Serrated chip formation mechanism analysis for machining of titanium alloy Ti-6Al-4V based on thermal property

The chip formation mechanism in orthogonal cutting is a phenomenon that attracts the attention of many researchers. This paper investigates experimentally the orthogonal cutting of Ti6Al4V at different cutting conditions aiming at the understanding of the chip formation mechanism. Serrated chip formation is obtained during orthogonal cutting of Ti6Al4V in a wide range of cutting speeds. The results are analyzed in order to extract useful indices relevant to chip geometry, as the adiabatic zone angle and other dimensions that describe the serrated chip. The cutting forces and the acoustic emission are measured. Finally, by the aid of 3D Computed Tomography (CT) the chip morphology is analyzed to better understand the segmentation process.

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Serrated chip formation mechanism based on mixed mode of ductile fracture and adiabatic shear

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405413497941 ◽

2013 ◽

Vol 228 (2) ◽

pp. 181-190 ◽

Cited By ~ 21

Author(s):

Bing Wang ◽

Zhanqiang Liu

Keyword(s):

Ductile Fracture ◽

Formation Mechanism ◽

Chip Formation ◽

Mixed Mode ◽

Adiabatic Shear ◽

Serrated Chip ◽

Chip Formation Mechanism ◽

Serrated Chip Formation

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Modified material constitutive models for serrated chip formation simulations and experimental validation in machining of titanium alloy Ti–6Al–4V

International Journal of Machine Tools and Manufacture ◽

10.1016/j.ijmachtools.2010.08.004 ◽

2010 ◽

Vol 50 (11) ◽

pp. 943-960 ◽

Cited By ~ 251

Author(s):

Mohammad Sima ◽

Tuğrul Özel

Keyword(s):

Titanium Alloy ◽

Chip Formation ◽

Experimental Validation ◽

Constitutive Models ◽

Serrated Chip ◽

Serrated Chip Formation

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FEA Simulation of the Influence of Cutting Parameters on Serrated Chip Formation in Machining Titanium Alloy Ti-6Al-4V

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.500.152 ◽

2012 ◽

Vol 500 ◽

pp. 152-156

Author(s):

Zeng Hui Jiang ◽

Ji Lu Feng ◽

Xiao Ye Deng

Keyword(s):

Titanium Alloy ◽

Chip Formation ◽

Orthogonal Cutting ◽

Cutting Speed ◽

Cutting Parameters ◽

Element Model ◽

Serrated Chip ◽

Wide Range ◽

Serrated Chip Formation ◽

Fea Simulation

A finite element model of a two dimensional orthogonal cutting process is developed. The simulation uses standard finite software is able to solve complex thermo-mechanical problems. A thermo-visco-plastic model for the machined material and a rigid cutting tool were assumed. One of the main characteristic of titanium alloy is serrated shape for a wide range of cutting conditions. In order to understand the influence of cutting parameters on the chip formation when machining titanium alloy Ti-6Al-4V. The influence of the cutting speed,the cutting depth and the feed on the chip shape giving rise to segmented chips by strain localisation is respectively discussed.

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