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Abstract：
After the Fukushima nuclear accident, the development of new accident-tolerant fuel cladding materials has become a research hotspot around the world. Due to its outstanding corrosion resistance, radiation resistance, and creep properties at elevated temperatures, the oxide dispersion strengthened (ODS) FeCrAl alloy, as one of the most promising candidate materials for accident-tolerant fuel cladding, has been extensively studied during the past decade. Recent research on chemical composition design as well as its effects on the microstructure and mechanical properties has been reviewed in this paper. In particular, the reasonable/optimized content of Cr is explained from the aspects of oxidation resistance, radiation resistance, and thermal stability. The essential role of the Al element in oxidation resistance, high-temperature stability, and workability was reviewed in detail. The roles of oxide-forming elements, i.e., Y (Y2O3), Ti, and Zr, and the solid solution strengthening element, i.e., W, were discussed. Additionally, their reasonable contents were summarized. Typical types of oxide, i.e., Y-Ti-O, Y-Al-O, and Y-Zr-O, and their formation mechanisms were also discussed in this paper. All aspects mentioned above provide an important reference for understanding the effects of composition design parameters on the properties of nuclear-level ODS FeCrAl alloy.
摘要：
在福岛核事故之后,新型耐事故燃料包壳材料的开发已成为世界各国的研究热点。由于其突出的耐腐蚀性，耐辐射性，和高温下的蠕变性能，氧化物弥散强化(ODS)FeCrAl合金,作为最有希望的耐事故燃料包壳的候选材料之一，在过去的十年中被广泛研究。本文综述了化学成分设计及其对显微组织和力学性能的影响的最新研究。特别是,从抗氧化性方面解释了Cr的合理/优化含量，耐辐射性，和热稳定性。Al元素在抗氧化性中的重要作用,高温稳定性,并对可操作性进行了详细审查。氧化物形成元素的作用，即，Y(Y2O3),Ti,和Zr，和固溶强化元素，即，W,进行了讨论。此外,对其合理内容进行了总结。典型类型的氧化物，即，Y-Ti-O,Y-Al-O,Y-Zr-O,并对其形成机理进行了探讨。上述所有方面为理解成分设计参数对核级ODSFeCrAl合金性能的影响提供了重要参考。
