结晶学
合金
成核
位错
微观结构
叠加断层
相变
晶体孪晶
相图
作者
Yangxin Li,Dong Qiu,Y. H. Rong,Ming-Xing Zhang
标识
DOI:10.1080/14786435.2014.885141
摘要
The refined grains in both as-cast Mg-10Y-1Zn-2Zr (WZ101 K, wt.%) and Mg-10Y-1Al (WA101, wt.%) alloys have been found to have superior thermal stability after solution treatment. Plate-shaped, but different polytypes of long-period stacking ordered (LPSO) phases distributed along grain boundaries are considered as the predominant inhibitors of grain growth. Based on the plate-shaped features of the LPSO phases, a modified Zener’s model is established and the predicted limiting grain sizes are in a good agreement with the experimental results. Therefore, this model has strong potential for designing advanced Mg-RE-based alloys with high strength and high creep resistance at high temperatures.
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