Hydrogen Stress Cracking Behaviour in Dissimilar Welded Joints of Duplex Stainless Steel and Carbon Steel

Park, Hanji; Moon, Byungrok; Moon, Young-Hoon; Kang, Nam Jun

doi:10.3390/met11071039

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…Figure 7h shows the formation of cracks inside the ferrite cleavage facets [37]. The low presence of ductile microvoids indicated that there was little tearing through γ-phase, supporting the idea of a more brittle α-phase coinciding with the higher density of cleavage facets [42]. As previously seen, the sites where the cracks nucleated were the inclusions, which appeared to be cracked in a brittle manner (see Figure 7i).…”

Section: Fractographic Studysupporting

confidence: 66%

Stress Corrosion Cracking Mechanisms of UNS S32205 Duplex Stainless Steel in Carbonated Solution Induced by Chlorides

Martin

Bastidas

2023

Metals

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Herein, the chloride-induced stress corrosion cracking (SCC) mechanisms of UNS S32205 duplex stainless steel (DSS) reinforcing bars in alkaline and carbonated solutions are studied. Electrochemical monitoring and mechanical properties were tested using linear polarization resistance and electrochemical impedance spectroscopy, coupled with the slow strain rate tensile test (SSRT) to evaluate the SCC behavior and unravel the pit-to-crack mechanisms. Pit initiation and crack morphology were identified by fractographic analysis, which revealed the transgranular (TG) SCC mechanism. HCO3− acidification enhanced the anodic dissolution kinetics, thus promoting a premature pit-to-crack transition, seen by the decrease in the maximum phase angle in the Bode plot at low frequencies (≈ 1 Hz) for the carbonated solution. The crack propagation rate for the carbonated solution increased by over 100% compared to the alkaline solution, coinciding with the lower phase angle from the Bode plots, as well as with the lower charge transfer resistance. Pit initiation was found at the TiN nonmetallic inclusion inside the ferrite phase cleavage facet, which developed TG-SCC.

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Section: Fractographic Studysupporting

confidence: 66%

Stress Corrosion Cracking Mechanisms of UNS S32205 Duplex Stainless Steel in Carbonated Solution Induced by Chlorides

Martin

Bastidas

2023

Metals

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“…2 Steel may be subject to hydrogen ingress during the welding process, and the welded joints may be prematurely damaged due to the damaging effects of hydrogen in long-term service in the hydrogen-containing environment. In recent years, most of the relevant existing works are about the effect of hydrogen on the mechanical properties of welded joints, such as Pan et al 3 studied the effect of hydrogen on the SCC of 2205 DSS simulated weld microstructure, Park et al 4 investigated the hydrogen stress cracking behaviour in dissimilar welded joints of DSS and carbon steel, and Fu et al 5 investigated the effect of hydrogen atoms on the SCC behaviour of SUS301L-MT stainless steel laser arc hybrid welded joints, while studies on the effect of hydrogen on the pitting behaviour of DSS welded joints are only sporadic. Therefore, it is essential to assess the effect of hydrogen on the pitting behaviour of DSS welded joints.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Zheng,

Zhang,

Wang

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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The effect of hydrogen on the pitting susceptibility of 2205 duplex stainless steel welded joints was investigated using metallographic characterisation, electrochemical techniques and immersion experiments. The results show that the diffusible hydrogen content in the welded joints is approximately twice that of base material (BM). Hydrogen significantly decreases the pitting potential (Epit) of the welded joints, while increasing the carrier density in the passive film, suggesting that hydrogen weakens the protective properties of the passive film and increases the pitting susceptibility of the welded joints. According to immersion experiments, the pitting susceptibility of the welded joint from high to low is heat-affected zone (HAZ), BM and weld metal (WM), the HAZ tends to be more prone to the formation of larger and more stable pits, and the number of inclusions at the HAZ is significantly greater than that at the BM and WM. For BM under hydrogen charging, austenite phase is usually corroded first, because hydrogen tends to be enriched in the austenitic phase of BM. However, in some regions of WM, ferrite phase corroded first, which is related to the enrichment of hydrogen in the ferrite in the weld area.

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“…Even minimal concentrations of hydrogen can lead to the embrittlement of metals and alloys. This embrittlement significantly diminishes their mechanical properties, thereby posing risks to the structural integrity and safety of the pipelines [11][12][13]. When hydrogen gas is transported through pipelines, it adsorbs and diffuses into the metal, altering the metal lattice structure.…”

Section: Introductionmentioning

confidence: 99%

Effects of Alloying Element on Hydrogen Adsorption and Diffusion on α-Fe(110) Surfaces: First Principles Study

Zhang,

Jiang

et al. 2024

Metals

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Based on first principles density functional theory (DFT) methods, this study employed the Cambridge Serial Total Energy Package (CASTEP) module within Materials Studio (MS) software under the generalized gradient approximation to investigate the adsorption, diffusion behavior, and electronic properties of hydrogen atoms on α-Fe(110) and α-Fe(110)-Me (Mn, Cr, Ni, Mo) surfaces, including calculations of their adsorption energies and density of states (DOS). The results demonstrated that doping with alloy atoms Me increased the physical adsorption energy of H2 molecules on the surface. Specifically, Mo doping elevated the adsorption energy from −1.00825 eV to −0.70226 eV, with the largest relative change being 30.35%. After doping with Me, the chemical adsorption energy of two hydrogen atoms does not change significantly, among which doping with Cr results in a decrease in the chemical adsorption energy. Building on this, further analysis of the chemical adsorption of single atoms on the surface was conducted. By comparing the adsorption energy and the bond length between a hydrogen atom and iron/dopant metal atom, it was found that Mo doping has the greatest impact, increasing the bond length by 58.58%. Analysis of the DOS functions under different doping conditions validated the interaction between different alloy elements and H atoms. Simultaneously, simulations were carried out on the energy barrier crossed by H atoms diffusing into the metal interior. The results indicate that Ni doping facilitates the diffusion of H atoms, while Cr, Mn, and Mo hinder their diffusion, with Mo having the most significant effect, where its barrier is 21.88 times that of the undoped surface. This conclusion offers deep insights into the impact of different doping elements on hydrogen adsorption and diffusion, aiding in the design of materials resistant to hydrogen embrittlement.

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Hydrogen Stress Cracking Behaviour in Dissimilar Welded Joints of Duplex Stainless Steel and Carbon Steel

Cited by 7 publications

References 38 publications

Stress Corrosion Cracking Mechanisms of UNS S32205 Duplex Stainless Steel in Carbonated Solution Induced by Chlorides

Stress Corrosion Cracking Mechanisms of UNS S32205 Duplex Stainless Steel in Carbonated Solution Induced by Chlorides

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Effects of Alloying Element on Hydrogen Adsorption and Diffusion on α-Fe(110) Surfaces: First Principles Study

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