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Metals 2015, 5(3), 1148-1162;

Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Institut Clement Ader, Universite Toulouse 3-Paul Sabatier, 3 rue Caroline Aigle, F-31400 Toulouse, France
Institut Superieur de l'Aeronautique et de l'Espace, 10 avenue Edouard-Belin, 31055 Toulouse Cedex 4, France
Intitut de Recherche Technologique, 4 rue Augustin Fresnel, 57070 Metz, France
Author to whom correspondence should be addressed.
Academic Editor: Mark T. Whittaker
Received: 11 February 2015 / Revised: 8 June 2015 / Accepted: 23 June 2015 / Published: 30 June 2015
(This article belongs to the Special Issue Titanium Alloys)
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The present article focuses on the influence of machining on the fatigue life of a titanium alloy: Ti6Al4V. An experimental design was adopted in order to highlight the effects of machining parameters on surface integrity while generating very different surfaces with a view to subsequent fatigue testing (four point bending tests). Firstly, the impact of machining parameters on surface integrity was demonstrated. Then, the influence of surface integrity on fatigue lifetime was observed: no influence of the geometric and metallurgical parameters was observed. However, the mechanical parameter (e.g., residual stress) seemed to have a preponderant influence. To conclude, a machining plan of procedure was proposed to significantly improve the fatigue lifetime as compared with a reference industrial plan of procedure. View Full-Text
Keywords: machining; residual stress; surface integrity; fatigue life; titanium alloys machining; residual stress; surface integrity; fatigue life; titanium alloys

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Moussaoui, K.; Mousseigne, M.; Senatore, J.; Chieragatti, R.; Lamesle, P. Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy. Metals 2015, 5, 1148-1162.

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