1. Microstructure and mechanical properties of extruded Mg96Zn1Y3 alloy.
- Author
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Li, R.G., Zhang, H.J., and Fu, G.Y.
- Subjects
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MICROSTRUCTURE , *MAGNESIUM alloys , *MECHANICAL properties of metals , *RECRYSTALLIZATION (Metallurgy) , *GRAIN size , *STRENGTH of materials - Abstract
Microstructure and mechanical properties of an extruded Mg 96 Zn 1 Y 3 alloy have been investigated in the current study. Microstructure of as extruded alloy consists of α-Mg, long period stacking ordered (LPSO) phase and parallelepiped Y-riched phases, which exhibits a bimodal distribution of fine recrystallized and coarse elongated grains. Fine recrystallized grains with an average grain size of 1.5 μm are mainly pinned by bulk LPSO-14H phase, inside which both LPSO-18R phase and LPSO-14H phase coexist. The extruded Mg 96 Zn 1 Y 3 alloy exhibits a good combination of yield strength and elongation below 200 °C, which is mainly attributed to LPSO phases, stronger texture and finer DRX grains. The main deformation is controlled by load transfer mechanism below 250 °C, and deformation is controlled by non-basal dislocation movement between 300 °C and 325 °C. A good plasticity is attained at 350 °C with an elongation of 140%. The flow stress behavior at 350 °C is mainly controlled by non-basal slip accompanying with dynamic recrystallization and growth of grain. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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