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Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy

Civil, Material and Manufacturing Engineering Department, EII, University of Malaga, Malaga 29071, Spain
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Metals 2020, 10(5), 631; https://doi.org/10.3390/met10050631
Received: 12 March 2020 / Revised: 9 May 2020 / Accepted: 11 May 2020 / Published: 12 May 2020
(This article belongs to the Special Issue Sustainable Manufacturing of Light Alloys)
Fatigue behavior takes special relevance in structural parts for aircraft due to safety reasons. Despite its environmental advantages, dry machining of these parts may negatively affect their surface integrity, which may lead to a reduction in fatigue life. Nevertheless, there is a lack of research focused on the analysis of the cutting parameters influence on fatigue behavior in dry machining of aeronautical aluminum alloys, in spite of its importance. Therefore, in this work, an analysis of the cutting speed and feed influence on fatigue behavior of dry turned UNS A97075-T6 alloy is presented. The stress-fatigue life curves have been obtained and corrected according to the applied cutting parameters values. Additionally, the surface roughness and two macro-geometrical deviations (cylindricity and concentricity) have been controlled. The experimental results have revealed that fatigue life is reduced when high values of cutting speed and feed are combined. Finally, a parametric potential equation for fatigue life, as a function of the load and the cutting parameters, has been developed. The relation has been obtained for the theoretical fracture section and, as the main novelty, corrected for the real one.
Keywords: UNS A97075; dry machining; surface integrity; fatigue behavior; aluminum alloys; parametric equations UNS A97075; dry machining; surface integrity; fatigue behavior; aluminum alloys; parametric equations
MDPI and ACS Style

Béjar, S.M.; Vilches, F.J.T.; Gamboa, C.B.; Hurtado, L.S. Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy. Metals 2020, 10, 631.

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