Thermal desorption spectroscopy evaluation of hydrogen-induced damage and deformation-induced defects

ABSTRACT

Thermal desorption spectroscopy (TDS) was performed on ultra-low carbon (ULC) steel with various degrees of hydrogen-induced damage and deformation-induced defects. First, the extent to which hydrogen-induced damage manifests itself in TDS measurements was evaluated. Application of multiple test conditions on cold deformed ULC steel with and without the presence of hydrogen-induced damage showed that such damage did not appear as a hydrogen signal on the TDS spectra. Second, interesting features observed on the TDS spectra of cold deformed ULC steel were further investigated by assessing the TDS spectra of recrystallised and annealed ULC steel. As such, the four peaks in the TDS spectra were linked to microstructural features: interstitial lattice positions, grain boundaries, dislocations and microvoids.

KEYWORDS:

• Ultra-low carbon steel
• thermal desorption spectroscopy
• blisters
• cold deformation
• hydrogen

Acknowledgements

A. Laureys would especially like to thank L. Claeys and M. Pinson for their efforts to help accomplish this work during her pregnancy. Additionally, the authors wish to thank the Agency for Innovation by Science and Technology in Flanders (IWT) for support (Project no. SB141399), the SB PhD fellow with project number SB1516618N, the postdoctoral fellowship via grant no. BOF01P03516 and the Special Research Fund (BOF), and UGent (BOF15/BAS/062).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Agentschap voor Innovatie door Wetenschap en Technologie: [Grant Number SB141399]; Bijzonder Onderzoeksfonds: [Grant Number BOF15/BAS/062]; Bijzonder Onderzoeksfonds: [Grant Number BOF01P03516]; Fonds Wetenschappelijk Onderzoek: [Grant Number SB1516618N].