TY - GEN
T1 - Hydrogen trapping character of nano-sized NbC precipitates in tempered martensite
AU - Wei, Fu Gao
AU - Tsuzaki, Kaneaki
PY - 2009/12/1
Y1 - 2009/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:77649105767
SN - 9781615030033
T3 - Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials
SP - 456
EP - 463
BT - Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials
T2 - 2008 International Hydrogen Conference - Effects of Hydrogen on Materials
Y2 - 7 September 2008 through 10 September 2008
ER -