Effect of neutron irradiation on rhenium cluster formation in tungsten and tungsten-rhenium alloys
Effect of neutron irradiation on rhenium cluster formation in tungsten and tungsten-rhenium alloys
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DOI：
10.1016/j.jnucmat.2018.04.031
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发表时间：
2018-08-15
影响因子：
3.1
通讯作者：
Nogami, Shuhei
中科院分区：
文献类型：
--
作者：
Hwang, Taehyun;Hasegawa, Akira;Nogami, Shuhei
为了阐明中子辐照钨（W）的辐照硬化行为，采用原子探针层析成像（APT）技术研究了裂变堆环境中富Re团簇和W-Re沉淀的形成行为，并与透射电镜（TEM）显微结构观察结果进行了比较。中子辐照纯W和W-10 Re合金用于分析。这些样品在快速实验反应堆Joyo中在538摄氏度下被辐照至0.96 dpa，并且在混合光谱反应堆HFIR中在500摄氏度下被辐照至0.90 dpa。通过AP分析确定了基体、Re团簇和沉淀物的化学组成。Joyo辐照样品中含有较低水平的嬗变Re和Os，而HFIR辐照样品中含有较高水平的Re和Os。富集Re的团簇表现出与每个辐照样品中的缺陷团簇分布相关的特征空间分布。(C)2018爱思唯尔B. V.保留所有权利。
To clarify the irradiation hardening behavior of neutron-irradiated tungsten(W), the formation behavior of rhenium(Re)-enriched cluster and W-Re precipitation with displacement damage in fission reactors environment was investigated by the atom probe tomography (APT) technique, and the results obtained by APT and microstructural observation by transmission electron microscopy (TEM) were compared. Neutron-irradiated pure W and W-10Re alloys were used for the analysis. These samples were irradiated to 0.96 dpa at 538 degrees C in a fast experimental reactor Joyo, and irradiated to 0.90 dpa at 500 degrees C in a mixed spectrum reactor HFIR. The chemical compositions of the matrix, Re clusters, and precipitates were determined by the AP analysis. The Joyo-irradiated samples contained lower levels of transmuted Re and Os, while the HFIR-irradiated samples contained higher levels of Re and Os. The Re-enriched clusters demonstrated characteristic spatial distribution related to defect cluster distribution in each irradiated specimen. (C) 2018 Elsevier B.V. All rights reserved.