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

Metals

Kamel Moussaoui¹  Michel Mousseigne¹  Johanna Senatore¹  Remy Chieragatti³  Pascal Lamesle² 

[1] Institut Clement Ader, Universite Toulouse 3-Paul Sabatier, 3 rue Caroline Aigle, F-31400 Toulouse, France; E-Mails:;Intitut de Recherche Technologique, 4 rue Augustin Fresnel, 57070 Metz, France; E-Mail:;Institut Superieur de l’Aeronautique et de l’Espace, 10 avenue Edouard-Belin, 31055 Toulouse Cedex 4, France; E-Mail:

关键词: machining;    residual stress;    surface integrity;    fatigue life;    titanium alloys;   

DOI  :  10.3390/met5031148

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.