Although there were a large number of experimental researches on the primary crystallization of amorphous materials,it was difficult to track and observe the primary crystallization process in real time due to the limitations of experimental conditions.The phase field method was widely used due to the fully consideration of the local diffusion properties of the amorphous precursor with the variation of the composition during the transformation and the reflection of the microstructure evolution process in a crystallization process in real time.The phase field method was employed to simulate the influence of temperature on the microstructure evolution and growth kinetics of amorphous alloys during the primary crystallization process.The results show that under different temperature conditions,the combined growth occurs during the later stage of primary crystallization process of the amorphous alloy.As the evolution time increases,the number of grains gradually decreases,and the grain size gradually increases.The crystallization fraction increases with the increase of evolution time and temperature.The higher the temperature,the higher the crystallization fraction within the same evolution time.The gro wt h index corresponding to different temperatures are less than 1,indicating that the mode of crystallization method is primary crystallization.The temperature has no significant effect on the mode of crystallization.
关键词
一次晶化/相场方法/微观组织演化/生长动力学/温度
Key words
primary crystallization/phase field method/microstructure evolution/growth kinetics/temperature
维普
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