A New Behavior Model for Better Understanding of Titanium alloys Ti-6Al-4V Chip Formation in Orthogonal Cutting

Mahmoud Harzallah (1) , Thomas Pottier (1) , Johanna Senatore (1) , Michel Mousseigne (1) , G. Germain (2) , Yann Landon (1)

1 ICA - Institut Clément Ader
2 Arts et Métiers ParisTech

The behavior of Ti-6Al-4V has been studied via shear tests, using hat shaped specimen, on a servo-hydraulic Gleeble 3800 testing machine under the strain rate up to 10(3)s(-1) and temperature up to 900 degrees C. A new thermo-visco-plastic material law is proposed, based on a modified Johnson-Cook formulation. An inverse identification method based on Finite Element (FE) is established and detailed in order to determine the constitutive law's parameters. The new model is implemented in a 3D finite element model to study the chip formation in orthogonal cutting configuration. The numerical simulations were performed on FE software Impetus Afea (R) able to solve dynamic non-linear problem.

Mots clés: Chip formation; Ti-6Al-4V alloy; Inverse identification; Thermo-visco-plastic model; Hat-shaped specimen; Orthogonal cutting

Domaines: Sciences de l'ingénieur [physics]

Mahmoud Harzallah, Thomas Pottier, Johanna Senatore, Michel Mousseigne, G. Germain, et al.. A New Behavior Model for Better Understanding of Titanium alloys Ti-6Al-4V Chip Formation in Orthogonal Cutting. ESAFORM 2016 - 19th International ESAFORM Conference on Material Forming, Apr 2016, Nantes, France. art. 080015 - 6 p., ⟨10.1063/1.4963490⟩. ⟨hal-01609103⟩