Hydrogen Trapping Behavior in Vanadium-added Steel

By H. Asahi, D. Hirakami, S. Yamasaki. 2003

176 citations recorded by the source corpus.

Hydrogen trapping and de-trapping behavior was investigated for steels with and without V. The de-trapping of hydrogen is very slow while the trapping presumably proceeds rapidly for steels containing VC precipitates. The activation energy for de-trapping is in the range of 33 to 35 kJ/mol. The trapped-hydrogen content and diffusible-hydrogen content in the steady state increase with increasing hydrogen entry rate into the steel. The density of hydrogen trapping sites decides the maximum trapped-hydrogen content; 9 ppm for 1 % V steel tempered at peak secondary hardening temperature. Analysis of hydrogen embrittlement cracking tests in terms of hydrogen contents such as the critical hydrogen content should be performed on the specimens with uniform hydrogen distribution and must consider the nature of hydrogen whether it is trapped or diffusible.

Subfields: Mechanical Engineering, Mechanics of Materials, Metals and Alloys

View Paper: https://www.semanticscholar.org/paper/3865959a796cd9c35348b73eba826e6ef3d9d4aa

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In Mechanical Engineering

In Mechanics of Materials

In Metals and Alloys

Citations in the corpus

Recent progress in microstructural hydrogen mapping in steels: Quantification, kinetic analysis, and multi-scale characterisation (2017, background): “The deuterium distribution at VC precipitates is stable during the measurement at 50–70K, sinceVCprecipitates act as hydrogen trap sites [72].”