Hydrogen Susceptibility of Nanostructured Bainitic Steels

Nanostructured steels with an ultimate tensile strength of 1.6 GPa were produced with austenite content varying from 0 to 35 vol pct. The effect on the mechanical properties was assessed after saturating the steel with hydrogen. Elongation was reduced to 2 to 5 pct and UTS to 65 to 70 pct of prior v...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2016-02, Vol.47 (2), p.718-725
Main Authors: Peet, Mathew James, Hojo, Tomohiko
Format: Article
Language:English
Subjects:
Austenite
Characterization and Evaluation of Materials
Chemistry and Materials Science
Grain boundaries
Hydrogen
Materials Science
Metallic Materials
Metallurgy
Nanostructure
Nanostructured materials
Nanotechnology
Physical metallurgy
Steel
Steels
Structural Materials
Surfaces and Interfaces
Thin Films
Ultimate tensile strength
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Summary:Nanostructured steels with an ultimate tensile strength of 1.6 GPa were produced with austenite content varying from 0 to 35 vol pct. The effect on the mechanical properties was assessed after saturating the steel with hydrogen. Elongation was reduced to 2 to 5 pct and UTS to 65 to 70 pct of prior value. Thermal desorption measurements confirmed the higher solubility of hydrogen in the steel with higher austenite content. The level of hydrogen saturation was found to correlate to the total area of grain boundaries rather than to the volume fraction of retained austenite.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-015-3221-9