In-situ TEM characterization of the tensile deformation of ion-irradiated HT-UPS steel at RT and 400 °C
Source abstract
Abstract
Abstract High-temperature ultra-fine precipitate strengthened (HT-UPS) steel samples were irradiated with 1 MeV Kr ions, and in-situ tensile deformed at room temperature (RT) and 400 °C. The dislocation flow in irradiated samples was significantly restricted by the irradiation defects, and the deformation took place in localized deformation bands. While in unirradiated specimens, the deformation happened evenly across the grains. As a result of the localized deformation, intricate deformation band structures were observed in the irradiated specimens, which are composed of a central band and two defect reduced zones on the two sides. The irradiation defects were in-situ observed to interact with deformation induced dislocations, and were removed by the latter. Despite of the differences, the irradiated samples reserved similar work hardening behaviors as the unirradiated samples. The deformation inside the defect reduced bands in irradiated samples showed similar characteristics as in the unirradiated sample. The last stage deformation also showed similar deformation characteristics, regardless of the irradiation history.
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Research context
OpenAlex topics: Fusion materials and technologies · Microstructure and mechanical properties · Ion-surface interactions and analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
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