Abstract
The strengthening mechanisms of hot-extruded AZ31 magnesium alloy by {101¯2} extension twinning lamellas during multi-pass compression are investigated in present study. The numbers of {101¯2} twinning lamellas increased dramatically with the ED-TD orthogonal compression. Grain refinement induced by {101¯2} twinning lamellas greatly improved the mechanical properties of reloading along ED and TD direction. In addition, the primary {101¯2} twinning lamella can be an effective way to strengthen material via twin-twin interaction during secondary twin growing and propagating.
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