Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten

Guanze He; Hongbing Yu; Phani Karamched; Junliang Liu; Felix Hofmann

Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten

Materials Science 2022-11-21 v1

Authors: Guanze He , Hongbing Yu , Phani Karamched , Junliang Liu , Felix Hofmann

Abstract

Elastic interactions play an important role in controlling irradiation damage evolution, but remain largely unexplored experimentally. Using transmission electron microscopy (TEM) and high-resolution on-axis transmission Kikuchi diffraction (HR-TKD), we correlate the evolution of irradiation-induced damage structures and the associated lattice strains in self-ion irradiated pure tungsten. TEM reveals different dislocation loop structures as a function of sample thickness, suggesting that free surfaces limit the formation of extended defect structures found in thicker samples. HR-TKD strain analysis shows the formation of crystallographically-orientated long-range strain fluctuation above 0.01 dpa and a decrease of total elastic energy above 0.1 dpa.

Keywords

tungsten ion irradiation dislocation loops lattice strain transmission electron microscopy transmission kikuchi diffraction

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@article{arxiv.2211.10131,
  title  = {Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten},
  author = {Guanze He and Hongbing Yu and Phani Karamched and Junliang Liu and Felix Hofmann},
  journal= {arXiv preprint arXiv:2211.10131},
  year   = {2022}
}

Elastic Strain Associated with Irradiation-Induced Defects in Self-ion Irradiated Tungsten

Abstract

Keywords

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