<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The presence of the oxide layers on Zr alloys may retard or enhance the hydrogen entry and material degradation, depending on the layer features. This research has been aimed to determine the effects of pre-oxidation of the Zircaloy-2 alloy at a different temperature on hydrogen degradation. The specimens were oxidised in laboratory air at 350°C, 700°C, and 900°C. After, some samples were tensed at 10-5 strain rate and simultaneously charged with hydrogen under constant direct voltage in 1 N sulfuric acid at room temperature. Other specimens were charged without any tension, then annealed at 400°C for 4 h and finally tensed at above strain rate. The SEM examinations were performed on the cross-sections and fracture faces of specimens. The obtained results demonstrate the effects of the oxide layer on the cathodic current and hydrogen entry, mechanical properties and the appearance of hydrides and fracture behaviour.</p></abstract>

The presence of the oxide layers on Zr alloys may retard or enhance the hydrogen entry and material degradation, depending on the layer features. This research has been aimed to determine the effects of pre-oxidation of the Zircaloy-2 alloy at a different temperature on hydrogen degradation. The specimens were oxidised in laboratory air at 350°C, 700°C, and 900°C. After, some samples were tensed at 10-5 strain rate and simultaneously charged with hydrogen under constant direct voltage in 1 N sulfuric acid at room temperature. Other specimens were charged without any tension, then annealed at 400°C for 4 h and finally tensed at above strain rate. The SEM examinations were performed on the cross-sections and fracture faces of specimens. The obtained results demonstrate the effects of the oxide layer on the cathodic current and hydrogen entry, mechanical properties and the appearance of hydrides and fracture behaviour.

Hydrogen degradation of pre-oxidized zirconium alloys

Gdansk University of Technology, Faculty of Mechanical Engineering, Department of Materials Engineering and Bonding, 11/12 Narutowicza, 80-233 Gdańsk,

Universite de Bordeaux, Institute de Mecanique et des Materiaux, 33000 Bordeaux,

Advances in Materials Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Hydrogen degradation of pre-oxidized zirconium alloys"}

The presence of the oxide layers on Zr alloys may retard or enhance the hydrogen entry and material degradation, depending on the layer features. This research...

Hydrogen degradation of pre-oxidized zirconium alloys

Published Online: Apr 22, 2017

Page range: 5 - 21

DOI: https://doi.org/10.1515/adms-2017-0001

Keywords
zirconium alloys, oxidation, hydrogen degradation, slow strain rate tests, cathodic hydrogen charging

© by A. Zieliński

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Hydrogen degradation of pre-oxidized zirconium alloys

Published Online: Apr 22, 2017

Page range: 5 - 21

DOI: https://doi.org/10.1515/adms-2017-0001

Keywordszirconium alloys, oxidation, hydrogen degradation, slow strain rate tests, cathodic hydrogen charging

© by A. Zieliński

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
zirconium alloys, oxidation, hydrogen degradation, slow strain rate tests, cathodic hydrogen charging