Abstract
To improve the intensity of Zr alloy sheets, the structural evolution and mechanical properties of 47Zr–45Ti–5Al–3V alloys treated with incremental shear deformation were investigated by X-ray diffraction, microhardness tester, nanoindentation, and uniaxial tensile testing. Results indicate that the strengthening effect of incremental shear deformation is significant. The hardness and friction coefficient of sheet specimens increase with increased deformation degree, but considerable deformation reduces their ductility and produces internal microcracks. Strengthening effect is caused not only by cold deformation strengthening, which leads to increased dislocation density, but also by shear deformation, which can transform the α and β phases in the sheet into a high-intensity ω phase (i.e., dispersion-strengthening effect). In the process of shear deformation, β phase transformation is more preferable because of its softness compared with α phase.
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