Irradiation-induced swelling and hardening in HfNbTaTiZr refractory high-entropy alloy
Irradiation-induced swelling and hardening in HfNbTaTiZr refractory high-entropy alloy
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HfNbTaTiZr耐火高熵合金的辐照膨胀与硬化
DOI：
10.1016/j.matlet.2020.127832
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发表时间：
2020-08-01
影响因子：
3
通讯作者：
Liang, Jenq-Horng
中科院分区：
文献类型：
--
作者：
Chang, Stanley;Tseng, Ko-Kai;Liang, Jenq-Horng
耐火高熵合金（RHEAs）具有上级耐辐射性能，其晶格畸变和扩散动力学特性使其成为核材料和航空航天材料的候选材料。为了研究体心立方（BCC）RHEAs的辐照行为，在100 ℃下用300 keV Ni+以1.5 x 10（16）cm（-2）的注量辐照试样，达到超过30个位移/原子（dpa）的高损伤水平。结果表明，与常规核材料相比，膨胀和硬化效应被显著抑制。进一步的微观结构表征表明，损伤范围远远超过模拟结果和注入物种的范围。(C)2020 Elsevier B. V.保留所有权利。
The lattice distortion and diffusion kinetics of refractory high-entropy alloys (RHEAs), which may be endowed with superior radiation tolerance, render RHEAs candidate materials for nuclear and aerospace systems. To investigate the irradiation behavior of body-centered cubic (BCC) RHEAs, the specimens were irradiated by 300 keV Ni+ to a fluence of 1.5 x 10(16) cm(-2) at 100 degrees C, reaching a high damage level to over 30 displacements per atom (dpa). The results revealed that the swelling and hardening effects were significantly suppressed compared to those of conventional nuclear materials. Further microstructural characterization showed that the damage range far exceeded the simulated results and the range of implanted species. (C) 2020 Elsevier B.V. All rights reserved.