Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy

Abstract

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.

Influence of Tool Wear on Form Deviations in Dry Machining of UNS A97075 Alloy

“…Additionally, this tool geometry allows comparing the experimental results with previous work in relation to the dry machining of this alloy, carried out by the authors within a wider research project. In these works, a parametric analysis of the surface roughness [24,25], geometrical deviations [32,34,35], micro-hardness [28], fatigue behavior [5], tool wear [22] and chip geometry [29] was performed, keeping the tool geometry constant.…”

“…With regard to the geometrical tolerances (form, orientation, location and run-out) [3], these play a very important role both in the parts assembly and functionality [4]. These deviations may even affect mechanical properties as important as fatigue behavior [5]. In fact, some standards for conducting fatigue tests require maximum tolerances for certain geometrical deviations [6].…”

Machining of Al-Cu and Al-Zn Alloys for Aeronautical Components

“…Shape quality criteria for turning parts include roundness and parallelism deviations (PD). However, PD is easier to measure so its analysis is more usual [53,54]. This criterion is also affected by the cutting parameters as is shown in Figure 11 [55].…”

Development of the Airline Business Macroeconomics Dynamics Models

“…[16][17][18][19][20][21][22][23]. And the approach could be recommended for implementation in various other spheres that share similar characteristics [24][25][26][27][28][29][30][31][32].…”