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The influence of laser assistance on the machinability of the titanium alloy Ti555-3

Article dans une revue avec comité de lecture
Author
BRAHAM-BOUCHNAK, Tarek
ccGERMAIN, Guénaël
206863 Laboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]
MOREL, Anne
LEBRUN, Jean-Lou

URI
http://hdl.handle.net/10985/8609
DOI
10.1007/s00170-013-4855-7
Date
2013
Journal
International Journal of Advanced Manufacturing Technology

Abstract

The Ti533-3 alloy is a new titanium alloy which is starting to see increased use in the aeronautical domain to improve the durability of components and to optimize the weight/resistance ratio. This alloy is characterized by greater resistance compared to the more commonly used titanium alloys such as Ti6Al4V. However, a disadvantage of the Ti533-3 alloy is that it is very difficult to machine. In this work, the use of laser-assisted machining has been tested to improve chip formation by a thermal softening phenomenon and to improve the machining productivity of the alloy. A parametric investigation of laser assistance on the machinability of the Ti555-3 titanium alloy shows that: (1) the cutting forces can be greatly decreased if the surface temperature is high; (2) the thermal gradient induced by laser heating modifies the surface integrity in terms of strain hardening and residual stresses in the workpiece; and (3) the chip formation mechanisms are also changed, by increasing the sawteeth frequency when using laser assistance

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