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中文摘要：
以Miedema生成热模型和Toop模型为基础,参考三元合金溶体中金属间化合物析出行为的热力学模型,计算Mg-6Zn-1Mn（质量分数,下同）三元合金体系中Mg和Zn的活度,进而求出重要强化相MgZn析出反应的Gibbs自由能变化与温度的关系,并得出其析出温度为580K。MgZn析出温度的计算结果与该合金所取均匀化处理温度相符,并得到了热分析实验的进一步验证。
英文摘要：
Based on the Miedema model and the Toop model, the activities of Mg and Zn in the Mg-6Zn-lMn alloy were calculated by a thermodynamic calculation model for predicting the precipitation behaviors of the intermetallic compounds in ternary metallic alloys. The relationship between the temperatures and the Gibbs free energy change during the precipitation reaction of the primary strengthening phase MgZn was deduced. According to the calculation, the precipitating temperature of MgZn phase is 580 K, in good agreement with the homogenizing temperature of this alloy and approved by our thermal analysis experimental results.
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