Improvement of superplasticity in AA5083 by equal channel angular extrusion and rolling

被引：10
作者：
Jin, H. [1 ]
机构：
[1] Nat Resources Canada, CanmetMAT, Hamilton, ON L8P 0A5, Canada
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 14期
关键词：
Aluminium alloy; superplasticity; equal channel angular extrusion; rolling; AL-MG ALLOY; ALUMINUM-ALLOY; GRAIN-REFINEMENT; CAVITY GROWTH; RECRYSTALLIZATION; DEFORMATION; PLASTICITY; BEHAVIOR; FINE;
D O I：
10.1080/02670836.2017.1317954
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-Mg-Mn alloy AA5083 has been processed by equal channel angular extrusion (ECAE) followed by hot and cold rolling. The grain structure, crystallographic texture, intermetallic phases and superplasticity were investigated and compared with a conventionally hot and cold rolled AA5083 sheet. The intensive shear strain in ECAE has a very strong breakdown effect on the dendritic cast structure, which effectively changes the volume fraction and size of the intermetallic particles that provide particle stimulated nucleation upon recrystallisation. Consequently, the combination of ECAE and rolling leads to a finer and more thermally stable grain structure, with fewer very coarse constituent particles, resulting in a significant improvement in superplasticity through enhanced grain boundary sliding, with retarded formation and linkage of cavities.
引用
收藏
页码：1696 / 1702
页数：7
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