| Autor: |
Jong-Hyuk Baek, Sun-Doo Kim, Hyun-Gil Kim, Young-Hwan Jeong |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Journal of Nuclear Materials. 372:304-311 |
| ISSN: |
0022-3115 |
| DOI: |
10.1016/j.jnucmat.2007.03.259 |
| Popis: |
The corrosion characteristics of Zr-based alloys are very sensitive to their microstructures which are determined by the β-annealing conditions. Specimens of Zr–1.5Nb–0.4Sn–0.2Fe–0.1Cr alloy were investigated in order to obtain their optimized β-annealing conditions such as the β-annealing temperature and the cooling rate from the β-region. From the microstructural analysis, the prior β-grain size of this alloy was increased by increasing the β-annealing temperature. The martensitic structure was formed by a fast cooling rate of a water quenching from a range of 960–1200 °C and the Widmanstatten structure was formed by a slow cooling rate of an air cooling from 1050 °C. The corrosion behavior of the Zr–1.5Nb–0.4Sn–0.2Fe–0.1Cr alloy was not affected by the β-annealing temperature but it was changed by the cooling rate. The increased corrosion resistance was caused by a decreased the supersaturated Nb content in the matrix by a formation of the β-Zr phase. However, the formation of the β-Zr phase is not recommended in the β-solution annealing procedure of Nb-containing Zr-based alloy, because the aim of the β-solution annealing is to obtain a good homogeneity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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