Low activation high entropy alloys for next generation nuclear applications
Low activation high entropy alloys for next generation nuclear applications
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DOI：
10.1016/j.mtla.2018.09.014
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发表时间：
2018-12-01
期刊：
影响因子：
3.4
通讯作者：
Mukherjee, Sundeep
中科院分区：
文献类型：
--
作者：
Ayyagari, Aditya;Salloom, Riyadh;Mukherjee, Sundeep
综合实验和分子动力学方法用于开发低活化高熵合金，对下一代核反应堆应用具有潜在的吸引力。这些合金是基于高熵相形成的概念，由具有本征低活度的元素组成，即Ta-Ti-V-Zr-X (X = Hf或W)，成分为等摩尔比。分子动力学预测了Ta-Ti-V-Zr-Hf合金的均相形成。相反，Ta-Ti-V-Zr-W有Ta-W原子对聚集的趋势，这与熔融铸造和均匀化后的微观结构一致。两种合金均表现出稳定的显微组织和较高的硬度，在300℃时仍能保持较高的硬度。
An integrated experimental and molecular dynamics approach was used for developing low-activation high entropy alloys, potentially attractive for next generation nuclear reactor applications. These alloys were based on the concept of high entropy phase formation from a palette of elements with intrinsic low activity, namely Ta-Ti-V-Zr-X (X = Hf or W), with constituents in equimolar proportions. Molecular dynamics predicted homogenous alloy formation for Ta-Ti-V-Zr-Hf. In contrast, a tendency for Ta-W atomic-pair clustering was seen for Ta-Ti-V-Zr-W, in agreement with microstructure after melt-casting and homogenization. Both alloys showed stable microstructure with high hardness, which was retained up to 300 degrees C.