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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses
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Effects of irradiation spectrum on the microstructural and mechanical properties of bulk metallic glasses

机译：辐照光谱对散装金属玻璃微观结构和力学性能的影响

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摘要

Zr52.5Cu17.9Ni14.6Al10Ti5 (BAM-11) and Cu60Zr20Hf10Ti10 bulk metallic glass (BMG) specimens were ion irradiated to characterize and compare their irradiation induced microstructural and mechanical property evolution. For the ion irradiations, samples of each BMG were exposed to 9 MeV Ni3+ and 5.5 MeV C+ ions to a midrange (similar to 1.5 mu m depth) dose of 0.5 displacements per atom (dpa) at temperatures ranging from room temperature to 360 degrees C in order to examine potential effects associated with low (5.5 MeV C) and high (9 MeV Ni) average primary knock on energies. BAM-11 BMG samples were also irradiated by neutrons (E > 0.1 MeV) at similar to 70 degrees C to a fluence of 1.4 x 10(20) n/cm(2) (dose of 0.1 dpa). Importantly, no pronounced irradiation spectrum effects were observed for the nanoindentation mechanical properties of the two BMGs following ion irradiation. However, significant softening was observed in the BAM-11 BMG sample irradiated by neutrons, while annealing of the unirradiated samples led to a marked increase in hardening. Results of the nanoindentation experiments indicate that softening is caused by irradiation induced creation of free volume defects, while the hardening is caused by their annihilation. (c) 2020 Elsevier B.V. All rights reserved.
机译：Zr52.5cu17.9ni14.6Al10Ti5（BAM-11）和CU60ZR20HF10TI10块状金属玻璃（BMG）样本被离子照射，以表征和比较它们的辐射诱导的微观结构和机械性能演化。对于离子照射，每个BMG的样品暴露于9mEV Ni3 +和5.5meV C +离子，以在室温到360℃的温度范围内（DPA）的0.5个位移（DPA）的中谐（类似于1.5μmm）剂量。为了检查与低（5.5meV c）和高（9mev ni）平均主要敲击能量相关的潜在效果。由中子（E> 0.1MeV）照射Bam-11 BMG样品，其与70℃的注量为1.4×10（20）n / cm（2）（剂量为0.1dPa）。重要的是，对于离子照射后两种BMG的纳米肾脏机械性能没有观察到明显的照射光谱效应。然而，在由中子照射的Bam-11 BMG样品中观察到显着的软化，同时，未照射的样品的退火导致硬化的显着增加。纳米狭窄实验的结果表明，软化是由辐照引起的产生自由体积缺陷引起的，而硬化是由其湮灭引起的。 （c）2020 Elsevier B.v.保留所有权利。

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