Effect of Film-Induced Stress on Mechanical Properties at Stress Corrosion Cracking Tip

Yang, Haijiao; Xue, He; Yang, Fuqiang; Zhao, Lingyan

doi:10.1016/s1875-5372(18)30043-2

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…The dissolution of Cr 2 O 3 could decrease a less protective oxide layer, inducing a significant decrease in R ox . With the prolonged immersion time (246, 339, and 508 h), the inward diffusion of oxidants over the oxide layer tends to a quasi‐static state and the interface reaction of chromium oxide would subsequently occur [ 32 ] :

\mathrm{Fe}\,+{\mathrm{Cr}}_{2}{{\rm{O}}}_{3}+{{\rm{O}}}^{2-}\leftrightarrow {\mathrm{FeCr}}_{2}{{\rm{O}}}_{4}+2{{\rm{e}}}^{-}.

…”

Section: Resultsmentioning

confidence: 99%

“…The dissolution of Cr 2 O 3 could decrease a less protective oxide layer, inducing a significant decrease in R ox . With the prolonged immersion time (246, 339, and 508 h), the inward diffusion of oxidants over the oxide layer tends to a quasi-static state and the interface reaction of chromium oxide would subsequently occur [32] :…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

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Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Wang

Feng

et al. 2022

Materials & Corrosion

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The impact of NaCl impurity on corrosion of stainless steel (SS) 316 L in binary nitrate salts (60 wt% NaNO 3 + 40 wt% KNO 3 ) was systematically investigated at 565°C via electrochemical measurements. SS 316 L exhibits active dissolution behavior in salts containing 0-1.4 wt% NaCl. The influence of NaCl impurity shows a strong time dependence according to the negligibly affected corrosion current density obtained from a short-time potentiodynamic polarization sweep. The corrosion process of 316L in salts with NaCl-free is controlled by ions transport through the oxide layer. With the presence of NaCl impurity, it is controlled by higher rate of ions transport and the diffusion of metal chlorides. The alternation in basicity in the corrosion front caused by chloride ions increases the solubility of chromium oxide and hence the dissolution of chromium oxide, which can lead to the formation of a less protective oxide layer.

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\mathrm{Fe}\,+{\mathrm{Cr}}_{2}{{\rm{O}}}_{3}+{{\rm{O}}}^{2-}\leftrightarrow {\mathrm{FeCr}}_{2}{{\rm{O}}}_{4}+2{{\rm{e}}}^{-}.

…”

Section: Resultsmentioning

confidence: 99%

“…The dissolution of Cr 2 O 3 could decrease a less protective oxide layer, inducing a significant decrease in R ox . With the prolonged immersion time (246, 339, and 508 h), the inward diffusion of oxidants over the oxide layer tends to a quasi-static state and the interface reaction of chromium oxide would subsequently occur [32] :…”

Section: Potentiodynamic Polarization Curvesmentioning

confidence: 99%

Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Wang

Feng

et al. 2022

Materials & Corrosion

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“…SIF which is used in materials with small scale yielding at a crack tip represents the state of stress near the crack tip. In linear elastic fracture mechanics, it is used to explain the intensification of applied stress at the crack tip and is an important factor in characterizing the driving force and the crack propagation rate [29]. It basically depends on the geometry of the crack, location of the crack and applied load.…”

Section: Role Of Stress Intensity Factor (Sif) In Scc and Hic Crack Pmentioning

confidence: 99%

Effects of Different Parameters on Initiation and Propagation of Stress Corrosion Cracks in Pipeline Steels: A Review

Mohtadi-Bonab

2019

Metals

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The demand for pipeline steels has increased in the last several decades since they were able to provide an immune and economical way to carry oil and natural gas over long distances. There are two important damage modes in pipeline steels including stress corrosion cracking (SCC) and hydrogen induced cracking (HIC). The SCC cracks are those cracks which are induced due to the combined effects of a corrosive environment and sustained tensile stress. The present review article is an attempt to highlight important factors affecting the SCC in pipeline steels. Based on a literature survey, it is concluded that many factors, such as microstructure of steel, residual stresses, chemical composition of steel, applied load, alternating current (AC) current and texture, and grain boundary character affect the SCC crack initiation and propagation in pipeline steels. It is also found that crystallographic texture plays a key role in crack propagation. Grain boundaries associated with {111}∥rolling plane, {110}∥rolling plane, coincidence site lattice boundaries and low angle grain boundaries are recognized as crack resistant paths while grains with high angle grain boundaries provide easy path for the SCC intergranular crack propagation. Finally, the SCC resistance in pipeline steels is improved by modifying the microstructure of steel or controlling the texture and grain boundary character.

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“…When a passive film forms on the surface of a crack tip during EAC, even at only several nanometers, it can still effectively slow down or block the diffusion of hydrogen permeating into the crack tip [43], and decreases the EAC rate dramatically. Moreover, the growth of CPFs will also induce extra stress (referred to as CPF-induced stress), which could lead to the redistribution of stress [44][45][46][47][48] and hydrogen redistribution [27], and eventually affect the EAC susceptibility [49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Modeling Corrosion Product Film Formation and Hydrogen Diffusion at the Crack Tip of Austenitic Stainless Steel

Yang,

Zhang,

Zhang

2023

Materials

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Corrosion product films (CPFs) have significant effects on hydrogen permeation and the corrosion process at the crack tip. This paper established a two-dimensional calculation model to simulate the formation of CPFs at the crack tip and its effects on the crack tip stress status and hydrogen diffusion. The CPFs were simplified as a single-layer structure composed of Fe2O3, the effective CPFs boundary was modeled by the diffusion of oxygen, and the CPF-induced stress was modeled by hygroscopic expansion. The simulation was conducted with two stages; the first stage was to simulate the formation of CPFs formation and its effects on the crack tip stress status, while the second stage focused on the hydrogen diffusion with and without CPF formation under different external tensile loads. The results indicate that the highest compressive stress induced by the formation of CPFs is located at 50~60° of the crack contour and dramatically weakens the crack tip tensile stress at low-stress status. The CPFs can inhibit the hydrogen permeation into the crack tip, and the hydrostatic pressure effects on the redistribution of the permeated hydrogen are significant under larger external load conditions.

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Effect of Film-Induced Stress on Mechanical Properties at Stress Corrosion Cracking Tip

Cited by 8 publications

References 14 publications

Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Impact of NaCl impurity on corrosion of 316 L steel in molten nitrate salts for thermal energy storage: An electrochemical study

Effects of Different Parameters on Initiation and Propagation of Stress Corrosion Cracks in Pipeline Steels: A Review

Modeling Corrosion Product Film Formation and Hydrogen Diffusion at the Crack Tip of Austenitic Stainless Steel

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