The effects of irradiation on CrMnFeCoNi high-entropy alloy and its derivatives
The effects of irradiation on CrMnFeCoNi high-entropy alloy and its derivatives
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DOI：
10.1016/j.pmatsci.2021.100807
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发表时间：
2021-04
影响因子：
37.4
通讯作者：
Zhouran Zhang;D. Armstrong;P. Grant
中科院分区：
文献类型：
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作者：
Zhouran Zhang;D. Armstrong;P. Grant
高熵合金（HEAs），基于通常四种或更多种元素的等原子或近等原子混合物，已经引起了相当大的关注，因为有迹象表明，沿着一些合金令人惊讶的微观结构简单性，它们还可以提供有趣的机械和其他性能的组合。在这些属性中，有越来越多的兴趣在HEAs的辐照响应和它们的潜力，以承受未来民用核电站的中子轰击环境。首先提出的HEAs之一是面心立方CrMnFeCoNi，也被称为康托合金，和辐照响应的康托合金及其子系统是本次审查的重点。使用辐照模拟（电子，重离子和他）中子轰击和考虑模拟，先进的微观结构分析和性能测量，康托合金及其衍生物显示出令人鼓舞的耐辐照性，在许多情况下，是上级更传统的稀释合金相同的元素。有利的方面是高的相稳定性和对辐射诱导的偏析的抗性、位错环的较小尺寸但较高的数密度、显著较低的溶胀程度和改善的对He气泡生长的抗性。最后提出了抗辐照高性能换热器的研究方向。
High-entropy alloys (HEAs), based on equiatomic or near-equiatomic mixture of usually four or more elements, have attracted considerable attention as there are indications that along with surprising microstructural simplicity of some alloys, they may also offer intriguing combinations of mechanical and other properties. Amongst these properties, there is growing interest in the irradiation response of HEAs and their potential to withstand the neutron bombardment environment of future civil nuclear power plants. One of the first proposed HEAs is face-centred cubic CrMnFeCoNi, also known as the Cantor alloy, and the irradiation response of the Cantor alloy and its sub-systems are the focus of this review. Using irradiation analogues (electrons, heavy ions and He) to neutron bombardment and considering simulations, advanced microstructural analysis and property measurement, the Cantor alloy and its derivatives are shown to exhibit encouraging irradiation resistance that, in many instances, is superior to more traditional dilute alloys of the same elements. The beneficial aspects are high phase stability and resistance to radiation-induced segregation, smaller size but higher number density of dislocation loops, significantly lower extent of swelling and improved resistance to He bubble growth. The future research directions for irradiation resistant HEAs are also suggested.