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Modelling of Micro-Machining of Ti-6Al-4V: Strain Gradient Interpretation


Affiliations
1 Indian Institute of Technology Kharagpur, Kharagpur, India., India
     

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Advances in computer methods over the last two decades have accelerated research in engineering sectors because of high computing power. Micro-machining is a manufacturing domain that is widely utilized for producing miniature components where predictability is a concern. The current work emphasized developing and executing a user-defined constitutive flow and friction models to simulate the physical phenomenon of chip morphology, residual stresses, and cutting forces during orthogonal machining at the micro-scale. The proposed model integrates strain gradient and dynamic recrystallization effect using a user hardening subroutine written in Fortran for machining of Ti-6Al-4V in micron scale. Furthermore, a user defined friction subroutine was implemented at the tool-chip interaction. A comparison is made between the modelling results and experiments in terms of specific cutting energy (SCE) and residual stresses.

Keywords

Micro-Cutting, Residual Stress, Chip Morphology, Ti-6Al-4V.
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  • Modelling of Micro-Machining of Ti-6Al-4V: Strain Gradient Interpretation

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Authors

Rahul Yadav
Indian Institute of Technology Kharagpur, Kharagpur, India., India
Gautam Kumar
Indian Institute of Technology Kharagpur, Kharagpur, India., India
Nilanjan Das Chakladar
Indian Institute of Technology Kharagpur, Kharagpur, India., India
Soumitra Paul
Indian Institute of Technology Kharagpur, Kharagpur, India., India

Abstract


Advances in computer methods over the last two decades have accelerated research in engineering sectors because of high computing power. Micro-machining is a manufacturing domain that is widely utilized for producing miniature components where predictability is a concern. The current work emphasized developing and executing a user-defined constitutive flow and friction models to simulate the physical phenomenon of chip morphology, residual stresses, and cutting forces during orthogonal machining at the micro-scale. The proposed model integrates strain gradient and dynamic recrystallization effect using a user hardening subroutine written in Fortran for machining of Ti-6Al-4V in micron scale. Furthermore, a user defined friction subroutine was implemented at the tool-chip interaction. A comparison is made between the modelling results and experiments in terms of specific cutting energy (SCE) and residual stresses.

Keywords


Micro-Cutting, Residual Stress, Chip Morphology, Ti-6Al-4V.

References