THERMODYNAMIC ANALYSIS OF THE PRECIPITATION BEHAVIORS OF Al-M(M=Sr, Nd) PHASES IN Mg-Al-M ALLOYS
THERMODYNAMIC ANALYSIS OF THE PRECIPITATION BEHAVIORS OF Al-M(M=Sr, Nd) PHASES IN Mg-Al-M ALLOYS
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DOI：
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发表时间：
2006
影响因子：
2.3
通讯作者：
Z. Tie-yong
中科院分区：
文献类型：
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作者：
Z. Tie-yong
基于Al-M（M=Sr，Nd）二元相图、Miedema模型和Toop模型，推导了Mg-Al-M系中Al-M金属间化合物析出行为的热力学计算模型。计算的Mg-8Al-3.5Sr三元系中Al-Sr化合物的析出温度与文献值吻合较好。计算了Mg-9/6Al-M（M=Sr，Nd）中使Al-M化合物优先于α-Mg析出的最低M含量，讨论了Al-M化合物的析出行为及其对镁合金力学性能的影响。提出了复合添加Nd和Sr制备高强度耐热镁合金的方法。
Based on the binary phase diagrams of Al-M(M=Sr, Nd), Miedema model and Toop model, the thermodynamic calculation model for predicting the precipitation behaviors of the Al-M intermetallic compounds in Mg-Al-M system was deduced. The calculated precipitating temperature of Al-Sr compound in Mg-8Al-3.5Sr ternary system is in good agreement with the references. The lowest contents of M in the Mg-9/6Al-M(M=Sr, Nd), making the Al-M compounds precipitate prior to α-Mg, were calculated, the precipitation behaviors of the Al-M compounds and their effects to the mechanical properties of Mg alloys were discussed. Composite addition of Nd and Sr to prepare the heat resistance of Mg alloys with higher strength was proposed.