Dynamic recrystallization ( DRX ) takes place during the deformation process, and the average dynamically recrystallized grain size ( d_ ( rec )) changes with deformation variables. The natural logarithm of d_ ( rec ) is linear with the natural logarithm of Zener-Hollomon ( Z ) parameter. 变形过程中发生了动态再结晶且晶粒平均尺寸随变形参数的不同而改变,其自然对数与ZenerHollomon(Z)参数的自然对数成线性关系;