含Er高Nb-TiAl基合金热力学模型的计算机数值模拟

Numerical Simulation of High Er Nb-TiAl Alloy Thermodynamics Model

以含Er高Nb-Ti Al基合金为对象,采用计算机数值模拟的方法,建立Miedema混合焓的热力学模型,计算各组元的生成热。同时,在扫描电镜下对铸态合金的微观组织进行观察。结果表明,适当的加入Er元素,不仅可以降低熔炼过程中基体的氧元素含量,同时还具有良好的析出强化效果。

The thermodynamics model of high Er Nb-TiAl alloy was established by numerical simulation,and the microstructure of the casting alloy was observed by SEM.The results show that the oxygen content of the matrix is reduced during melting after addition of Er elements.At the same time,the alloy shows good precipitation strengthening effect.