论文部分内容阅读
利用三元微观相场动力学模型耦合弹性微观理论,模拟了973 K下,弹性应变能对Ni75Al14Mo11合金早期沉淀过程的影响。对该合金微观组织演化图、L10相体积分数、序参数及占位几率进行了分析。结果表明,该合金首先析出L10结构相(L10(Ⅰ)/L10(Ⅱ))。随着弹性应变能增加,2种L10结构相的析出受到影响,弹性应变能明显抑制L10(Ⅰ)的析出。随着时效的进行,2种L10结构相最终转变为大量的L12结构沉淀相。
The effect of elastic strain energy on the precipitation process of Ni75Al14Mo11 alloy at 973 K was simulated by using the coupled three-dimensional micro-phase field dynamics model and the elastic microscopic theory. The evolution of the microstructure of the alloy, L10 phase volume fraction, order parameters and the probability of placeholder were analyzed. The results show that the L10 phase (L10 (Ⅰ) / L10 (Ⅱ)) precipitates firstly. As the elastic strain energy increases, the precipitation of the two L10 phases is affected, and the elastic strain can significantly inhibit the precipitation of L10 (Ⅰ). As the aging progresses, the two L10 phases finally transform into a large number of L12 precipitates.