科研之友
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摘要
The microstructural evolution of an indirect-extruded ZK60 alloy by adding 1 wt.% Ce were investigated. In the extruded condition, the ZK60 alloy shows a bimodal grain structure composed of fine recrystallized grains and coarse unrecrystallized grains, whereas the ZK60-1Ce alloy exhibits a uniformly recrystallized grain structure, resulting from the promotion of dynamic recrystallization during extrusion by particle stimulated nucleation at widely distributed Mg-Zn-Ce particles. The ZK60-1Ce alloy shows a weaker basal texture and higher compressive yield strength than those of the ZK60 alloy due to the decrease in the volume fraction of unrecrystallized grains.
- 出版日期2012-12-25
