Ti5553合金伪调幅分解的高通量表征及相变动力学分析

High-throughput characterization on pseudo-spinodal decomposition and phase transition kinetics analysis of Ti5553 alloy

高通量实验方法作为现代材料学研究的一种重要手段,在相图计算、金属材料的成分—结构—性能相关性等研究方向均扮演越来越重要的角色。本研究利用一种新型的连续温度梯度热处理方法制备了具有梯度显微组织的Ti5553合金,并利用SEM和TEM等检测手段对其微观组织进行表征,确定该合金的伪调幅分解的最佳温度为(617±2)℃。基于JMA方程,推导了Ti5553合金在最佳温度的动力学方程为:f=1-exp(-1.35×t^(0.91))。

As an important tool for mapping the phase diagram and studying the composition-microstructure-property relationship of metallic materials, high-throughput experiments have aroused increasing interest of material researchers in modem materials sciences. In this study, Ti5553 sample with gradient microstructure was prepared by a method of continuous temperature gradient heat treatment, the microstructures were characterized by SEM and TEM. The results indicate that the optimum temperature of pseudo-spiondal decomposition is （617±2） ℃. The isothermal phase transformation kinetic equation ofTi5553 alloy during heat treated at 617 ℃ is：f=1-exp（-1.35×t^0.91）.