Physical mechanism of material microstructure evolution based upon BEMD and image multi-scale entropy during heat treatment process

摘要

The physical mechanism of material microstructure evolution is essential in developing the right properties for the designer of material forming. However, many previous investigation results have shown that the microstructure evolution only focused on using X-ray diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscope (SEM) approach, etc. There are still few experimental and computational researches pay attention to the evolution analysis of material microstructure based on microstructure image characteristics. In this paper, the physical mechanism of material microstructure evolution based on Bi-dimensional empirical mode decomposition (BEMD) and image multi-scale entropy (MSE) during heat-treatment process is proposed, using glass-ceramic material as an example. The experimental results show that the evolution process of the microstructure images can be depicted quantitatively, meanwhile, it also confirms that the complexity of image information was changed with the distribution information of grain size and glass phase composition.