Numerical contribution to the comprehension of saw-toothed Ti6Al4V chip formation in orthogonal cutting

Ducobu, François; Rivière-Lorphèvre, Édouard; Filippi, Enrico

doi:10.1016/j.ijmecsci.2014.02.017

Cited by 103 publications

(54 citation statements)

References 29 publications

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“…To analyze the chip segmentation phenomenon, many parameters are defined in the literature, such as the chip segmentation frequency (Hz) and the segmentation intensity [47,48] . However, these latter are not able to ensure comparison with other tests under different machining conditions.…”

Section: Chips Morphologymentioning

confidence: 99%

Numerical and experimental investigations of Ti-6Al-4V chip generation and thermo-mechanical couplings in orthogonal cutting

Harzallah

Pottier

Senatore

et al. 2017

International Journal of Mechanical Sciences

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a b s t r a c tThe chip formation mechanism of the Ti-6Al-4V remains a challenging problem in the machining process as well as its modeling and simulation. Starting from experimental observation on the titanium alloys Ti-6Al-4V machining shows that the ductile fracture in the chip formation is dominated by the shear phenomenon under high strain rate and temperature, the present work develops a new coupled behavior and damage model for better representation and understanding of the chip formation process. The behavior and damage of Ti-6Al-4V have been studied via hat-shaped specimen under temperature up to 900 °C and strain rate up to 1000 s − 1 . An inverse identification method based on Finite Element (FE) is established in order to determine the constitutive law's parameters. The prediction of the segmented chip was analyzed through 3D finite element orthogonal cutting model which was validated by an in-situ and post-mortem orthogonal cutting machining observations. Finally, a particular attention is focused on the chip formation genesis which is described by three steps: Growth, Germination and Extraction.

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Section: Chips Morphologymentioning

confidence: 99%

Numerical and experimental investigations of Ti-6Al-4V chip generation and thermo-mechanical couplings in orthogonal cutting

Harzallah

Pottier

Senatore

et al. 2017

International Journal of Mechanical Sciences

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“…To cut with this problem, many investigations have been done in the purpose to highlight the major role of appropriate material coefficients choice in numerical model reliability increase [9,23,24]. On the other hand, it is important to note that the JC model appears unable to reproduce alone chip formation and segmentation [25,26] due to the fact that its expression exhibits a continuous increase of the flow stress-strain curve for whatever the strain and the temperature levels which does not represent the real workpiece material behavior. Hence, additionally to plastic model implementation, failure needs to be also defined especially when using the Lagrangian-based analysis.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of constitutive coefficients effects on FE simulation of the 2D orthogonal cutting process: application to the Ti6Al4V

Yaich

Ayed

Bouaziz

et al. 2016

Int J Adv Manuf Technol

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International audienceIn this paper, a deep study of constitutive parameters definition effect is done in order to guarantee sufficient reliability of the finite element machining modeling. The case of a particular biphasic titanium alloy Ti6Al4V known by its low machinability is investigated. The Johnson-Cook (JC) elasto-thermo-visco-plastic-damage model combined with the energy-based ductile fracture criteria is used. Segmentation frequency, chip curvature radius, shear band spacing, chip serration sensitivity and intensity, accumulated plastic strain in the formed chip segments, and cutting forces levels are determined where their dependency to every constitutive coefficient is examined and highlighted. It is demonstrated from the separate variation of every plastic and damage parameters that an interesting finite element modeling (FEM) relevance is reached with the adjustment of JC strain hardening coefficients term, thermal softening parameter, exponent fracture factor, and damage evolution energy. Moderate and high cutting speeds are applied to the cutting tool in the aim to test their impact on shear localization, chip segmentation, and numerical forces levels as well as to approve previous highlighted findings related to constitutive parameters definition. In general, this study focuses on a prominent decrease in identification process cost with the previous knowledge of the most affecting constitutive coefficients while keeping an interesting agreement between numerical and experimental results

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“…Arbitrary Lagrangian-Eulerian (ALE) formulations [3]. Both conventional and high speed machining experiments were carried out on Ti-6Al-4V alloy to investigate the machinability and tool wear by evaluating the cutting forces and chip morphology.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of micro-textured tools on machining of Ti–6Al–4V alloy: An experimental and numerical approach

Arulkirubakaran

Senthilkumar

Kumawat

2016

International Journal of Refractory Metals and Hard Materials

161

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Numerical contribution to the comprehension of saw-toothed Ti6Al4V chip formation in orthogonal cutting

Cited by 103 publications

References 29 publications

Numerical and experimental investigations of Ti-6Al-4V chip generation and thermo-mechanical couplings in orthogonal cutting

Numerical and experimental investigations of Ti-6Al-4V chip generation and thermo-mechanical couplings in orthogonal cutting

Numerical analysis of constitutive coefficients effects on FE simulation of the 2D orthogonal cutting process: application to the Ti6Al4V

Effect of micro-textured tools on machining of Ti–6Al–4V alloy: An experimental and numerical approach

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