Study on hydrogen assisted cracking susceptibility of HSLA steel by implant test

Chakraborty, Goutam; Rejeesh, R.; Albert, Shaju K.

doi:10.1016/j.dt.2016.09.003

Cited by 22 publications

(6 citation statements)

References 8 publications

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“…As mentioned, the hydrogen diffusion inside the welded joint cannot be in situ measured by the experiment methods, including the traditional test methods [34,35,36,37] and advanced in situ observation technology [38,39,40]. The finite element analysis is probably the only effective method to predict the hydrogen concentration evolution.…”

Section: Introductionmentioning

confidence: 99%

Self-Gathering Effect of the Hydrogen Diffusion in Welding Induced by the Solid-State Phase Transformation

et al. 2019

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The hydrogen diffusion in welding was investigated by using thermal-mechanical-hydrogen diffusion sequential coupled procedures based on finite element method. A self-gathering effect induced by the solid-state phase transformation was discovered. Because of the self-gathering effect, the hydrogen concentration in weld metal was accumulated to a peak value which can be larger than the initial hydrogen concentration in molten pool, and subsequently the hydrogen concentration in heat affect zone was redistributed. In multi-pass welding, the gathered effect not only happened inside a weld pass, but also in the inter-pass, which further increased the sensitivity of the hydrogen-assisted cold cracking. Controlling should be adopted to restrain the hydrogen accumulation. Welding stress evolution during the solid-state phase transformation process had limited effect on the hydrogen diffusion.

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Section: Introductionmentioning

confidence: 99%

Self-Gathering Effect of the Hydrogen Diffusion in Welding Induced by the Solid-State Phase Transformation

et al. 2019

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“…Due to the presence of oxide particles, nucleation sites for acicular ferrite increases [28]. The acicular ferrite microstructure increases the resistance to cold cracking and is one of the favourable microstructures to increase cold cracking resistance [5–10]. The interlocking nature of the acicular ferrite microstructure offers high cold cracking resistance.…”

Section: Resultsmentioning

confidence: 99%

“…The fine acicular ferrite microstructure promotes high resistance to cold cracking [7]. The effects of rare earth oxides on increasing the cold cracking resistance of the steel have been proposed to increase impact strength significantly [8]. The nanomaterials with proper size and uniform distribution have increased the pinning effect on grain boundary and grain nucleation when undergoing GMAW and gas tungsten arc welding [8].…”

Section: Introductionmentioning

confidence: 99%

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Artificial neural network modelling of cold‐crack resistance of high strength low alloy steel 950A

Muralidaran¹,

Krishnasamy²

2019

J. eng.

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“…In conclusion, Koyama et al [ 21 ] gave an overview of recent progress in microstructure-specific hydrogen mapping techniques. However, the hydrogen diffusion inside the welded joint cannot be in-situ measured by experimental methods including traditional test methods [ 22 , 23 , 24 , 25 ] and advanced in-situ observation technology [ 26 , 27 , 28 ]. Finite element analysis was an effective method to quantitatively predict the change of hydrogen concentration of the welded joint.…”

Section: Introductionmentioning

confidence: 99%

Study on Hydrogen Diffusion Behavior during Welding of Heavy Plate

2020

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For the multi-layer and multi-pass welding process of the heavy plate, the hydrogen diffusion behavior was numerically simulated to study the effect of solid-state phase transition (SSPT) on the hydrogen diffusion in the thickness direction, and the influence of the residual stress-induced diffusion after SSPT. The calculation results were compared with the experimental results. The comparison shows that the distribution of hydrogen concentration in the direction of thickness was in good agreement. The position with the most severe cold cracking sensitivity was located at a 20–30 mm depth from the top surface in this article. After welding, the hydrogen concentration in this position was kept at a high level for a long time under the effect of the size-constraint effect of the heavy plate and the existence of welding residual stress gradient. In addition, the SSPT reduced the residual stress level of weld metal (WM) significantly, increased that of the heat affected zone (HAZ), and the hydrogen was redistributed under the influence of stress. In the process of phase transformation, the parameters of hydrogen diffusion property of the material changed dramatically in a short time, the hydrogen diffusion coefficient increased in order of magnitude, and the solubility decreased in order of magnitude. This directly led to the upward diffusion of hydrogen in WM, and produced a self-gathering effect. For a welded joint of heavy plate, the self-gathering effect between passes was effective in the short-range and ineffective in the long-range.

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Study on hydrogen assisted cracking susceptibility of HSLA steel by implant test

Cited by 22 publications

References 8 publications

Self-Gathering Effect of the Hydrogen Diffusion in Welding Induced by the Solid-State Phase Transformation

Self-Gathering Effect of the Hydrogen Diffusion in Welding Induced by the Solid-State Phase Transformation

Artificial neural network modelling of cold‐crack resistance of high strength low alloy steel 950A

Study on Hydrogen Diffusion Behavior during Welding of Heavy Plate

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