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Tuesday, June 24, 2008 - 1:30 PM

Processing and properties of TIMETAL 54M, a new alpha-beta alloy with improved machinability

S. Nyakana, TIMET, Henderson, NV; M. Harper, J. Fanning, TIMET-R&D, Henderson, NV

TIMETAL 54M (Ti-5Al-4V-0.6Mo-0.4Fe) is an alpha-beta titanium alloy that was developed to improve upon the overall production costs of Ti-6Al-4V while providing similar properties.  TIMET has produced significant quantities of 54M via Electron-Beam Single-Melting (EBSM).  The alloy is being evaluated for both aerospace and non-aerospace applications. Prior studies have shown that 54M provides improved drill machinability using conventional carbide tools, indicating that 54M may enable improved cutting tool life and/or accommodate increased cutting speeds.  In a recent trial, a beta-extruded 54M shape was machined alongside a production Ti-6Al-4V airframe component; this experience reinforced the machinability benefit of 54M.  Mechanical properties of the machined component are comparable to typical properties for similarly processed Ti-6Al-4V.