Effects of the microstructure and reversed austenite on the hydrogen embrittlement susceptibility of Ni-Cr-Mo-V/Nb high-strength steel

  • Chao Hai
  • , Yuetong Zhu
  • , Endian Fan
  • , Cuiwei Du*
  • , Xuequn Cheng
  • , Xiaogang Li
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of the microstructure and reversed austenite (RA) on the hydrogen embrittlement (HE) behavior were investigated in NiCrMoV/Nb high-strength steel prepared using three different heat treatments. The quenching and tempering (QT) steel showed a noble HE resistance for the lowest hydrogen diffusion and maximum apparent hydrogen concentration compared to quenching (Q) steel and quenching, lamellarizing, and tempering (QLT) steel. Thermal desorption spectroscopy (TDS) analysis confirmed that RA had an activation energy of 32.5 kJ/mol which indicates a stable trapping site. The QLT steel containing more RA exhibited a higher HE susceptibility, suggesting that RA degrades the HE resistance.

Original languageEnglish
Article number111164
JournalCorrosion Science
Volume218
DOIs
StatePublished - 1 Jul 2023
Externally publishedYes

Keywords

  • Heat treatment
  • Hydrogen embrittlement
  • Reversed austenite
  • TDS

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