Fig.3 Hydrogen effects on the dislocation configurations of typical metals[33,37,39,42]: (a) bcc pure iron[33], in-situ electrochemical hydrogen charging with uniaxial tension, (b) fcc pure nickel[37], high pressure torsion after high-pressure hydrogen charging, (c) the ferritic-pearlitic low carbon steel (SS400)[39], in-situ fatigue loading under high pressure, (d) 316L austenitic stainless steel[42], fatigue loading after high-pressure hydrogen charging
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