Abstract
A model for hydrogen trapping of particle-matrix interface was suggested, in which the large driving force for such hydrogen trapping was associated with the lowering of interfacial free energy. The effects of the character of the precipitated TiC-matrix interface on the hydrogen trapping behavior in steel was studied by utilizing the hydrogen thermal analysis technique. Incoherent titanium carbides have a larger trap activation energy of hydrogen than semi-coherent ones. Although the particles are incoherent, the trap activation energy of hydrogen increases with increasing the precipitated particle size.
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