Hole-making processes and their impacts on the microstructure and fatigue response of aircraft alloys

Dan Sun, Patrick Lemoine, Daniel Keys, Patrick Doyle, Savko Malinov, Qing Zhao, Xuda Qin, Yan Jin

Research output: Contribution to journalArticle

18 Citations (Scopus)
706 Downloads (Pure)

Abstract

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 microstructure and fatigue performance of different aircraft alloys have been elaborated. Results show that both alloys undergo more severe surface/sub-surface 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 also been studied to further elaborate the effects of different machining processes.
Original languageEnglish
Pages (from-to)1719-1726
Number of pages8
JournalInternational Journal of Advanced Manufacturing Technology
Volume94
Issue number5-8
Early online date14 Dec 2016
DOIs
Publication statusPublished - Feb 2018

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