Grain Breakup During Elevated Temperature Deformation of an HCP Metal

摘要: A combination of mechanical testing, EBSD and crystal plasticity finite element modeling were used to investigate the influence temperature on fragmentation grains in a zirconium alloy. The results demonstrate that Zircaloy-4 fragment more as rises. This trend can be explained by an increasing difference between CRSS values for 〈c+a〉 slip 〈a〉 change relative activities with is supported experimental observations macroscopic anisotropy in-grain misorientation axes calculated from data, well modeling. By tracking microstructural evolution during deformation, it shown two major texture components different degrees under action prismatic slip. Grains $$ \left\langle {11\overline{2} 0} \right\rangle $$ fiber are significantly stable than those {10\overline{1} fiber, which break up. latter heterogeneously portions grain rotate opposite directions, some do not at all.