Original scientific paper

The effect of deformation on the change of hydrogen diffusion in C-Mn-Si-P Trip 800 steel

P. Váňová ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
J. Sojka ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
T. Kulová ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
V. Vodárek ; VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic
M. Sozańska ; Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland
B. Chmiela ; Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland
J. Lelątko ; University of Silesia in Katowice, Faculty of Computer Science and Materials Science, Chorzów, Poland

Abstract

Hydrogen diffusion characteristics were studied in C - Mn - Si - P TRIP 800 steel. The steel was tested in as-received state and in states after 5 and 10 % tensile deformation. The steel microstructure consisted predominantly of ferrite, bainite and retained austenite. The tensile deformation resulted in a decrease of the retained austenite content. Hydrogen diffusion characteristics were studied by means of electrochemical permeation method for two current densities in build-up transients. Hydrogen diffusion coefficients of the studied TRIP steel varied from 1,6・10-7cm2・s-1 for the as-received state to 1,3・10-6 cm2・s-1 for the state after 5 % tensile deformation. The hydrogen diffusion coefficients increased markedly during the second build-up transient reflecting thus the fact that hydrogen trapping was less pronounced.

Keywords

TRIP steel; deformation; hydrogen; diffusion; electrochemical permeation method

Hrčak ID:

153620

URI

https://hrcak.srce.hr/153620

Publication date:

1.7.2016.

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