Spatially resolved localization and characterization of trapped hydrogen in zero to three dimensional defects inside ferritic steel

Krieger, Waldemar; Merzlikin, Sergiy Vasil ́ović; Bashir, Asif; Szczepaniak, Agnieszka; Springer, Hauke; Rohwerder, Michael

doi:10.1016/j.actamat.2017.10.066

Cited by 36 publications

(20 citation statements)

References 44 publications

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“…ppm compared to CR (IM) -0.66 wt. ppm is mainly due to the annihilation mainly of vacancies in agreement with Krieger et al [25]. The RK (recrystallized) samples were obtained by heating CR (IM) sample at 500°C for 24 h. After the recrystallization process, most strain fields around the dislocations are removed at the boundaries of newly formed grains through thermal activated motion.…”

Section: Hydrogen Trap Type In 5 Wt% Ni Cold-rolled Ferritic Steel -supporting

confidence: 74%

“…This also indicates that the trapped hydrogen was indeed quantitatively remaining in the material after the hydrogen loading process and was later fully detected by the TDS measurement. However, diffusible hydrogen was not accessible by TDS, which was proven by flat spectra obtained on A and RK samples [25]. Therefore, the total hydrogen amount calculated from the TDS spectra of A and RK is 0.…”

Section: Diffusible Hydrogen and Trapped Hydrogenmentioning

confidence: 99%

“…the term (t lagt L ) is substituted by the time lag caused by deep traps (t Trap ), and the total trap hydrogen concentration is shown (weight ppm): Figure 7 shows the total hydrogen amount calculated from KP-based permeation results using Equations (6) and (9) and TDS results [25]. Since A and RK do not have deep traps [25], the hydrogen concentration are calculated from Equation (6). CR (IM), CR (AM) and CR (IM) -300°C for 24 h are calculated from Equation (9).…”

Section: Diffusible Hydrogen and Trapped Hydrogenmentioning

confidence: 99%

“…For example, the binding energy of grain boundaries in ferritic steels is reported to range from 17 to 59 kJ/mol [18][19][20][21] and of dislocations ranges from 22 to 59 kJ/mol [18,[21][22][23][24]. These hydrogen traps can be categorized from zero-to three-dimensional and can be characterized separately by the TDS technique [25]. For example, vacancy is a typical 0D (point) hydrogen trap, and dislocation is a common 1D (linear) hydrogen trap.…”

Section: Introductionmentioning

confidence: 99%

“…Although TDS is a powerful technique to investigate the interaction between hydrogen and different hydrogen traps inside the material [17][18][19][20][21][22][23][24][25], some information is usually lost due to the loss of diffusible hydrogen before the measurement can start. A permeation experiment, on the other hand, is an in situ technique where all hydrogen in material will be kept.…”

Section: Introductionmentioning

confidence: 99%

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On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

Krieger

Rohwerder

2019

Science and Technology of Advanced Materials

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Quantitative detection of hydrogen in metal is important in providing a better basis for fundamental investigations of hydrogen embrittlement and hydrogen-related corrosion phenomena. Thermal desorption spectroscopy (TDS) has long been used in characterizing different hydrogen traps inside materials. However, in TDS measurements, the diffusible hydrogen (hydrogen at interstitial sites and weakly bound hydrogen) is usually not detected. The Davanathan-Starchurski permeation technique can cover this shortage. However, for such experiments, the stability of the palladium at the exit side, i.e. in aqueous solution under high potential polarization is an important issue. Alternatively, a Kelvin probe-based (KP-based) potentiometric method developed a few years ago has shown to allow quantitative determination of hydrogen in metal. This method is based on measuring the hydrogen electrode potential on the Pd-coated surface. The aim of this work is to check the reliability of this method and to demonstrate its potential applications in determining the hydrogen amount distributed in both shallow and deep traps in steel. The results reveal that different crystallographic orientation, grain shapes and grain sizes of the deposited palladium film (in the range of variation in this work) do not cause relevant effects on the KP-based hydrogen detection. It is shown in this work that the time lag and permeation rate derived from the permeation curves obtained by this method show a very good reliability and the calculated hydrogen amount shows a good agreement with TDS results. 5 wt.% Ni ferritic steel is used as a model material in this work.

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Section: Hydrogen Trap Type In 5 Wt% Ni Cold-rolled Ferritic Steel -supporting

confidence: 74%

Section: Diffusible Hydrogen and Trapped Hydrogenmentioning

confidence: 99%

Section: Diffusible Hydrogen and Trapped Hydrogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

Krieger

Rohwerder

2019

Science and Technology of Advanced Materials

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Hydrogen‐induced Damage ( HTHA , Embrittlement and Blistering)

2024

Hydrogen Energy

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The Potential of the Internal Friction Technique to Evaluate the Role of Vacancies and Dislocations in the Hydrogen Embrittlement of Steels

Vandewalle

Konstantinović

Depover

et al. 2021

steel research int.

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Hydrogen embrittlement of steels is known to have considerable impact in many engineering sectors. To be able to mitigate the hydrogen embrittlement problem, a profound comprehension of the interaction of hydrogen with the steel microstructure is required. Especially the interaction of hydrogen with dislocations and vacancies is very relevant as these defects are known to play an important role in hydrogen embrittlement. At present, thermal desorption spectroscopy is mostly used to study hydrogen–defect interactions. However, information obtained solely by this technique is insufficient to obtain a full understanding of the interaction of hydrogen with these defects in the steel microstructure. Herein, the use of internal friction, as a complementary technique to thermal desorption spectroscopy, to reveal the interaction of hydrogen with dislocations and vacancies, is reviewed based on the present understanding in the literature. Furthermore, the opportunities to use internal friction to characterize the interaction between hydrogen and these defects and to give more insight into the hydrogen embrittlement mechanism are discussed. It is demonstrated that internal friction has not yet been used to its full potential for this purpose, although it entails the opportunity to develop fundamental insights into the hydrogen embrittlement phenomenon.

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Spatially resolved localization and characterization of trapped hydrogen in zero to three dimensional defects inside ferritic steel

Cited by 36 publications

References 44 publications

On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

On the robustness of the Kelvin probe based potentiometric hydrogen electrode method and its application in characterizing effective hydrogen activity in metal: 5 wt. % Ni cold-rolled ferritic steel as an example

Hydrogen‐induced Damage ( HTHA , Embrittlement and Blistering)

The Potential of the Internal Friction Technique to Evaluate the Role of Vacancies and Dislocations in the Hydrogen Embrittlement of Steels

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