Material behaviour at low temperatures for calibrating cryogenic machining numerical simulations

Rachele Bertolini , Stefania Bruschi , Andrea Ghiotti , Grégory Haugou (1) , Hervé Morvan (1) , Laurent Dubar (1)

1 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201

Recently, cryogenic machining of difficult-to-cut alloys has been adopted to increase tool life and improve the machined components surface integrity. Numerical models of cryogenic machining are being developed to evaluate the influence of the different process parameters. Up to now, their calibration in terms of material flow stress is fulfilled using data at conventional temperatures, whereas the material sensitivity to temperatures lower than the environment one should be taken into account. To this regard, the paper objective is to present material data, obtained through a newly developed Split Hopkinson Tension Bar, at cryogenic temperatures and high strain rates to properly calibrate cryogenic machining numerical models

Mots clés: Cryogenic machining; Stress; Titanium

Domaines: Sciences de l'ingénieur [physics]; Mécanique [physics.med-ph]

Rachele Bertolini, Stefania Bruschi, Andrea Ghiotti, Grégory Haugou, Hervé Morvan, et al.. Material behaviour at low temperatures for calibrating cryogenic machining numerical simulations. 17th CIRP Conference on Modelling of Machining Operations, CIRP CMMO, Jun 2019, Sheffield, United Kingdom. pp.344-349, ⟨10.1016/j.procir.2019.04.160⟩. ⟨hal-03679854⟩