Nanocluster evolution and mechanical properties of ion irradiated T91 ferritic-martensitic steel
Nanocluster evolution and mechanical properties of ion irradiated T91 ferritic-martensitic steel
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DOI：
10.1016/j.jnucmat.2021.152842
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发表时间：
2021-02-06
影响因子：
3.1
通讯作者：
Armstrong, D. E. J.
中科院分区：
文献类型：
--
作者：
Davis, T. P.;Auger, M. A.;Armstrong, D. E. J.
在301-311℃，Fe4+离子辐照至4.10 dpa的工业级T91铁素体-马氏体钢，用离子辐照研究了辐照诱导纳米团簇的析出和力学性能的变化。用原子探针层析分析了组织偏析和团簇的形成，用纳米压痕测量了力学性能的变化。在0.12 dpa时，观察到富Si/P团簇的形成。在1.76 dpa时，观察到富Mn、Ni和Si的析出物(MNSP)，其成分范围与通常引用的G相明显不同。在相同的温度下，MNSP的数密度与以前的中子辐照研究结果相似。还讨论了这些物种向位错环和位错线的偏析。硬度随辐射剂量的增加而增加，最高可达1.83。对观察到的显微组织和力学性能随离子辐照剂量的变化进行了比较。APT和纳米压痕的使用，当同时应用时，已经显示出对辐射诱导的微结构效应如何解释观察到的机械性能变化的洞察。(C)2021年爱思唯尔B.V.保留所有权利。
Ion irradiation has been used to investigate the radiation-induced precipitation of nanoclusters and changes in mechanical properties of commercial-grade T91 ferritic-martensitic steel irradiated with Fe4+ ions up to 4.10 dpa at 301 - 311 degrees C. Atom probe tomography was used to analyse the microstructure segregation and cluster formation, while nanoindentation was used to measure the change in mechanical properties. At 0.12 dpa, Si/P-rich clusters formation is observed. At 1.76 dpa, Mn, Ni and Si -rich precipitates (MNSP) were observed with a composition range that is distinctly different than the typically cited G-phase. The MNSP number density was similar to that from prior neutron irradiation studies at similar temperatures. Segregation of such species to dislocation loops and lines was also discussed. The hardness increased with radiation dose up to measured 1.83. Comparisons were made between the observed microstructural and mechanical property changes as a function of ion irradiated dose. The use of APT and nanoindentation, when applied in tandem, have shown to provide an insight into how radiation-induced microstructural effects can explain the observed changes in mechanical properties. (C) 2021 Elsevier B.V. All rights reserved.