensile strength of the GMA welds decreased by 13%, while that of the LB welds decreased by 16% after hydrogen charging. Both welds showed a dimple fracture in the center and quasi-cleavage fracture along the edges. When austenite transforms to BF, it is known to grow along the directions of twins or the Kurdjumov-Sachs relation. These directions are strongly related to the coincidence site lattice, specifically Σ3 and Σ13b, and have good crack resistance. Because of this grain boundary characteristic, the LB welds with a BF microstructure showed good HIC behavior compared to the GMA welds.

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“…As a mixture of corrosion and crack growth deterioration in structural steel, Hydrogen-Induced Cracking (HIC) has been present in the cable wires of many suspension bridges [1][2][3][4][5][6][7][8][9]. Because it may become the primary cause underlying abrupt failure of structural systems, HIC of cable wires is a critical issue in cable-supported structures.…”

Section: Introductionmentioning

confidence: 99%

Bayesian Correlation Prediction Model between Hydrogen-Induced Cracking in Structural Members

Cho

Delgado-Hernández

Lee

et al. 2017

Metals

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Background: A quantitative model was developed and applied for analyzing the correlation between hydrogen-induced corrosion cracking in both main cable wires and degraded stiffening of the girders of a cable suspension bridge, considering maintenance effects across time and space. Method: Bayesian inference is applied for predicting the correlations among the wires in the main cables owed to hydrogen-induced cracking (HIC) in the cable wires of a steel bridge, by using the improved hierarchical Bayesian models proposed here. Results: The simulated risk prediction under decreased strength of cable wires, due to the corrosion cracking, yields posterior distributions based on prior distributions and likelihoods. The Bayesian inference model can be applied to the design and maintenance of highly corroded and correlated components Data are updated through analyzed information from previous crack steps. A numerical example including not only reliability indices but also probabilities of failure for cable wires, damaged by HIC, is then presented. Compared with a conventional linear prediction model, the one herein developed provides highly improved convergence and closeness to the analyzed data. Conclusion: The proposed model can be used as a diagnostic or prognostic prediction tool for the performance of corroded bridge cable wires with crack propagation, allowing the development of maintenance plans for mechanical components and the overall structural system.Metals 2017, 7, 205 2 of 17 of appropriate rehabilitation methods, to the location of damaged members, and to the identification of maintenance tasks. Therefore, this piece of research introduces HIC and a method for quantifying the deterioration of steel members in structural systems.Corrosion reactions often result in the formation of hydrogen gas. Hydrogen atoms can either diffuse or be absorbed into the lattice of the metal, leading to the deterioration of material properties. This, combined with the stress applied to the metal, can result in crack propagation. Diffused hydrogen atoms can recombine to form hydrogen molecules, which can exert pressure on the surrounding steel, resulting in the crack propagation in wires under high tensile stress [3,4].Such corrosion can happen under exposure to carbonated and bicarbonated, caustic, nitrate, cyanide, anhydrous ammonia (liquid), mixture of nitric and sulfuric acid, mixture of magnesium chloride and sodium fluoride, or CO/CO 2 /H 2 O mixtures, and under hydrogen attack. Some mechanisms have been proposed in the literature for explaining the phenomenon; these can be classified as either anodic Stress Corrosion Cracking (SCC) mechanisms or mechanical fracture processes. Anodic SCC involves the rupture of the protective oxide layer at the crack tip, anodic dissolution of the base metal, and crack growth under constant stress. Crack growth in turn can be intergranular or transgranular [10].Another similar concept is that a film is formed on a metal surface, and brittle fracture follows due to dealloying or vacancy inj...

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Characterization of hydrogen induced cracking in TRIP-assisted steels

Cited by 68 publications

References 38 publications

Effect of strain rate on the hydrogen embrittlement of a DP steel

Effect of strain rate on the hydrogen embrittlement of a DP steel

Hydrogen-Induced Cracking of Laser Beam and Gas Metal Arc Welds on API X65 Steel

Bayesian Correlation Prediction Model between Hydrogen-Induced Cracking in Structural Members

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