Improving the mechanical properties of a hot-extruded AZ31 alloy by {10(1)over-bar2} twinning lamella

摘要

The strengthening mechanisms of hot-extruded AZ31 magnesium alloy by {10 (1) over bar2} extension twinning lamellas during multi-pass compression are investigated in present study. The numbers of {10 (1) over bar2} twinning lamellas increased dramatically with the ED-TD orthogonal compression. Grain refinement induced by {1012} twinning lamellas greatly improved the mechanical properties of reloading along ED and TD direction. In addition, the primary {10 (1) over bar2} twinning lamella can be an effective way to strengthen material via twin-twin interaction during secondary twin growing and propagating. (C) 2016 Elsevier B.V. All rights reserved.