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

Fu Gao Wei; Kaneaki Tsuzaki

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

Fu Gao Wei, Kaneaki Tsuzaki

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 language	English
Title of host publication	Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials
Pages	456-463
Number of pages	8
Publication status	Published - Dec 1 2009
Externally published	Yes
Event	2008 International Hydrogen Conference - Effects of Hydrogen on Materials - Jackson, WY, United States Duration: Sep 7 2008 → Sep 10 2008

Publication series

Name	Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials

Other

Other	2008 International Hydrogen Conference - Effects of Hydrogen on Materials
Country	United States
City	Jackson, WY
Period	9/7/08 → 9/10/08

All Science Journal Classification (ASJC) codes

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

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Hydrogen trapping character of nano-sized NbC precipitates in tempered martensite. / Wei, Fu Gao; Tsuzaki, Kaneaki.

Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials. 2009. p. 456-463 (Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Wei, FG & 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. Proceedings of the 2008 International Hydrogen Conference - Effects of Hydrogen on Materials, pp. 456-463, 2008 International Hydrogen Conference - Effects of Hydrogen on Materials, Jackson, WY, United States, 9/7/08.

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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.",

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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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