Using a pulsed electric current to reduce the susceptibility of high-strength steel to the stress corrosion cracking caused by hydrogen

Ma, Rui; Xiang, Siqi; Zhang, Hexiong; Zhang, Xinfang

doi:10.1016/j.ijhydene.2020.01.055

Cited by 23 publications

(1 citation statement)

References 44 publications

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“…[26] Rahnama and Qin [27] found that electropulsing at 10.18 A/mm 2 with 50, 100, and 1000 pulses was able to dissolve the initial austenite/ferrite steel's texture, which formed in prior thermomechanical processing, and produce an alternative texture. Ma [28] treated the high-strength steel at a current density of 5 A/mm 2 electropulsing for 2 hours. It was found that the hydrogen atoms were decoupled by electropulsing, which reduced the susceptibility of stress corrosion cracking.…”

Section: Introductionmentioning

confidence: 99%

Effects of Electropulsing Treatment on Microstructure and Properties of Cemented Carbide (WC-15Co)

Liao

Yang

et al. 2020

Metall Mater Trans A

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Electropulsing treatment (EPT) is a promising postprocessing method to optimize microstructure. In the present work, the EPT was applied to treat cemented carbide (WC-15Co). The electropulse-induced microstructural evolution in WC-15Co was investigated. Compared with the untreated sample, the transverse rupture strength and electrical resistance of the treated sample were reduced. However, there was no significant change in the scanning electron microscopy (SEM) microstructure. Therefore, electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were carried out to detail the microstructural evolution. This process revealed that electropulsing could promote the recrystallization and the transition of e-Co to a-Co, as well as the evolution of microstructure. In addition, the dislocations in the treated sample were significantly fewer than those in the untreated sample.

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Section: Introductionmentioning

confidence: 99%

Effects of Electropulsing Treatment on Microstructure and Properties of Cemented Carbide (WC-15Co)

Liao

Yang

et al. 2020

Metall Mater Trans A

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Experimental and Fractographic Study of the Hydrogen‐Induced Cracking of 45CrNiMoVA Martensitic Advanced High‐Strength Steel

Li,

Liu

2024

steel research int.

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Hydrogen‐induced cracking (HIC) in high‐strength 45CrNiMoVA steel is investigated using smooth and notched cylindrical specimens by performing uniaxial tensile tests. Specimens with different notch geometries are used to analyze the interacting effects of the stress concentration factor and HIC micromechanism. The results show that hydrogen charging reduces the elongation at fracture and the ultimate tensile strength of smooth tensile specimens. The microscopic fracture mode changes from ductile dimples with some quasicleavage fracture without hydrogen to a mixture of brittle quasicleavage and intergranular cracking with hydrogen. For notched specimens with a lower notch root radius, significant stress concentration occurs at the notch root, which enriches hydrogen in these highly stressed regions. This causes a lower notch tensile strength and greater susceptibility to hydrogen embrittlement. Microfracture observations show that the area fraction of the intergranular cracking surface increases gradually, and the brittle zone moves farther away from the notch root upon decreasing the notch root radius, causing the embrittlement index to remain high. These results will help determine the applicability of existing steel for hydrogen service and also provide guidance for developing new high‐strength martensitic steels that can resist hydrogen embrittlement.

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Gradient phase transformation of Al–Zn–Mg–Cu alloy induced by nonlinear interface wetting under electromagnetic shocking treatment

Sun,

Liu,

et al. 2023

J Mater Sci

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Using a pulsed electric current to reduce the susceptibility of high-strength steel to the stress corrosion cracking caused by hydrogen

Cited by 23 publications

References 44 publications

Effects of Electropulsing Treatment on Microstructure and Properties of Cemented Carbide (WC-15Co)

Effects of Electropulsing Treatment on Microstructure and Properties of Cemented Carbide (WC-15Co)

Experimental and Fractographic Study of the Hydrogen‐Induced Cracking of 45CrNiMoVA Martensitic Advanced High‐Strength Steel

Gradient phase transformation of Al–Zn–Mg–Cu alloy induced by nonlinear interface wetting under electromagnetic shocking treatment

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