Irradiation hardening of WK-based PFM exposed to 14 MeV protons
Irradiation hardening of WK-based PFM exposed to 14 MeV protons
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DOI：
10.1016/j.fusengdes.2022.113379
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发表时间：
2023-02
影响因子：
1.7
通讯作者：
Pan Wen;Xunxiang Hu;Cuncai Fan;Yang Tan;W. Qiu;Tianyu Zhao;Shengyi Li;Chuan Wu;Juan Du-Juan
中科院分区：
文献类型：
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作者：
Pan Wen;Xunxiang Hu;Cuncai Fan;Yang Tan;W. Qiu;Tianyu Zhao;Shengyi Li;Chuan Wu;Juan Du-Juan
钨基合金被认为是最有前途的等离子体表面材料之一。在核聚变反应堆服役过程中，w基PFMs将受到14 MeV的聚变中子的辐照，造成严重的位移损伤和嬗变，辐照缺陷将严重影响其服役性能。辐照效应一直是核聚变反应堆中的一个关键问题，它关系到w基PFMs的性能和可靠性。在14MeV的质子照射下，WK-0.05Ti合金的显微硬度和纳米压痕特性观察到明显的辐照硬化。利用透射电镜分析了k泡诱导W-Re沉淀形成的机理。最后，结合理论计算和实验数据，解释了不同辐照深度下硬度值的变化规律。本研究阐明了k -气泡对w基pfm辐照过程中辐照缺陷演变的影响，揭示了不同深度下辐照硬化的潜在机制。此外，它有望为基于w基材料的坚固等离子体面向组件的研发提供额外的见解。
W-based alloys are perceived as one of the most promising plasma-facing materials (PFMs). During the service of fusion reactors, W-based PFMs will be exposed to 14 MeV fusion neutrons, causing significant displacement damage and transmutation, consequently, the irradiation-induced defects will seriously deteriorate its service performance. The irradiation effect is always a critical issue in fusion reactors and concerns the performance and reliability of W-based PFMs. In this work, WK-0.05Ti alloy was irradiated under 14MeV protons, and notable irradiation hardening was observed using microhardness and nanoindentation characterization. Then, the mechanism of W-Re precipitate formation induced by K-bubble was revealed using transmission electron microscopy. Finally, the variation of hardness values at different irradiation depths was explained based on theoretical calculations and experimental data. The present work elucidates the effect of K-bubbles on the evolution of irradiation defects in WK-based PFMs during irradiation and reveals the underlying mechanisms contributing to the irradiation hardening at different depths. Moreover, it is expected to provide additional insights into the R&D of robust plasma facing components based on WK-based materials.