Novel α+β Zr Alloys with Enhanced Strength
| Autor: | Veverková, Anna, Preisler, Dalibor, Zimina, Mariia, Košutová, Tereza, Harcuba, Petr, Janeček, Miloš, Stráský, Josef |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:QH201-278.5
zirconium alloys lcsh:T microstructure mechanical properties neutron cross-section lcsh:Technology Article lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) lcsh:Microscopy lcsh:TK1-9971 scanning electron microscopy lcsh:QC120-168.85 |
| Zdroj: | Materials, Vol 14, Iss 418, p 418 (2021) Materials |
| ISSN: | 1996-1944 |
| Popis: | Low-alloyed zirconium alloys are widely used in nuclear applications due to their low neutron absorption cross-section. These alloys, however, suffer from limited strength. Well-established guidelines for the development of Ti alloys were applied to design new two-phase ternary Zr alloys with improved mechanical properties. Zr-4Sn-4Nb and Zr-8Sn-4Nb alloys have been manufactured by vacuum arc melting, thermo-mechanically processed by annealing, forging, and aging to various microstructural conditions and thoroughly characterized. Detailed Scanning electron microscopy (SEM) analysis showed that the microstructural response of the alloys is rather similar to alpha + beta Ti alloys. Duplex microstructure containing primary alpha phase particles surrounded by lamellar alpha + beta microstructure can be achieved by thermal processing. Mechanical properties strongly depend on the previous treatment. Ultimate tensile strength exceeding 700 MPa was achieved exceeding the strength of commercial Zr alloys for nuclear applications by more than 50%. Such an improvement in strength more than compensates for the increased neutron absorption cross-section. This study aims to exploit the potential of alpha + beta Zr alloys for nuclear applications. |
| Databáze: | OpenAIRE |
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