Effect of temperature change on microstructural evolution of vanadium alloys under neutron irradiation in JMTR
Effect of temperature change on microstructural evolution of vanadium alloys under neutron irradiation in JMTR
复制标题
JMTR中子辐照下温度变化对钒合金显微组织演化的影响
DOI：
10.1016/s0022-3115(98)00720-x
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发表时间：
1999
影响因子：
3.1
通讯作者：
H. Matsui
中科院分区：
文献类型：
--
作者：
N. Nita;K. Fukumoto;A. Kimura;H. Matsui
近年来，研究人员指出，在中子辐照下，温度变化对材料微观结构演变的影响是非常复杂的。本文研究了钒合金在温度变化的各个阶段的组织演变，分析了多次温度循环后的影响。在JMTR中进行中子辐照，温度向上变化。对钒合金进行了TEM观察、显微维氏硬度测试和正电子湮没寿命谱分析。在220℃的辐照过程中，许多细小的缺陷已成核。在温度上升到420℃后，它们长大了。另一方面，在340/530℃温度组合下辐照后，显微组织基本保持不变。含钛钒合金表现出不同的趋势；与其他合金不同的是，在这些合金中通过透射电镜发现了许多辐射诱发的沉淀。
Recently, it has been pointed out that the effect of varying temperature on microstructural evolution in materials under neutron irradiation can be very complicated. In this paper, evolution of microstructure in vanadium alloys in each step of temperature changes is closely examined in order to analyze the effects after several temperature cycles. Neutron irradiation was performed in JMTR with an upward temperature change. TEM observation, micro-Vickers hardness test and positron annihilation lifetime spectroscopy have been carried out on vanadium alloys. During the irradiation at 220°C, a lot of small defects have nucleated. They grew up after the upward temperature step to 420°C. On the other hand, microstructure remained essentially the same in the irradiation at 340/530°C temperature combination. Vanadium alloys containing titanium show different tendencies; unlike other alloys, a number of radiation induced precipitates were found by TEM in these alloys.