Abstract
After classified by micro- and macro-structures, the parts of the sheet ingots obtained from experiments mentioned in the previous reports was examined on the correlation between the reduction and structures.
The findings are as follows:
(1) Through compression test, it is recognized that the behaviour of the sheet ingot at the time when the reduction is given is related to its micro-structure but not to its macro-structure.
(2) Through examination and statistical study of the relation between grain size in cast structure and recrystallized grain size under the different reduction rates and annealing temperatures, it is recognized that the ingot which has fine micro-structure is rolled into the sheet which has fine grain size.
