Hydrogen degradation of pre-oxidized zirconium alloys
| Autor: | Andrzej Zieliński, Waldemar Serbiński, A. Szoka, Jean-Marc Olive, Grzegorz Gajowiec, Agnieszka Ossowska |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Hydrogen Alloy Metallurgy Zirconium alloy Oxide Pharmaceutical Science chemistry.chemical_element Sulfuric acid 02 engineering and technology engineering.material Strain rate 021001 nanoscience & nanotechnology 01 natural sciences Cathodic protection chemistry.chemical_compound Complementary and alternative medicine chemistry 0103 physical sciences engineering Pharmacology (medical) Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Advances in Materials Science. 17:5-21 |
| ISSN: | 2083-4799 |
| DOI: | 10.1515/adms-2017-0001 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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