Assessment of hydrogen-induced cracking (HIC) susceptibility of V micro-alloyed wire rod steel with different heat treatments

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Different quenching and tempering heat treatments were applied on a vanadium micro-alloyed wire rod steel, to reach a tensile strength (Rm) of min. 1400 MPa for enhanced high strength screw production. SEM and TEM microstructural analyses showed high density of two precipitate types, i.e. needle-shaped M3C and vanadium rich, globular MX. MatCalc simulations were performed for calculating the precipitation kinetics, the size, number density and phase fraction. The validation showed good agreement in the case of M3C, while the size of MX is underestimated by MatCalc. To evaluate the relative susceptibility against HIC tensile specimens were charged with hydrogen (H) by cathodic polarization at -1.1V vs. Ag/AgCl electrode in an electrochemical cell containing a 3.5% NaCl - 0.1% thiourea solution during the Incremental Step Load Test according to ASTM 1624-12.
Original languageEnglish
Publication statusPublished - 2020
EventEUROCORR 2020 - Square - Brussels meeting centre, Virtuell, Belgium
Duration: 7 Sep 202011 Sep 2020


ConferenceEUROCORR 2020
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Fields of Expertise

  • Advanced Materials Science

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