An Mg‐Al‐Zn Alloy with Verry High Specific Strength and Superior High‐strain‐rate Superplasticity Processed by Reciprocating Extrusion

A novel method called “Reciprocating Extrusion” is exploited to realize the high potential of Mg‐15Al‐1Zn alloy to exhibit superior mechanical properties and superplasticity, bypassing the costly and complicated RS+PM route. Such refined alloys exhibit unique high‐strain‐rate superplasticity at 325 °C and maximum elongation larger than 1610% at 1×10–2 s–1. They also possess greater strength/density than 7075‐T736 Al alloys.