γMn-Cu合金在(γ+α)亚稳互溶区时效过程Spinodal分解的热力学判据
Thermodynamic criterion of Spinodal decomposition aging in the （γ＋α） metastable miscibility gap in γMn-Cu alloys
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摘要: 根据亚规则溶液模型，进行锰铜二元系的热力学计算表明，γMn-Cu合金在(γ+α)亚稳互溶区确实存在Spinodal分解，在400～600 ℃时效发生Spinodal分解的是浓度范围为60～90at% Mn的合金。与硬度法相比，采用测量尼尔点来确定Spinodal分解的区域较为可靠。Abstract: Sub-regular solution model is used to calculate the thermodynamic of γMn-Cu alloy. It is revealed that there exists Spinodal decomposition in (γ+α) metastable miscibility gap. For the Mn-Cu alloy with composition of 60~90 at% Mn Spinodal decomposition will occurs during aging at 400~600 ℃. The Spinodal decomposition range measured by TN point is more reliable than by hardness.
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