Hydrogen embrittlement analysis in a CrMoV steel by means of sent specimens

Álvarez, G.; Zafra, A.; Belzunce, F. J.; Rodríguez, Celestino

doi:10.1016/j.tafmec.2019.102450

Cited by 17 publications

(8 citation statements)

References 39 publications

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“…The hydrogen analyses on specimens tested in autoclaves gave results, which indicate an overall low but still detectable hydrogen absorption. The values for hydrogen uptake presented in this work are in good agreement with findings from the literature where similar steel grades were charged in H 2 gas [21,37,38,42,43]. Fluctuations in the total hydrogen content after autoclave tests under different conditions can be attributed to different causes.…”

Section: Discussionsupporting

confidence: 90%

“… Threshold hydrogen content for hydrogen embrittlement of various martensitic and bainitic steel grades. Literature data from [ 19 , 20 , 21 , 22 , 23 , 24 , 42 , 43 , 44 , 52 , 53 , 54 ], missing values for UTS were estimated with YS × 1.10. …”

Section: Figurementioning

confidence: 99%

“…ppm [41]. Álvarez et al [42] charged the bainitic-martensitic 2.25Cr1Mo0.3V (YS = 590 MPa, UTS = 700 MPa) in 195 bar H 2 gas at 450 • C and measured a hydrogen content of 4.2 wt. ppm.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Uptake and Embrittlement of Carbon Steels in Various Environments

Trautmann

Mori

Oberndorfer³

et al. 2020

Materials

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To avoid failures due to hydrogen embrittlement, it is important to know the amount of hydrogen absorbed by certain steel grades under service conditions. When a critical hydrogen content is reached, the material properties begin to deteriorate. The hydrogen uptake and embrittlement of three different carbon steels (API 5CT L80 Type 1, P110 and 42CrMo4) was investigated in autoclave tests with hydrogen gas (H2) at elevated pressure and in ambient pressure tests with hydrogen sulfide (H2S). H2 gas with a pressure of up to 100 bar resulted in an overall low but still detectable hydrogen absorption, which did not cause any substantial hydrogen embrittlement in specimens under a constant load of 90% of the specified minimum yield strength (SMYS). The amount of hydrogen absorbed under conditions with H2S was approximately one order of magnitude larger than under conditions with H2 gas. The high hydrogen content led to failures of the 42CrMo4 and P110 specimens.

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Section: Discussionsupporting

confidence: 90%

Section: Figurementioning

confidence: 99%

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Hydrogen Uptake and Embrittlement of Carbon Steels in Various Environments

Trautmann

Mori

Oberndorfer³

et al. 2020

Materials

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show abstract

“…These HEI results cannot be directly compared with the results from standard procedures [19] for two reasons: the different hydrogen pre-charging conditions used in each type of test (eloctrolitic pre-charge for SPT vs gaseous pre-charge for standard), and the different triaxiality exhibited (much lower in the SPT). However, the SPT embrittlement values obtained can be considered valid, since like the standard ones [19,33,34], they show that the phenomenon of hydrogen embrittlement increases with the strength and hardness of the material (see Table 2-3 and 6).…”

Section: Hydrogen Embrittlement Analysis With Notched Pre-charged Spt...mentioning

confidence: 82%

“…In order to pre-charge the SPT samples with hydrogen, a cathodic precharging method was used. A current density of 2 mA/cm 2 was applied for 4 hours at 20C [33] using the same electrolyte employed in the charging cell of the double permeation cell, as shown in Figure 7.b.…”

Section: Figure 8 Hydrogen Permeation Curvesmentioning

confidence: 99%