Abstract
The electron backscatter diffraction (EBSD) characterization of irradiated Al-B shows that there is a high concentration defect region around the borides. Nanoscale speckle particles were successfully prepared on the surface of Al-B before and after irradiation, and then the mesoscale strain during in-situ deformation was obtained by digital image correlation (DIC) technique. The results shows that slip band bypass such an area through cross slips with slip band deflection. Transmission electron microscopy (TEM) indicates that abundant helium bubbles exist in the deflected slip band area pinning the dislocations.
Highlights
Neutron radiation damage seriously affects the structure and mechanical properties of materials in service, threatens the safety of reactor operation and increases the operating cost [1]
The experimental research in this field mainly focuses on the simulation of neutron irradiation by heavy ion irradiation, and the research scope is mostly limited to the nanoscale [4,5,6], and the application of experimental results at the macro scale is very limited
It is urgent to carry out the research on the effect of neutron irradiation on metal deformation mechanism at the mesoscopic scale
Summary
Neutron radiation damage seriously affects the structure and mechanical properties of materials in service, threatens the safety of reactor operation and increases the operating cost [1]. Due to the limitations of experimental conditions, the research on the effects of reactor neutron irradiation on the mechanical properties of materials is mainly focused on the molecular dynamics simulation calculation [2, 3], and its applicability in the real irradiation environment has yet to be confirmed. The experimental research in this field mainly focuses on the simulation of neutron irradiation by heavy ion irradiation, and the research scope is mostly limited to the nanoscale [4,5,6], and the application of experimental results at the macro scale is very limited. Digital image correlation (DIC) of scanning electron microscope (SEM) images is a powerful technique for measuring full-field deformation at mesoscopic scale [7]. DIC is applied to investigate the mesoscale deformation of the irradiated aluminum matrix just around the borides based on scanning electron microscopy (SEM).
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