Quantitative Characterization Method of Microstructure Characteristics of Dual-phase Ti-6Al-4V Alloy

doi:10.3901/JME.2021.12.217

Abstract

Abstract: How to quickly and accurately characterize the microstructure content, size, distribution and morphology of titanium alloy is the key to realize the quantitative control of its microstructure. In order to achieve this goal, the equiaxed microstructure of the titanium alloy Ti-6Al-4V is taken as the research object. Aiming at the problem that the contour of adhesive microstructure titanium alloy is irregular and difficult to be segmented, the improved fast feature point detection method combined with template circle drawing is adopted to segment the adhesive microstructure in the surface microstructure image after cutting. Furthermore, the orientation and roundness parameters are used to describe the distribution and morphology of the microstructure of titanium alloy, and the volume fraction and grain size are quantitatively characterized to describe the characteristic information of the microstructure of titanium alloy more completely. Finally, the microstructure of Ti-6Al-4V Alloy with cutting speed is studied by this method, and the feasibility and effectiveness of this method are verified. The improved fast feature point detection method combined with template circle drawing provides a new idea and method for quantitative characterization of material microstructure.

Key words: titanium alloy, segmentation of adhesive microstructure, feature point detection, quantitative characterization of microstructure

CLC Number:

TH142

XIE Feng, MA Liang, LIU Yulei, YANG Dong. Quantitative Characterization Method of Microstructure Characteristics of Dual-phase Ti-6Al-4V Alloy[J]. Journal of Mechanical Engineering, 2021, 57(12): 217-225.

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