A study of regularly spaced shear bands and morphology of serrated chip formation in microcutting process

2010 ◽  
Vol 63 (2) ◽  
pp. 227-230 ◽  
Author(s):  
H. Wang ◽  
S. To ◽  
C.Y. Chan ◽  
C.F. Cheung ◽  
W.B. Lee
Keyword(s):  
Chip Formation ◽  
Shear Bands ◽  
Serrated Chip ◽  
Serrated Chip Formation

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

2013 ◽  
Vol 421 ◽  
pp. 193-200 ◽  
Author(s):  
Tao Cui ◽  
Hong Wei Zhao ◽  
Chuang Liu ◽  
Ye Tian
Keyword(s):  
Grain Size ◽  
Dynamic Recrystallization ◽  
Microstructure Evolution ◽  
Chip Formation ◽  
High Speed ◽  
Shear Bands ◽  
Cutting Temperature ◽  
Serrated Chip ◽  
High Speed Cutting ◽  
Serrated Chip Formation

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.

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