Microstructural evolution in vanadium alloys by fast neutron irradiation
Microstructural evolution in vanadium alloys by fast neutron irradiation
复制标题
快中子辐照钒合金的微观结构演化
DOI：
10.1016/0022-3115(93)90109-c
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发表时间：
1993
影响因子：
3.1
通讯作者：
S. Yoshida
中科院分区：
文献类型：
--
作者：
H. Matsui;H. Nakajima;S. Yoshida
最近发现一些钒合金表现出巨大的膨胀量。大多数这些高膨胀合金的共同因素是它们具有作为合金元素的较小溶质。在以前的论文中已经讨论了几种可能的大肿胀机制，但解释仍然没有定论。为了阐明所观察到的大溶胀的机制，在JOYO中在400、500和600°C下辐照到4.6和14 dpa之间的位移水平后，通过电子显微镜检查了几种钒基二元合金中微观结构的演变。在所研究的合金中，在约14 dpa的损伤水平下，在V-5 at% Fe合金中观察到最大溶胀，并且在600°C下高达30%。具有过大溶质的合金仅显示有限量的溶胀。进行了详细的显微组织检查，发现除了V-1%Si外，位错Burgers矢量与溶质原子尺寸因子存在系统差异。根据两组合金中观察到的微观结构差异，讨论了大溶胀的机制。
Some of the vanadium alloys have been found recently to exhibit enormous amount of swelling. The factor common to most of these high-swelling alloys is that they have undersized solutes as alloying elements. Several possible mechanisms for the large swelling have been discussed in previous papers, while the interpretation is still not conclusive. In order to clarify the mechanism of the observed large swelling, the evolution of microstructure in several vanadium-based binary alloys has been examined by electron microscopy after irradiation at 400, 500 and 600°C in JOYO to displacement levels between 4.6 and 14 dpa. Among the alloys studied, the maximum swelling at the damage level of approximately 14 dpa was observed in the V-5 at% Fe alloy and was as high as 30% at 600°C. Alloys with oversized solutes show only limited amounts of swelling. Detailed microstructural examination has been conducted and it has been found that there is a systematic difference in the dislocation Burgers vectors with solute atomic size factor, with the exception of V-1% Si. The mechanism of the large swelling is discussed in terms of the observed microstructural differences in the two groups of alloys.