Quantitative Analysis of Metallographic Organization of TC4 Titanium Alloy Based on Digital Image Processing

To investigation the microstructure of TC4 titanium alloy, this paper presents an approach of digital image processing that can realize the quantitative analysis of the microstructure of TC4 titanium alloy. By the software ImageJ, the digital image processing techniques such as image enhancement, thresholding as well as image segmentation were employed to calculate the proportion of the α-phase and other characteristic parameters in the microstructure images of various heat treatment of Titanium alloy. The results show it is a feasible method to obtain the microstructural characterization of TC4 rod forging in which the percentage of α-phase is 49.38% and ratio of long axis and short axis is 1.458.