Outstanding radiation resistance of reduced-activation VCrMnFe based high-entropy alloy

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2025-06-01 Epub Date: 2025-03-08 DOI:10.1016/j.intermet.2025.108728

Feng Jiao Ye , Te Zhu , Qiao Li Zhang , Hai Liang Ma , Hai Biao Wu , Peng Zhang , Run Sheng Yu , Bao Yi Wang , Da Qing Yuan , Xing Zhong Cao

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Abstract

This study examines the irradiation resistance of a novel Ti₈V_22.5Cr_22.5Mn_22.5Fe_22.5Si₂ high-entropy alloy (HEA) through techniques such as scanning/transmission electron microscopy, positron annihilation spectroscopy, and grazing incidence X-ray diffraction. The results highlight an unusual lattice contraction upon irradiation, diverging from typical responses of traditional alloys, with no evidence of irradiation-induced precipitation. Under high-dose irradiation (∼188 dpa), the HEA displayed no discernible void swelling, potentially due to abundant precipitate interfaces, high equilibrium vacancy concentration, and the intrinsic properties of HEA. The HEA, exhibiting smaller dislocation loops (∼3.2 nm) and a lower irradiation hardening rate (∼3.3 %) compared to conventional alloys, demonstrates significant promise as a material for future-generation core components.

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基于还原活化 VCrMnFe 的高熵合金的出色抗辐射性能

通过扫描/透射电子显微镜、正电子湮灭光谱和掠入射x射线衍射等技术，研究了新型Ti8V22.5Cr22.5Mn22.5Fe22.5Si2高熵合金（HEA）的耐辐照性能。结果突出了辐照时不寻常的晶格收缩，与传统合金的典型响应不同，没有辐照诱导沉淀的证据。在高剂量（~ 188 dpa）照射下，HEA没有出现明显的空洞膨胀，这可能是由于丰富的沉淀界面、高平衡空位浓度和HEA的固有特性。与传统合金相比，HEA具有更小的位错环（~ 3.2 nm）和更低的辐照硬化率（~ 3.3%），显示出作为下一代核心部件材料的巨大前景。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.