Effects of neutron irradiation on the tensile properties of high-Cr oxide dispersion strengthened ferritic steels
Effects of neutron irradiation on the tensile properties of high-Cr oxide dispersion strengthened ferritic steels
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DOI：
10.1016/j.jnucmat.2007.03.140
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发表时间：
2007-08
影响因子：
3.1
通讯作者：
H. Cho;R. Kasada;A. Kimura
中科院分区：
文献类型：
--
作者：
H. Cho;R. Kasada;A. Kimura
研究了中子辐照对氧化物弥散强化铁素体钢拉伸性能的影响。用机械合金化方法生产了含14~22wt%Cr和4.5wt%Al或不含Al的各种ODS钢。为了研究其对中子辐照硬化和脆化的敏感性，在290、400和600°C的JMTR中分别进行了剂量分别为0.01、0.3和0.75dpa的辐照。在照射前和照射后的RT下进行拉伸试验。在透射电子显微镜下进行了显微组织观察。结果表明，在290℃和400℃辐照后，高铬ODS钢表现出显著的硬化效果，而600℃辐照后，硬化效果不明显，但辐照硬化并不伴随总延伸率的降低。400℃辐照后，硬化度随铬浓度的增加而增加，而290℃和600℃辐照后，硬化度几乎不随铬浓度的变化而变化。
The effects of neutron irradiation on the tensile properties of oxide dispersion strengthened (ODS) ferritic steels have been investigated. Various ODS steels containing 14–22wt% Cr and 4.5wt% Al or no Al were produced by mechanical alloying. In order to investigate their susceptibility to hardening and embrittlement induced by neutron irradiation, the ODS steels were irradiated in JMTR at 290, 400 and 600°C up to doses of 0.01, 0.3 and 0.75dpa, respectively. Tensile tests were performed at RT before and after irradiation. Microstructure observations were conducted in TEM. It was found that high-Cr-ODS steels show a significant hardening after irradiation at 290 and 400°C, while no effect was observed after irradiation at 600°C. The irradiation hardening, however, is not accompanied by a reduction of total elongation. After irradiation at 400°C the measured hardening increases with Cr concentration, while it is almost constant versus Cr concentration after irradiation at 290 and 600°C.