Evaluation of hydrogen embrittlement in notched STS 310S using electrochemical hydrogen charging
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While hydrogen has garnered attention as a clean energy source, its interaction with metals can lead to hydrogen embrittlement, potentially compromising structural integrity. In this study, slow strain-rate tensile tests were conducted under both ex-situ and in-situ electrochemical hydrogen charging conditions to investigate the hydrogen embrittlement behavior of STS 310S. The results showed that ex-situ charging minimized the mechanical degradation due to hydrogen desorption, whereas in-situ charging significantly reduced the notch tensile strength and elongation. Nevertheless, STS 310S exhibits excellent resistance to hydrogen embrittlement. Additionally, a thermal desorption analysis was performed to quantify the absorbed hydrogen concentration, with the diffusion mechanism evaluated based on Fick’s second law. The calculated hydrogen concentration profile indicated that the diffusion was primarily concentrated near the surface, potentially affecting the mechanical performance in localized regions.
Abstract
While hydrogen has garnered attention as a clean energy source, its interaction with metals can lead to hydrogen embrittlement, potentially compromising structural integrity. In this study, slow strain-rate tensile tests were conducted under both ex-situ and in-situ electrochemical hydrogen charging conditions to investigate the hydrogen embrittlement behavior of STS 310S. The results showed that ex-situ charging minimized the mechanical degradation due to hydrogen desorption, whereas in-situ charging significantly reduced the notch tensile strength and elongation. Nevertheless, STS 310S exhibits excellent resistance to hydrogen embrittlement. Additionally, a thermal desorption analysis was performed to quantify the absorbed hydrogen concentration, with the diffusion mechanism evaluated based on Fick’s second law. The calculated hydrogen concentration profile indicated that the diffusion was primarily concentrated near the surface, potentially affecting the mechanical performance in localized regions.