アルミニウム合金の温間圧延における組織変化

Abstract

Micro-structural change in 1100, 3004, 5052 and 5082 aliminum alloys due to single pass rolling at temperature betwean 50°C and 350°C has been investigated. Dynamic recovery during rolling was influenced by both rolling temperature and Mg content. In the alloys containing Mg, finer subgrain size and existence of dislocations in subgrains were found, though no subgrain formation were observed in 5052 and 5082 alloys at lower rolling temperature, due to inhibited migration of dislocations. After rolling, hardness decreased due to the static recovery, while recrystallization occured at elevated temperature. In the alloys containing Mg, the recrystallization was accelerated by high density of dislocations which were introduced during rolling.