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Dislocation theories can interpret this trend considering the relationship between imposed
strain rate and rate of dislocation generation obtained from the Orowan equation [30].
From this relation, it can be concluded that the rate of dislocation density generation is increased
with increasing the resolved shear strain. Since the cell size is proportional to inverse
squared root of dislocation density [8, 31], it seems that deformation can refine the structure
in a uniform manner. However, the second type of dislocation reactions during deformation that is called dynamic recovery prohibits the steady rate of grain refinement. The main role
of dynamic recovery is dislocation annihilation and since the rate of dynamic recovery is
proportional to the material dislocation density, the rate of dynamic recovery is increased
through straining and causes to decrease the rate of grain refinement at large strains
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سوال اینه :
1 - Orowan equation چه رابطه ایه ؟
به چه مرجعی باید برای مطالعی کاملش مراجعه کرد ؟
2 - dynamic recovery دقیقا چه تعریفی داره ؟
در چه شرایطی اجاد میشه ؟
چه تاثیری بر مقاومت و استحکام داره ؟
چه مرجعی برای مطالعه وجود داره ؟
3 - dynamic recovery is dislocation annihilation and since the rate of dynamic recovery is
proportional to the material dislocation density
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