A multi-method approach to the study of hydrogen trapping in a maraging stainless steel: the impact of B2-NiAl precipitates and austenite

Bestautte, J.; Oudriss, A.; Lenci, M.; Bechet, D.; Obadia, Z.; Feaugas, X.; Christien, F.

doi:10.1016/j.corsci.2023.111509

Cited by 4 publications

(6 citation statements)

References 100 publications

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“…In this study, the proportion of reverted austenite (when formed) is very low. Austenite could also have brought a potential loss of sensitivity in HE thanks to its general softness and as a microstructural element that rather deeply trap hydrogen, as shown in this present study with TDS characterization, or as shown in other studies in the literature [26,28,34]. But because this austenite, which is retained, is non-stable in the two 1.4614 and 1.4543 grades, this last one cannot bring any potential loss of sensitivity in HE.…”

Section: Discussionsupporting

confidence: 54%

“…The destabilization of the retained austenite by straining is very well documented in the literature [32,33] and this strain-induced transformation may explain why the presence of additional retained austenite does not provide any decrease in HE sensitivity. This is probably not the case of reverted austenite as shown in many papers and already demonstrated for maraging stainless steels as in 17-4 PH [26] or PH 13-8 Mo [28,34]. In this study, the proportion of reverted austenite (when formed) is very low.…”

Section: Discussionsupporting

confidence: 47%

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Hydrogen Embrittlement Characterization of 1.4614 and 1.4543 Martensitic Precipitation Hardened Stainless Steels

Latu-Romain,

Schutz,

Martin

et al. 2024

Metals

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Hydrogen embrittlement (HE) of 1.4614 and 1.4543 maraging stainless steels is characterized with fine structural TEM-ASTAR, hydrogen electrochemical permeation, thermodesorption and tensile testing (with slow strain rate during H cathodic charging) experiments. Both solutions annealed and 550 °C aged states are studied. When aged, 1.4614 grade contains nanometric hexagonal Ni3Ti precipitates whereas 1.4543 grade contains three families of nanometric precipitates, namely, hexagonal Ni3Ti, non fcc-rich Cu and G-phase rich in Si, Ti and Ni with cube-cube relations with martensite. From the permeation and thermodesorption results, it appears that austenite and nanometric precipitates seem to constitute deep traps for hydrogen in both grades. From tensile tests with in situ H charging, 1.4614 and 1.4543 maraging grades show a high susceptibility to HE with relative reduction of area (RRA) strictly superior to 80% for both metallurgical states. The presence of retained austenite does not seem to bring any HE resistance because of its transformation into martensite during deformation.

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Section: Discussionsupporting

confidence: 54%

Section: Discussionsupporting

confidence: 47%

Hydrogen Embrittlement Characterization of 1.4614 and 1.4543 Martensitic Precipitation Hardened Stainless Steels

Latu-Romain,

Schutz,

Martin

et al. 2024

Metals

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“…The negative effect of a high Mn content on the creep properties of AFA steel should be due to the inhibitory effect of Mn on the precipitation of the nano-sized B2–NiAl phase and secondary NbC phase, as shown in Figure 2 and Figure 3 [ 36 , 39 ]. These nano-sized precipitates play a major role in the creep resistance process [ 33 ].…”

Section: Tensile Properties and Creep Resistancementioning

confidence: 99%

Section: Tensile Properties and Creep Resistancementioning

confidence: 99%

“…These nano-sized precipitates play a major role in the creep resistance process [33]. Furthermore, the addition of Mn promotes Cr segregation and accelerates the formation of a large sized σ phase, which is the starting point of crack propagation and damages the mechanical properties of AFA steel [15,23,36,40]. However, the elongation of the 12Ni experimental steel decreased from 35% to 21% with the increase in Mn content at 650 • C. This is because the decrease in B2-NiAl phase and secondary NbC phase, which are effectively strengthened phases for AFA steel [17,[33][34][35][36], while the strengthening effect of the larger M 23 C 6 phase will be weakened at a high temperature.…”

Section: Creep Resistancementioning

confidence: 99%

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The Effect of Replacing Ni with Mn on the Microstructure and Properties of Al2O3-Forming Austenitic Stainless Steels: A Review

Chen,

Du,

Zhou

2023

Materials

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Al2O3-forming austenitic steel (AFA steel) is an important candidate material for advanced reactor core components due to its excellent corrosion resistance and high temperature strength. Al is a strong ferrite-forming element. Therefore, it is necessary to increase the Ni content to stabilize austenite. Ni is expensive and highly active, and so increasing the Ni content not only increases the costs but also damages the radiation resistance. Mn is a low-cost austenitic stable element. Its substitution for Ni will not only help to improve the irradiation resistance of austenitic steel, but also reduce the cost. In order to explore the feasibility of Mn-substituted Ni-stabilized austenite in AFA steel, this paper summarized the research progress of Mn-added AFA steels, whilst the research status of traditional Mn-added austenitic steels are also referred to and compared herein. The effect of the addition of Mn on the microstructure and properties of AFA steel was analyzed. The results show that Mn can promote the precipitation of the M23C6 phase and inhibit the precipitation of the B2-NiAl phase and secondary NbC phase. With the increase in Mn content, the strength of AFA steel at room temperature and high temperature decreased slightly, the room temperature elongation increased slightly, while the high temperature elongation and creep resistance decreased obviously. In addition, for austenitic steel free of Al, the addition of Mn will destroy the oxide layer of Cr2O3, which will decrease the oxidation resistance of the steel. But the preliminary study shows that Mn has little effect on the Al2O3 oxide layer. It is worth studying the effect of Mn-substituted Ni on the oxidation resistance of AFA steel. In summary, more efforts are necessary to investigate the optimal Mn content to balance the advantages and disadvantages of introducing Mn instead of Ni.

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Analysis of the delayed cracking mechanism of an industrial hot-dip galvanized DP1180GI steel coil

Li,

Zhou,

Zhou

et al. 2024

Engineering Failure Analysis

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A multi-method approach to the study of hydrogen trapping in a maraging stainless steel: the impact of B2-NiAl precipitates and austenite

Cited by 4 publications

References 100 publications

Hydrogen Embrittlement Characterization of 1.4614 and 1.4543 Martensitic Precipitation Hardened Stainless Steels

Hydrogen Embrittlement Characterization of 1.4614 and 1.4543 Martensitic Precipitation Hardened Stainless Steels

The Effect of Replacing Ni with Mn on the Microstructure and Properties of Al2O3-Forming Austenitic Stainless Steels: A Review

Analysis of the delayed cracking mechanism of an industrial hot-dip galvanized DP1180GI steel coil

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