Hydrogen embrittlement of an automotive 1700 MPa martensitic advanced high-strength steel

Venezuela, Jeffrey; Lim, Fang Yan; Liu, Li; James, Sonia; Zhou, Qingjun; Knibbe, Ruth; Zhang, Mingxing; Li, Huixing; Dong, Futao; Dargusch, Matthew S.; Atrens, Andrej

doi:10.1016/j.corsci.2020.108726

Cited by 50 publications

(10 citation statements)

References 58 publications

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“…No correlation is observed between D and S V , indicating that PAGs are not effective diffusion paths for hydrogen. D has been reported to be in the range of ~1 × 10 −6 to 8 × 10 −7 cm 2 /s [50,51] in a similar environment for predominantly martensitic steels with similar mechanical properties as the steels investigated here. This similarity validates the effect of PAG structures further.…”

Section: Hydrogen Permeationsupporting

confidence: 61%

“…Diffusion coefficient tends to decrease with the increased mechanical strength of martensite. Martensite has the highest density of dislocations and grain boundary interfaces among bcc microstructures which lead to greater hydrogen trapping [50,51]. The microstructure (excluding PAG size and morphology), and the mechanical properties such as tensile strength and hardness are relatively similar within this study.…”

Section: Hydrogen Permeationmentioning

confidence: 61%

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Influence of Prior Austenite Grain Structure on Hydrogen-Induced Fracture in As-Quenched Martensitic Steels

et al. 2022

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Section: Hydrogen Permeationsupporting

confidence: 61%

Section: Hydrogen Permeationmentioning

confidence: 61%

Influence of Prior Austenite Grain Structure on Hydrogen-Induced Fracture in As-Quenched Martensitic Steels

et al. 2022

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“…In recent years, the application of high-strength steels has been promoted for the purpose of further weight reduction and safety improvement in transportation equipment such as automobiles, buildings, and structures. However, hydrogen embrittlement susceptibility increases with increasing strength of steels, and a lathmartensitic steel is particularly susceptible to hydrogen embrittlement [1][2][3][4][5] . Typical fracture morphologies are intergranular (IG) fracture along prior austenite (γ) grain boundaries [6][7][8][9] and quasi-cleavage (QC) fracture [9][10][11][12][13][14][15][16] that occurs along the block/lath boundary or {011} slip plane of the body-centered cubic lattice, and each fracture mechanism may be different.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Crack Initiation Sites and Main Factors Causing Hydrogen Embrittlement of Tempered Martensitic Steels with Different Carbide Precipitation States

2024

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The dependence of crack initiation sites and main factors causing hydrogen embrittlement fracture on carbide precipitation states has been investigated for tempered martensitic steels with the same tensile strength of 1450 MPa. Notched specimens charged with hydrogen were stressed until just before fracture and subsequently unloaded. The crack initiation site exhibited intergranular (IG) fracture at 21 m ahead of the notch tip as observed by scanning electron microscopy (SEM) for 0.28% Si specimens with plate-like carbide precipitates on prior austenite () grain boundaries. This crack initiation site corresponded to the vicinity of the maximum principal stress position as analyzed by a finite element method (FEM). The initiation site corresponded to the triple junction of prior  grain boundaries as analyzed by electron backscattered diffraction (EBSD). In contrast, the crack initiation site exhibited quasi-cleavage (QC) fracture at the notch tip for 1.88% Si specimens with fine and thin carbide particles in the grains. This crack initiation site corresponded to the maximum equivalent plastic strain site obtained by FEM. Additionally, the crack initiated on the inside of prior  grain boundaries and propagated along the {011} slip plane with higher kernel average misorientation (KAM) values as analyzed by EBSD. These findings indicate that differences in carbide precipitation states changed the crack initiation sites and fracture morphologies involved in hydrogen embrittlement depending on mechanical factors such as stress and strain and microstructural factors.

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“…Due to the practical needs of lightweight vehicles, it is exceptionally urgent to develop 1400 MPa-grade high-strength bolt steel. However, metallic materials’ hydrogen embrittlement (HE) is modest in modern industry, especially in high-strength steel [ 2 , 3 ]. An efficient approach to increasing steel’s resistance to HE is by adding alloying elements [ 4 , 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo Content on Hydrogen Evolution Reaction of 1400 MPa-Grade High-Strength Bolt Steel

Xiong

Song

et al. 2023

Materials

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The effect of Mo content of 1400 MPa-grade high-strength bolt steel on hydrogen diffusion behavior and the hydrogen evolution reaction were studied using a hydrogen permeation experiment, potentiodynamic polarization tests, thermal desorption spectroscopy, and the first-principle calculation. Two 1400 MPa-grade high-strength bolt steels with different Mo content were used. Based on the potentiodynamic polarization tests, both steels’ electrochemical behavior was similar in the test range. The hydrogen permeation experiment showed that the process of hydrogen adsorption and absorption was significantly promoted, and hydrogen desorption and recombination were slightly promoted, with the Mo content increasing from 0.70 to 1.09 wt%. The thermal desorption spectroscopy showed the overall reaction of hydrogen permeation and evolution. The increasing Mo content facilitated hydrogen entry behavior and increased the hydrogen content. According to the first-principle calculation and the density functional theory, this phenomenon is induced by the stronger bonding ability of Mo-H than Fe-H. This work could guide the design of 1400 MPa-grade high-strength bolt steel.

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Hydrogen embrittlement of an automotive 1700 MPa martensitic advanced high-strength steel

Cited by 50 publications

References 58 publications

Influence of Prior Austenite Grain Structure on Hydrogen-Induced Fracture in As-Quenched Martensitic Steels

Influence of Prior Austenite Grain Structure on Hydrogen-Induced Fracture in As-Quenched Martensitic Steels

Comparison of Crack Initiation Sites and Main Factors Causing Hydrogen Embrittlement of Tempered Martensitic Steels with Different Carbide Precipitation States

Effect of Mo Content on Hydrogen Evolution Reaction of 1400 MPa-Grade High-Strength Bolt Steel

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