Abstract
Abstract To refine the grains of reduced activation ferritic/martensitic steel, the closed dual equal channel angular pressing deformation is used. The effects of the deformation on the microstructure, precipitation phase, and mechanical properties of reduced activation ferritic/martensitic steel are studied. The results show that the closed dual equal channel angular pressing deformation can refine the grains of reduced activation ferritic/martensitic steel. The grain size of the deformed reduced activation ferritic/martensitic steel decreases gradually with increasing deformation pass. After four deformation passes, the grain sizes in the elongation deformation zone and shear deformation zone are refined to 0.68 μm and 0.71 μm, respectively. With increasing deformation pass, the hardness and yield strength increase. After four deformation passes, the yield strengths in the elongation deformation zone and shear deformation zone increase to 1,093.3 MPa and 1,021.1 MPa, respectively.
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