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

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 tes...

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Bibliographic Details
Published inMetals (Basel ) Vol. 5; no. 3; pp. 1148 - 1162
Main Authors Moussaoui, Kamel, Mousseigne, Michel, Senatore, Johanna, Chieragatti, Remy, Lamesle, Pascal
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2015
MDPI
Subjects
Bend tests
Engineering Sciences
Fatigue (materials)
Fatigue life
Fatigue testing
Integrity
Machining
Mechanical engineering
Mechanics
Residual stress
surface integrity
titanium alloys
Titanium base alloys
residual stress
fatigue life
titanium alloys
machining
surface integrity
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Summary: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.
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ISSN:2075-4701
2075-4701
DOI:10.3390/met5031148