Hydrogen trapping character of nano-sized NbC precipitates in tempered martensite

Fu Gao Wei, Kaneaki Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

29 Citations (Scopus)

Abstract

The hydrogen trapping character of NbC nano-particles in a 0.05C-0.41Nb-2.0Ni tempered martensitic steel was investigated by hydrogen thermal-desorption spectrometry (TDS) analysis and atomic-level microstructural observation. The steel trapped the most hydrogen after tempering at 600 °C, and the trapped hydrogen decreased with increasing tempering temperature. The precipitation of NbC nanoparticles is responsible for the sharp increase at 600 °C. The coarsening of precipitates reduces the amount of trapped hydrogen. The TDS analysis of the same specimen charged with various levels of hydrogen concentration indicated that the apparent activation energy for desorption from NbC precipitates is dependent on hydrogen concentration. Hydrogen trap sites are discussed in terms of the character of the NbC/matrix interface and the crystal defects present at and around the interface.

Original languageEnglish
Title of host publicationProceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials
Pages456-463
Number of pages8
Publication statusPublished - Dec 1 2009
Externally publishedYes
Event2008 International Hydrogen Conference - Effects of Hydrogen on Materials - Jackson, WY, United States
Duration: Sep 7 2008Sep 10 2008

Publication series

NameProceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials

Other

Other2008 International Hydrogen Conference - Effects of Hydrogen on Materials
CountryUnited States
CityJackson, WY
Period9/7/089/10/08

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All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Wei, F. G., & Tsuzaki, K. (2009). Hydrogen trapping character of nano-sized NbC precipitates in tempered martensite. In Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials (pp. 456-463). (Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials).