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http://dx.doi.org/10.7734/COSEIK.2022.35.6.325

Parametric Studies on Hydrogen Embrittlement in Liquified Hydrogen Tank using Molecular Dynamics Simulation  

Song-Hyun, Cha (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Hyun-Seok, Kim (Alternative Fuels and Power System Research Division, KRISO)
Seonho, Cho (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.35, no.6, 2022 , pp. 325-331 More about this Journal
Abstract
Hydrogen embrittlement in metals has been a serious issue with regard to structural safety. In this study, molecular dynamics simulations revealed that the aggregation of hydrogen atoms at the crack tips suppresses the dislocation emission and thus results in cleavage fracture. A series of molecular dynamics simulations were performed considering factors such as the concentration of hydrogen atoms, loading rate, and diffusion coefficient. We investigated the conditions that minimize hydrogen embrittlement. The simulation results were consistent with the experimental results and used to quantify hydrogen embrittlement.
Keywords
molecular dynamics; hydrogen embrittlement; dislocation emission; cleavage fracture;
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Times Cited By KSCI : 1  (Citation Analysis)
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