Effect of the Heat-Affected Zones on Hydrogen Permeation and Embrittlement of Low-Carbon Steels

Razzini, G.; Cabrini, Marina; Maffí, S.; Mussati, G.; Bicelli, L. Peraldo

doi:10.4028/www.scientific.net/msf.289-292.1257

Cited by 6 publications

(5 citation statements)

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“…A microhardness map is also presented in Figure 4. The photoelectrochemical images demonstrate the higher solubility and lower diffusivity of hydrogen in martensite than in ferritepearlite (Razzini et al, 1988).…”

Section: Hydrogen Diffusion Visualization Through the Scanning Photoelectrochemical Techniquementioning

confidence: 94%

“…The photoelectrochemical image was recorded during hydrogen degassing (Razzini et al, 1999). (Razzini, Cabrini, Maffi, Musatti, & Peraldo-Bicelli, 1988). (Razzini, Cabrini, Maffi, Mussati, & Peraldo Bicelli, 1999).…”

Section: Hydrogen Diffusion Visualization Through the Scanning Photoelectrochemical Techniquementioning

confidence: 99%

“…(B) The martensite structure delays hydrogen diffusion during hydrogen charging. (C) After several hours of hydrogen outgassing, hydrogen remains in martensitic areas(Razzini, Cabrini, Maffi, Musatti, & Peraldo-Bicelli, 1988).…”

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confidence: 99%

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Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

et al. 2015

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This article deals with the risk of environmentally assisted cracking of steel structures that are kept under cathodic protection (CP). The experimental results collected on both hydrogen diffusion and hydrogen embrittlement (HE) of high-strength low-alloy (HSLA) steels under CP are discussed. Hydrogen diffusion was evaluated by permeation experiments and a scanning photoelectrochemical current technique, as a function of microstructure orientation, on both loaded and unloaded specimens. HE tests were carried out under constant load, slow strain rate (SSR tests), and slow bending conditions. Tests were also carried out on several grades of HSLA steel having different microstructures. The results confirm that HE in artificial seawater under CP can occur in steel with tensile yield strength in the range of 400–660 MPa only in the presence of high cathodic polarization and continuous plastically straining conditions. HE susceptibility increased with increasing applied cathodic polarization and with decreasing strain rate. HE susceptibility of the rolled steels at relatively high strain rate (10-4 to 10-5 s-1) increased with the hydrogen diffusion coefficient. Similar results were observed in terms of the HE contribution to corrosion fatigue crack growth rate. High-temperature-tempered martensitic steels showed a lower HE susceptibility.

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Section: Hydrogen Diffusion Visualization Through the Scanning Photoelectrochemical Techniquementioning

confidence: 94%

Section: Hydrogen Diffusion Visualization Through the Scanning Photoelectrochemical Techniquementioning

confidence: 99%

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Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

et al. 2015

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“…Furthermore, Razzini et al—by visualizing the hydrogen distribution in an artificial hard spot on API 5L X60 steel by using photo-electrochemical technique—demonstrated that the solubility of hydrogen in the heat affected zones of hard spots is higher than the base material [7]. In the absence of microstructural alterations, pipeline steels are immune to HE under cathodic protection, even at very low cathodic potentials [8].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Embrittlement Evaluation of Micro Alloyed Steels by Means of J-Integral Curve

Cabrini

Sinigaglia²,

Spinelli

et al. 2019

Materials

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The aim of this work is the evaluation of the hydrogen effect on the J-integral parameter. It is well-known that the micro alloyed steels are affected by Hydrogen Embrittlement phenomena only when they are subjected at the same time to plastic deformation and hydrogen evolution at their surface. Previous works have pointed out the absence of Hydrogen Embrittlement effects on pipeline steels cathodically protected under static load conditions. On the contrary, in slow strain rate tests it is possible to observe the effect of the imposed potential and the strain rate on the hydrogen embrittlement steel behavior only after the necking of the specimens. J vs. Δa curves were measured on different pipeline steels in air and in aerated NaCl 3.5 g/L solution at free corrosion potential or under cathodic polarization at −1.05 and −2 V vs. SCE. The area under the J vs. Δa curves and the maximum crack propagation rate were taken into account. These parameters were compared with the ratio between the reduction of area in environment and in air obtained by slow strain rate test in the same environmental conditions and used to rank the different steels.

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“…The critical role of the hard spots can be ascribed to the presence of martensite which is the most susceptible microstructure to HE [11,[23][24][25] . Furthermore, Razzini et al -by visualizing the hydrogen distribution in an artificial hard spot on API 5L X60 steel with the use of a photoelectrochemical technique -demonstrated that the solubility of hydrogen in the heat affected zones of hard spots is higher than in the base material [26] .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Embrittlement and Diffusion in High Strength Low Alloyed Steels with Different Microstructures

Cabrini

Lorenzi

Bucella

et al. 2019

IMS

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<p class="BodyText1">The paper deals with the effect of microstructure on the hydrogen diffusion in traditional ferritic-pearlitic HSLA steels and new high strength steels, with tempered martensite microstructures or banded ferritic-bainitic-martensitic microstructures. Diffusivity was correlated to the hydrogen embrittlement resistance of steels, evaluated by means of slow strain rate tests. </p>

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Effect of the Heat-Affected Zones on Hydrogen Permeation and Embrittlement of Low-Carbon Steels

Cited by 6 publications

References 0 publications

Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

Environmentally assisted cracking and hydrogen diffusion in traditional and high-strength pipeline steels

Hydrogen Embrittlement Evaluation of Micro Alloyed Steels by Means of J-Integral Curve

Hydrogen Embrittlement and Diffusion in High Strength Low Alloyed Steels with Different Microstructures

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