Hole-making processes and their impacts on the microstructure and fatigue response of aircraft alloys
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A comparative study on conventional drilling and helical milling has been reported under the context of aircraft alloy hole making. The impacts of these two different machining processes on the microstructures and the fatigue performance of different aircraft alloys have been elaborated. Results show that both alloys undergo more severe surface/subsurface plastic deformation under conventional drilling comparing to helical milling process. Helical milling leads to a longer coupon fatigue life compared to conventional drilling for both alloys. The fatigue life of Al 2024-T3 is significantly longer than that of Ti-6Al-4V under all machining conditions. The use of coolant generally produces less damaged surface and leads to enhanced fatigue performance of the machined alloys. In addition, the machined surface roughness has been studied to further elaborate the effects of different machining processes.
KeywordsAircraft alloys Drilling Helical milling Fatigue
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Conflict of interest
The authors declare that they have no conflict of interest.
- 1.Riley A, Aardema, B, Vosbury P, Eiff MA, Frautschy HG, Serkenburg R, Shaffer D, Wild T, Michmerhuizen T (2008) Aviation maintenance technician handbook. Department of Transportation: Federal Aviation Administration. Newcastle, WashGoogle Scholar
- 2.Zhang S, Zhao D (2012) Aerospace materials handbook. CRC PressGoogle Scholar
- 7.Latger F, Harris T, Björklund S (2002) Drilling cost model. SAE Technical Paper 2002–01-632Google Scholar
- 10.ISO 286–2:2010. Geometrical product specifications (GPS)—ISO code system for tolerances on linear sizes—part 2: tables of standard tolerance classes and limit deviations for holes and shaftsGoogle Scholar
- 22.Pei X, Chen W, Ren B, Han Y (2002) Effect of drilling processes on surface integrity of 7075-aluminum alloy holes. J Beijing University of Aeronautics and Astronautics 28(3):319–322Google Scholar
- 25.Xu JK, Xia K, Xu Z, Zhang LS, Yu ZJ, Yu HD (2015) Study on hardness and tribological properties of highspeed wire electrical discharge machining surface. International Conference on Mechatronics and Automation, BeijingGoogle Scholar
- 27.Songmene V, Khettabi R, Zaghbani I, Kouam J, Djebara A (2011) Machining and machinability of aluminum alloys. In: Kvackaj T (ed) aluminium alloys, theory and applications. InTech. DOI: 10.5772/14888
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