Microstructure Evolution of Ti-6Al-4V Alloy during High Speed Cutting: An Investigation Using Finite Element Simulation

Abstract:

In this paper, a novel model combining the microstructure prediction model and a modified constitutive model of the Johnson-Cook (JC) model was developed and embedded into FEM software via the user subroutine. The chip formation and microstructure evolution in high speed cutting of Ti-6Al-4V alloy were simulated based on the presented model. The results indicated that dynamic recrystallization mainly happened in ASBs, where the grain size had a big decline. According to the variation of cutting temperature and grain size of microstructure, the mechanism of the adiabatic shear bands (ASBs) formation was investigated deeply and concluded that dynamic recrystallization was the root cause of the serrated chip formation.

• Periodical: Applied Mechanics and Materials (Volume 421)
• Pages: 193-200
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.421.193
• Online since: September 2013
• Authors: Tao Cui, Hong Wei Zhao, Chuang Liu, Ye Tian
• Keywords: Dynamic Recrystallization (DRX), Finite Element Method (FEM), Microstructure Evolution, Serrated Chip, Ti-6Al-4V Alloy

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