爆炸加载下金属塑性变形及超细晶形成机制  

The Formation Mechanism of Ultrafine Grain in Pure Iron Under Explosive Shock Loading

作　　者：杨卓越[1] 李保成[1] 赵家萍[1] 

机构地区：[1]华北工学院材料科学与工程系,山西太原030051

出　　处：《材料热处理学报》2001年第4期56-59,共4页Transactions of Materials and Heat Treatment

摘　　要：研究了工业纯铁爆炸成形弹丸内微观组织变化 ,结果表明 :由于绝热温升和特有的塑性变形机制 ,弹丸在成形过程中内部组织发生动态回复和动态再结晶 ,动态回复形成亚晶 ,因变形量不均匀使亚晶粒直径分布在 0 3～ 1 5 μm之间 ,动态再结晶使弹丸内形成均匀的小于 5 μm的超细晶粒。The microstructure in explosively formed projectiles (EFP) has been investigated, The results showed that, due to adiabatic temperature rise and special plastic deformation mechanism, dynamic recovery and dynamic recrystallization have occurred in explosively formed projectiles (EFP). Submicron grains with a size of 0 3～1 5μm have been formed by dynamic recovery, while uniform ultrafine grains with a size less than 5μm have been formed by dynamic recrystallization.

关 键 词：爆炸成形弹丸 超细晶 亚晶 动态回复 动态再结晶 

分 类 号：TG111.7[金属学及工艺—物理冶金] TG392[金属学及工艺—金属学]