Abstract
In this study, a novel low-alloyed Mg–2Sn–2Bi-0.2Mn (wt.%) alloy is designed and extruded successfully at 523 K. Microstructural analysis reveals that a bimodal-sized grain structure is obtained due to the abnormal dynamic recrystallized (DRXed) grain growth. The results indicate that the studied alloy exhibits a good balance between strength and ductility with a tensile yield strength (TYS) of 299.7 MPa, an ultimate tensile strength (UTS) of 382.6 MPa, and an elongation (EL) of 21.2%. Besides, the underlying strengthening mechanism and ductility enhancement are analyzed and discussed in terms of bimodal-sized grain structure.
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