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<p>Materials capable of withstanding extreme conditions are essential for advanced fission and fusion technologies. The development of irradiation-tolerant structural materials hinges on the suppression of defect evolution that could lead to mechanical degradation. In this study, we present a novel strategy to effectively immobilize irradiation-induced defects through tuning the degree of local lattice distortion, an intrinsic characteristic of concentrated solid solution alloys. Our results show that increasing the degree of local lattice distortion significantly suppresses irradiation-induced microstructural changes. Notably, the single-phase binary Ni<sub>80</sub>Mo<sub>20</sub> alloy, which exhibits the highest recorded degree of local lattice distortion (4.82% atomic size mismatch), demonstrates markedly frozen defect motion, resulting in negligible irradiation-induced effects. Our findings suggest that irradiation-resistant materials can be developed by engineering local lattice distortion, offering an easy-to-manipulate pathway to designing irradiation-tolerant metallic alloys.</p>

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Realizing irradiation-resistant metallic alloys by immobilizing induced defects

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月15日

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  • Shasha Huang,
  • Zhengxiong Su,
  • Shihua Ma,
  • Baichuan Xu,
  • Haijun Fu,
  • Xuepeng Xiang,
  • Wenyu Lu,
  • Ailin Yang,
  • Zhongtao Li,
  • Sergei L. Dudarev,
  • Chenyang Lu,
  • Zhenggang Wu,
  • Shijun Zhao

摘要

Materials capable of withstanding extreme conditions are essential for advanced fission and fusion technologies. The development of irradiation-tolerant structural materials hinges on the suppression of defect evolution that could lead to mechanical degradation. In this study, we present a novel strategy to effectively immobilize irradiation-induced defects through tuning the degree of local lattice distortion, an intrinsic characteristic of concentrated solid solution alloys. Our results show that increasing the degree of local lattice distortion significantly suppresses irradiation-induced microstructural changes. Notably, the single-phase binary Ni80Mo20 alloy, which exhibits the highest recorded degree of local lattice distortion (4.82% atomic size mismatch), demonstrates markedly frozen defect motion, resulting in negligible irradiation-induced effects. Our findings suggest that irradiation-resistant materials can be developed by engineering local lattice distortion, offering an easy-to-manipulate pathway to designing irradiation-tolerant metallic alloys.