Irradiation hardening of pure tungsten exposed to neutron irradiation
Irradiation hardening of pure tungsten exposed to neutron irradiation
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DOI：
10.1016/j.jnucmat.2016.08.024
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发表时间：
2016-11-01
影响因子：
3.1
通讯作者：
Katoh, Yutai
中科院分区：
文献类型：
--
作者：
Hu, Xunxiang;Koyanagi, Takaaki;Katoh, Yutai
纯钨样品在90-850℃至0.03-2.2 dpa的高频红外中进行了中子辐照。利用已有的显微组织数据建立了离散势垒硬化模型，并对硬度进行了预测。将模型预测值与维氏硬度计的实测值进行比较，揭示了在不同辐照条件下的主要硬化贡献。结果表明，辐照后的钨样品在低剂量区(0.6dpa)的硬度增加是由空洞和位错环引起的。在HFIR辐照下，析出相贡献最为显著，而辐照诱导的缺陷团簇结构可以合理地解释JMTR和Joyo的快中子能谱中观察到的钨的整体硬度增加。(C)2016爱思唯尔B.V.保留所有权利。
Pure tungsten samples have been neutron irradiated in HFIR at 90-850 degrees C to 0.03-2.2 dpa. A dispersed barrier hardening model informed by the available microstructure data has been used to predict the hardness. Comparison of the model predictions and the measured Vickers hardness reveals the dominant hardening contribution at various irradiation conditions. For tungsten samples irradiated in HFIR, the results indicate that voids and dislocation loops contributed to the hardness increase in the low dose region (0.6 dpa). The precipitate contribution is most pronounced for the HFIR irradiations, whereas the radiation-induced defect cluster microstructure can rationalize the entirety of the hardness increase observed in tungsten irradiated in the fast neutron spectrum of Joyo and the mixed neutron spectrum of JMTR. (C) 2016 Elsevier B.V. All rights reserved.