Evaluation of the Effect of TiC Precipitates on the Hydrogen Trapping Capacity of Fe-C-Ti Alloys

Abstract:

The present work evaluates the hydrogen trapping behavior of different laboratory cast generic Fe-C-Ti martensitic alloys. Titanium carbides were precipitated in the materials by well-designed heat treatments. A quenched and tempered martensitic matrix with final strength above 1000 MPa was aimed for and verified by means of hardness measurements. Tempering allowed generating precipitates with different characteristics in terms of coherency, size and distribution due to the secondary hardening effect, as was evaluated by transmission electron microscopy. The hydrogen trapping capacity of the TiC precipitates was investigated by thermal desorption spectroscopy, while melt extraction was performed to determine the amount of hydrogen present after cathodic hydrogen charging. Generally, it could be concluded that the incoherent particles in the quenched material were not able to trap hydrogen, whereas the quenched and tempered material trapped hydrogen at the interface of small probably coherent TiC.

• Periodical: Advanced Materials Research (Volume 922)
• Pages: 102-107
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.922.102
• Online since: May 2014
• Authors: Tom Depover*, E. van den Eeckhout, E. Wallaert, Z. Zermout, Kim Verbeken
• Keywords: Hydrogen Charging Capacity, TDS, TiC, Trapping Capacity

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