Preparation of the gradient nanostructured layer in uranium by surface shot peening treatment
Source abstract
Abstract
The gradient nanostructured layer in uranium prepared by surface shot peening treatment has been systematically characterized. The evolution of the ultrafine grains within the surface layer of uranium was derived. The results show that the gradient microstructures from the surface to the matrix could be divided into four zones including ultrafine grains, high density deformation twins, low density deformation twins, and coarse grain matrix. The deformed microstructures in the four zones were characterized in detail. Twinning and dislocation activities were found to be the main plastic deformation mechanisms for grain refinement in uranium. Four types of twinning and dislocation slip modes were distinguished. The formation of fine equiaxed grains on uranium surface should be attributed to the combined action of the twinning, dislocation activities, and the subgrain rotation driven by mechanical-thermal coupling. The surface microhardness and the natural oxidation corrosion performance were improved in uranium prepared by shot peening treatment.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Surface Treatment and Residual Stress · Laser-Ablation Synthesis of Nanoparticles · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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