Strong resistance to hydrogen embrittlement of high-performance superalloy MP35N under 200 MPa (≈30,000 psi) H 2 gas pressure - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles High Pressure Research Year : 2024

Strong resistance to hydrogen embrittlement of high-performance superalloy MP35N under 200 MPa (≈30,000 psi) H 2 gas pressure

Abstract

Embrittlement of steels and alloys in contact with hydrogen gas under pressure is a key problem in metallurgy with important implications for a future energy economy based on hydrogen. Here we report stress–strain measurements recorded under 200 MPa (∼30,000 PSI) hydrogen gas pressure to evaluate the resistance of MP35N to embrittlement. We find that MP35N with a tensile strength of more than 1800 MPa does not suffer any strength loss, retains a significant amount of ductility and hence appears to be highly resistant to hydrogen embrittlement even under elevated stress when exposed over a time-scale of hours. This exceptional resistance to H-embrittlement seems to be unique among all high-performance steels and alloys of comparable strength and bears on the use of this material for high pressure H2 research devices and storage applications.
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Friday, October 18, 2024
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Friday, October 18, 2024
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hal-04642094 , version 1 (09-07-2024)

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Stefan Klotz, Louis Amand, Eddy Lelièvre-Berna, R. Khasanov, M. Elender, et al.. Strong resistance to hydrogen embrittlement of high-performance superalloy MP35N under 200 MPa (≈30,000 psi) H 2 gas pressure. High Pressure Research, 2024, 44 (2), pp.116-126. ⟨10.1080/08957959.2024.2339332⟩. ⟨hal-04642094⟩
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