论文部分内容阅读
Ti-5.3Al-4.2Sn-2Zr-1Mo-0.25Si-1Nd钛合金(简称Ti-55合金)是我国自行研制,工作温度为550℃的高温耐热钛合金.使用Ti-55合金对飞机发动机设计,飞行性能的提高具有重大意义.在Ti-55合金中,稀土元素Nd形成弥散分布、稳定性高的稀土相颗粒,显著提高合金性能.近几年来,对稀土相在Ti-55合金中形貌特征,及稀土相对Ti-55合金力学性能影响等均进行过研究,但对稀土相析出的本质尚缺乏了解.本文利用Miedema理论模型,计算合金混合热,获得了与实验一致的结果.
Ti-5.3Al-4.2Sn-2Zr-1Mo-0.25Si-1Nd titanium alloy (referred to as Ti-55 alloy) is our own research and development, the working temperature is 550 ℃ high temperature heat-resistant titanium alloy. Ti-55 alloy for aircraft engines Design and flight performance is of great significance.In the Ti-55 alloy, the rare earth element Nd forms a dispersed and highly stable rare earth phase particles, significantly improving the performance of the alloy.In recent years, the rare earth phase in the Ti-55 alloy Morphology and characteristics of rare earth relative to the mechanical properties of Ti-55 alloy were studied, but the nature of rare earth precipitation is still lack of understanding.In this paper, the use of Miedema theoretical model to calculate the alloy heat of mixing obtained with the experimental results.