Evolution of contact lengths during the turning of treated Ti64 β

Evolution of contact lengths during the turning of treated Ti64 β

WAGNER Vincent, DESSEIN Gilles

download PDF

Abstract. One of the main ways to increase productivity during the machining of titanium alloy parts is to control the wear mechanisms and consequently the life of the cutting tools. The state-of-the-art shows wear phenomena generated mainly by diffusion. The latter is due to the intrinsic physical properties of titanium generating high temperatures on the cutting and relief faces. Concerning the secondary cutting zone, the wear phenomena result from thermomechanical actions induced by the contact between the secondary zone of the chip and the cutting face of the tool. The analysis of the contact lengths, divided into two parts (sliding contact and sticking contact), is then a strong indicator to be privileged in order to allow the understanding of the present mechanisms. This analysis is even more important when machining processed Ti64  in which chip formation is no longer periodic but a function of the angle between the primary shear band and the orientation of the individual colonies comprising the titanium. The purpose of this article is the analysis of the contact lengths during the machining of Ti64 treated  . After having presented the experimental device allowing visualising the evolution of the contact length between the chip and the cutting face, a statistical analysis based on the collected images makes it possible to put forward the differences of sliding behaviour on the cutting face. It appears that the distribution of the collected values allows explaining and extrapolating the wear appearing on the cutting face.

Contact Length, Ti64β, Tool Wear

Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: WAGNER Vincent, DESSEIN Gilles, Evolution of contact lengths during the turning of treated Ti64 β, Materials Research Proceedings, Vol. 28, pp 1347-1356, 2023

DOI: https://doi.org/10.21741/9781644902479-146

The article was published as article 146 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

[1] V. Wagner, E. Duc, Study of Ti-1023 milling with toroidal tool, Int. J. Adv. Manuf. Technol. 75 (2014) 1473-1491. https://doi.org/10.1007/s00170-014-6217-5
[2] V. Wagner, M. Baili, G. Dessein, The relationship between the cutting speed, tool wear, and chip formation during Ti-5553 dry cutting, Int. J. Adv. Manuf. Technol. 76 (2015) 893-912. https://doi.org/10.1007/s00170-014-6326-1
[3] E.H. Lee, W. Shaffer; The theory of plasticity applied to the problem of machining, J. Appl. Mech. T ASME 18 (1951) 405-413.
[4] N.G. Abuladze. Character and the length of tool-chip contact (in Russian), in: Proceedings of the machinability of heat-resistant and titanium alloys, Kuibyshev, 1962, pp. 68-78.
[5] H.T. Zhang, P.D. Liu, R.S. Hu, A three zone model and solution of shear angle in orthogonal machining, Wear 143 (1991) 29-43. https://doi.org/10.1016/0043-1648(91)90083-7
[6] P.L.B. Oxley, Mechanics of machining: an analytical approach to assessing machinability, Chichester: Ellis Horwood Limited, 1989.
[7] A. Moufki, A. Molinari, D. Dudzinski, Modelling of orthogonal cutting with a temperature dependent friction law, J. Mech. Phys. Solid. 46 (1998) 2103-2138. https://doi.org/10.1016/S0022-5096(98)00032-5
[8] N.N. Zorev, Metal cutting mechanics, Oxford: Pergamon Press, 1966.
[9] F. Barelli, V. Wagner, R. Laheurte, G. Dessein, P. Darnis, O. Cahuc, M. Mousseigne, Orthogonal cutting of TA6V alloys with chamfered tools: Analysis of tool-chip contact lengths, Proceedings of the Institution of Mechanical Engineers, Part B: J. Eng. Fabric. 231 (2017) 2384-2395.
[10] V. Wagner, F. Barelli, R. Laheurte, G. Dessein, P. Darnis, O. Cahuc, M. Mousseigne, Thermal and Microstructure Study of the Chip Formation During Turning of Ti64 β Lamellar Titanium Structure, J. Manuf. Sci. Eng. 140 (2018) 031010. http://doi.org/10.1115/1.4038597
[11] R. Komanduri, B.F Von Turkovicz, New Observations on the Mechanism of Chip Formation When Machining Titanium Alloys, Wear 69 (1981) 179-188. https://doi.org/10.1016/0043-1648(81)90242-8