A new perspective on hydrogen diffusion and hydrogen embrittlement in low-alloy high strength steel

Cheng, Xiaoying; Zhang, H.X.

doi:10.1016/j.corsci.2020.108800

Cited by 48 publications

(6 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The apparent diffusion coefficient (D app ) to the samples of as-received steel and in the T350, T440 and T525 conditions was calculated by the time-lag (t l ) method through the Equation 3 28,29 using the first transients. The effective diffusivity (D eff ) was obtained using the second permeation transients, trough the same equation.…”

Section: Electrochemical Testsmentioning

confidence: 99%

Heat Treatment Effect on Hydrogen Permeation and Trapping in the API 5CT P110 Steel

Oliveira,

Carrasco,

Vilar

et al. 2023

Mat. Res.

View full text Add to dashboard Cite

The effect of heat treatment on hydrogen diffusion and trapping on the API 5CT P110 steel was investigated trough electrochemical permeation tests and microstructural analysis techniques. Samples of as-received steel were tempered at different temperatures to obtain hydrogen permeation and trapping parameters and to characterize microstructural modifications that may alter these parameters. After permeation tests on each heat-treatment condition were verified changes on hydrogen kinetic parameters. Microstructural analysis revelated changes in dislocations density and volumetric fraction of titanium carbides, responsible to alterations in diffusivity, solubility and in hydrogen trapping characteristics. As these carbides are considered irreversible hydrogen traps, are beneficial because they become the steels less susceptible to hydrogen embrittlement. Therefore, the results suggest that there is an optimal tempering temperature which can make the API 5CT P110 steel more resistant against hydrogen embrittlement, since promote the formation of a higher number of irreversible hydrogen traps.

show abstract

Section: Electrochemical Testsmentioning

confidence: 99%

Heat Treatment Effect on Hydrogen Permeation and Trapping in the API 5CT P110 Steel

Oliveira,

Carrasco,

Vilar

et al. 2023

Mat. Res.

View full text Add to dashboard Cite

show abstract

“…The interaction between hydrogen and metals can result in forming solid solutions of hydrogen in metals, solid compounds such as hydrides, and gaseous compounds with other elements in the metal. Also, atomic hydrogen itself can react to form molecular hydrogen [5][6][7][8][9]. It is a complex and multifaceted issue that depends on various factors, including the type of steel, environmental conditions and the specific application.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

Mamassi,

Ioannidou,

Deligiannis

et al. 2024

MSF

View full text Add to dashboard Cite

Steel hydrogen embrittlement (HE), a complex and multifaceted issue, can lead to sudden and catastrophic failure, without significant plastic deformation, making it a critical concern in the industrial sector. The present investigation focuses on the evaluation of HE effects regarding microstructure, mechanical properties degradation and type of fracture of AISI 1010 low-carbon steel, after accelerated hydrogen cathodic charging. Hydrogen was diffused electrolytically in 0.2 Μ H2SO4 solution, containing 3g/L of NH4SCN, using a cathodic current density of 10 and 20 mA/cm2, for 6 and 18 h. Mechanical properties were investigated through slow-rate tensile tests, as well as Charpy V-notch (CVN) impact tests, to determine the value of fracture toughness, both in uncharged and electrochemically pre-charged specimens. Vickers microhardness tests were conducted on the cross-sections of the hydrogen charged samples to evaluate embrittlement susceptibility, due to the presence of dissolved hydrogen. The microstructure modification was carried out through light optical (LOM) and scanning electron microscopy (SEM), in conjunction with an energy-dispersive X-ray detector (EDS). Slow scan X-ray diffraction (SSXRD) was also conducted for crystal structure analysis. The microstructure analysis showed the presence of large amounts of secondary cracks and cavities into the steel matrix, due to hydrogen diffusion and its accumulation at various sites. Hydrogen charging caused a significant gradual elongation decrease of the parent material, from 25% to 6.73%, in case of embrittlement at 20 mA/cm2 for 18h. Accordingly, after 18 h of exposure, the impact energy decrement was determined at 31.5%, at a current density of 10 mA/cm2, whereas the corresponding reduction at 20 mA/cm2 reached 68%.

show abstract

“…H can be produced by decoupling H atoms from their carriers, such as water [ 3 , 4 ]. However, the storage of H and/or being present in an H environment negatively affects the strength and ductility of different steel grades [ 5 , 6 , 7 , 8 , 9 , 10 ] because the H accelerates crack growth rate and so shortens service life; this phenomenon is known as hydrogen embrittlement (HE) susceptibility. Therefore, addressing the challenges associated with HE is crucial for realizing the full potential of H as a clean energy source.…”

Section: Introductionmentioning

confidence: 99%

Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

et al. 2023

View full text Add to dashboard Cite

In the present study, the hydrogen embrittlement (HE) susceptibility of an additively manufactured (AM) 316L stainless steel (SS) was investigated. The materials were fabricated in the form of a lattice auxetic structure with three different strut thicknesses, 0.6, 1, and 1.4 mm, by the laser powder bed fusion technique at a volumetric energy of 70 J·mm−3. The effect of H charging on the strength and ductility of the lattice structures was evaluated by conducting tensile testing of the H-charged specimens at a slow strain rate of 4 × 10−5 s−1. Hydrogen was introduced to the specimens via electrochemical charging in an NaOH aqueous solution for 24 h at 80 °C before the tensile testing. The microstructure evolution of the H-charged materials was studied using the electron backscattered diffraction (EBSD) technique. The study revealed that the auxetic structures of the AM 316L-SS exhibited a slight reduction in mechanical properties after H charging. The tensile strength was slightly decreased regardless of the thickness. However, the ductility was significantly reduced with increasing thickness. For instance, the strength and uniform elongation of the auxetic structure of the 0.6 mm thick strut were 340 MPa and 17.4% before H charging, and 320 MPa and 16.7% after H charging, respectively. The corresponding values of the counterpart’s 1.4 mm thick strut were 550 MPa and 29% before H charging, and 523 MPa and 23.9% after H charging, respectively. The fractography of the fracture surfaces showed the impact of H charging, as cleavage fracture was a striking feature in H-charged materials. Furthermore, the mechanical twins were enhanced during tensile straining of the H-charged high-thickness material.

show abstract

A new perspective on hydrogen diffusion and hydrogen embrittlement in low-alloy high strength steel

Cited by 48 publications

References 77 publications

Heat Treatment Effect on Hydrogen Permeation and Trapping in the API 5CT P110 Steel

Heat Treatment Effect on Hydrogen Permeation and Trapping in the API 5CT P110 Steel

Investigation of Hydrogen Embrittlement Effect on Microstructure Mechanical Properties and Fracture of Low-Carbon Steels

Effects of Wall Thickness Variation on Hydrogen Embrittlement Susceptibility of Additively Manufactured 316L Stainless Steel with Lattice Auxetic Structures

Contact Info

Product

Resources

About