Hydrogen assisted cracking of high-strength weldable steels in sea-water

Ćwiek, J.

doi:10.1016/j.jmatprotec.2005.02.083

Cited by 28 publications

(12 citation statements)

References 5 publications

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“…High amount of reversibly trapped hydrogen can lead to the fracture stress decrease and to the change of the fracture behaviour . The unfavourable situation can occur during straining, when hydrogen might be rapidly released from these trapping sites to the lattice and diffuse to the high stress fields causing crack initiation . Dislocations can be considered as the most dangerous trapping sites due to their lowest binding energy among other trapping sites .…”

Section: Introductionmentioning

confidence: 99%

The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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Hydrogen diffusivity and trapping have been studied in two advanced high strength steel grades and model samples using electrochemical permeation test. Microstructures of CP1000 and DP1000 steels consist of ferrite, martensite and a small fraction of retained austenite. In addition, bainite is present in CP1000. Model phases with predominance of a particular phase have been prepared by specific heat treatment. DP1000 has shown the lowest diffusivity among all materials, while ferritic model sample has shown the highest. Differences in hydrogen diffusion coefficient values are linked to trapping microstructural characteristics and grain size. K E Y W O R D Shydrogen-induced cracking, hydrogen permeability, steel

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Section: Introductionmentioning

confidence: 99%

The effect of microstructure on hydrogen permeability of high strength steels

Rudomilova

Prošek

Salvetr

et al. 2019

Materials & Corrosion

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“…Welding with rutile electrodes both in the air and underwater is a process of a high hydrogen content. Presence of hydrogen in steel weldments leads to degradation of their structure and mechanical properties [30]. On the basis of the previous tests the diffusible hydrogen content in deposited material obtained in air environment can be estimated to be about 35 ml/100g Fe, whereas in the case of underwater welding -50 ml/100 g Fe [15,31].…”

Section: Discussionmentioning

confidence: 97%

Weldability of high strength steels in wet welding conditions

Fydrych

Łabanowski

2013

Polish Maritime Research

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Among wet welding methods, the manual metal arc welding is most often used, hence majority of steel weldability test results accessible in the subject-matter literature concern the above mentioned process [4][5][6][11][12][13][14][15][16][17][18][19][20].Transferring the welding process to water environment results first of all in increasing diffusible hydrogen content in deposited metal, as well as in increased cooling rate. Manual metal arc welding in wet conditions generates the diffusible hydrogen content in deposited metal, of the order of a few dozen ml/100g Fe, depending on a type of shielding and welding conditions [14,15]. The tests [15,16] performed with the use of rutile-shielded electrodes, the most often applied in such conditions, showed that hydrogen content in deposited metal did not depend on a wetting degree of the shielding, but heat input was the decisive factor (Fig. 1).POLISH MARITIME RESEARCH 2(78)

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“…It is important to study the physical properties of the Fe-Ga alloy as a functional device; however, the mechanical stability in preparation and service processes should not be ignored either. Environmental factors could affect a mechanical and structural stability in service, such as SCC [26][27][28][29][30][31]. In addition, the microstructure in the material could induce changes in the electrochemical behavior in certain environments [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of SCC Behaviors for Two States of Fe85Ga15 Alloys in a 3.5 wt % NaCl Solution

Zhao

Zhang

et al. 2020

Materials

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The new magnetostrictive material Fe-Ga alloy has drawn considerable attention due to its excellent performance. The microstructure of the Fe-Ga alloy, which varies with the state of preparation or processing, not only affects the magnetostriction but also the mechanical service stability, i.e., the stress corrosion cracking (SCC) property. In this paper, we report a comparison of the SCC behaviors for two states of Fe85Ga15 alloys by using constant load experiments and the electrochemical method. Results showed that the hot-rolled Fe85Ga15 alloy exhibited better mechanical properties compared to the as-cast Fe85Ga15 alloy. SCC was found in both Fe85Ga15 alloys in a 3.5 wt % NaCl solution, and the as-cast alloy was more sensitive to SCC. The normalized thresholds of SCC for the as-cast and hot-rolled Fe85Ga15 alloys are 0.34 and 0.81, respectively. Furthermore, results also indicated that the SCC mechanism is an anodic dissolution for the Fe85Ga15 alloy.

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Hydrogen assisted cracking of high-strength weldable steels in sea-water

Cited by 28 publications

References 5 publications

The effect of microstructure on hydrogen permeability of high strength steels

The effect of microstructure on hydrogen permeability of high strength steels

Weldability of high strength steels in wet welding conditions

A Comparison of SCC Behaviors for Two States of Fe85Ga15 Alloys in a 3.5 wt % NaCl Solution

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