Effect of secondary phase particles on postrecrystallization grain growth in reactive spray deposited 5083 Al alloys

摘要

Grain growth behavior in reactive spray deposited Al-Mg-Mn alloy 5083 and 5083 + Zr was quantitatively studied at 500, 530, and 560 deg. C. Results show that reactive spray deposited 5083 processed using N_2-5 O_2, in which no significant volume fraction of oxide particles was found, experienced significant grain growth when annealed at 500, 530, and 560 deg. C following recrystallization. On the other hand, reactive spray deposited 5083 atomized with N_2-10 O_2 and 5083 + Zr atomized with N_2-5 O_2 exhibited very slow grain growth below 530 deg. C and limited grain growth at 560 deg. C. This behavior is attributed to the retardation effect of the secondary phase particles that were formed in these alloys.