241 / 2023-04-18 22:02:29
Fracture behaviors of long-term low-dose-rate neutron-irradiated Al-Mg-Si alloy
摘要录用
Ling Hu / China Academy of Engineering Physics; Institute of Fluid Physics
Jianbo Hu / Institute of Fluid Physics; China Academy of Engineering Physics
Here, we report on fracture behaviors of Al-Mg-Si alloys (LT21 Al alloys) decommissioned from a research reactor in service for 30 years. Microscopic characterizations show that the initial microstructures of the long-term low-dose-rate neutron-irradiated LT21 Al are dominated by a large number of micron-sized voids and second-phase particles, different from short-term high-dose-rate neutron-irradiated materials. Quasi-static tensile and shock spall experiments on the irradiated and unirradiated LT21 Al reveal considerable irradiation-induced softening (larger than 40%) in both the tensile and spall strength. We attribute the irradiation softening to the over-aging process promoted by irradiation enhanced diffusion during the long-term service. Postmortem characterizations on shock-recovered samples indicate that the long-term low-dose-rate neutron irradiation-induced microstructures (micron-sized voids and second-phase particles) facilitate nucleation and growth of dynamic damage in irradiated materials, thus playing an important role in change in facture behaviors.
重要日期
  • 会议日期

    06月05日

    2023

    06月09日

    2023

  • 04月30日 2023

    提前注册日期

  • 05月01日 2023

    摘要截稿日期

  • 05月01日 2023

    摘要录用通知日期

  • 05月01日 2023

    初稿截稿日期

  • 05月31日 2023

    注册截止日期

主办单位
等离子体物理重点实验室
北京师范大学天文系
承办单位
Matter and Radiation at Extremes期刊
中国工程物理研究院流体物理研究所
北京应用物理与计算数学研究所
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