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为研究在大塑性变形过程中超细晶粒结构形成的机理 ,设计并熔铸了含微量Zr、B的Al合金Al 0 2 7wt%Zr 0 0 6 4wt%B合金 ,该合金中晶界上分布有大量的B2 Zr细小化合物颗粒 ,晶内则几乎没有B2 Zr分布。通过室温轧制及热锻后退火实验表明B2 Zr具有很高稳定性 ,而且再结晶后B2 Zr仍位于原变形后的位置 ,不随再结晶晶界的迁移而迁移 ,证明了该合金可用于大塑性变形过程中晶粒变形细化过程及再结晶和晶粒长大的研究
In order to study the formation mechanism of ultrafine grained structure in the process of plastic deformation, Al 0 2 7wt% Zr 0 0 6 4wt% B alloy containing a small amount of Zr and B was designed and cast. The grain boundary distribution There is a large amount of B2Zr fine compound particles, and there is almost no B2ZZ distribution in the crystal. The results of annealing at room temperature and hot forging show that B2Zr has high stability and the B2Zr remains in the original deformed position after recrystallization and does not migrate with the recrystallization grain boundaries. It is proved that the alloy can be used for large Study on Grain Deformation and Grain Refining and Recrystallization and Grain Growth during Plastic Deformation