Infusion of hydrogen into nanostructured bainitic steel.

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2017
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The trapping of hydrogen in nanostructured bainitic steel has been investigated using thermal desorption analysis, in order to determine the potency of the ferrite-retained austenite (α/γ) interfaces and retained austenite as trapping sites. Thermal desorption data showed that the volume of retained austenite is more effective in trapping hydrogen than the interfaces. There is a close correlation between the quantity of hydrogen and the retained austenite content rather than the density of interfaces. A local equilibrium model was able to reproduce the hydrogen desorption behaviour of saturated and unsaturated samples considering both retained austenite and α/γ interfaces as the trapping sites. A trap binding energy ranging from 47 to 52 kJ/mol was estimated for retained austenite, suggesting that the observed trapping capacity originates from the austenite lattice sites.
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Thermal desorption analysis, Trapping energy
Citação
COTA, A. B. Infusion of hydrogen into nanostructured bainitic steel. Materials Characterization, v. 134, p. 96-102, dez. 2017. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1044580317307696>. Acesso em: 16 jun. 2018.