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Thermal and microstructure study of the chip formation during turning of Ti64 β lamellar titanium Structure

Wagner, Vincent and Barelli, Floran and Dessein, Gilles and Laheurte, Raynald and Darnis, Phillipe and Cahuc, Olivier and Mousseigne, Michel Thermal and microstructure study of the chip formation during turning of Ti64 β lamellar titanium Structure. (2018) Journal of Manufacturing Science and Engineering, 140 (3). 1-10. ISSN 1087-1357

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Official URL: https://doi.org/10.1115/1.4038597


In recent years, many titanium alloys have emerged, each of them associated with a range of different heat treatments. Thus, several microstructures have been studied to varying degrees. For example, the Ti64 titanium alloy, mostly known for its α + β structure, can display a different state: the structure, inducing nonstandard mechanical behavior. This work presents chip formation in this specific microstructure where a strong heterogeneity is observed and where the shear band formation is a function of the relationship between the shear direction and the microstructure orientation. From these reasons, major differences are found in the chip morphology, within the same cutting condition, in comparison to the bimodal structure where a single chip morphology is obtained for each cutting condition. A section of this paper is devoted to the presentation of the β microstructure where different configurations can be seen within the same chip. Next, the influence of cutting conditions on the chip formation is studied. To highlight the specific chip formation process, a temperature model has been developed and combined with cutting force analysis to understand clearly the specificity of the chip formation for this structure. Finally, the discussion explains the different chip formation scenarios according to the workpiece microstructure to be cut.

Item Type:Article
HAL Id:hal-02134620
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Arts et Métiers ParisTech (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Institut Mines-Télécom (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > HAM France Andreas Maier (FRANCE)
Other partners > Université de Bordeaux (FRANCE)
Laboratory name:
Deposited On:20 May 2019 07:05

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