http://scholars.ntou.edu.tw/handle/123456789/4668
標題: | Fracture properties of hydrided Zircaloy-4 cladding in recrystallization and stress-relief anneal conditions | 作者: | Hsiao-Hung Hsu Leu-Wen Tsay |
公開日期: | 三月-2012 | 卷: | 422 | 期: | 1-3 | 起(迄)頁: | 116-123 | 來源出版物: | Journal of Nuclear Materials | 摘要: | In this work, the stress-relieved (SRA) and recrystallized (RXA) Zircaloy-4 cladding specimens were hydrogen-charged to the target concentration of 300 wppm and then manufactured into X-specimens for fracture toughness test. The hydrogen embrittlement susceptibility of Zircaloy-4 cladding specimens in both SRA and RXA conditions were investigated. At the hydrogen concentration level of 300 wppm, J-integral values for RXA cladding were higher than those for SRA cladding at both 25 °C and 300 °C. The formation of brittle zirconium hydrides had a significant impact on the fracture toughness of Zircaloy-4 cladding in both SRA and RXA states, especially at 25 °C. Among all the tests, SRA cladding tested at 25 °C exhibited a great loss of the fracture toughness. The micrographic and fractographic observations further demonstrated that the fracture toughness of Zircaloy-4 cladding would be improved by the coarse grains in RXA cladding, but degraded by zirconium hydrides precipitated along the grain boundary. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/4668 | ISSN: | 0022-3115 | DOI: | 10.1016/j.jnucmat.2011.12.032 |
顯示於: | 光電與材料科技學系 |
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