Abstract
Slot milling is presented as a potential manufacturing route for aerospace component feature production when machining γ-TiAl intermetallic alloy Ti–45Al–2Mn–2Nb+0.8vol.% TiB2XD using 2mm diameter AlTiN coated WC ball nose end milling cutters. When operating with flood cutting fluid at v=88m/min, f=0.05mm/tooth, d=0.2mm, maximum flank wear was ∼65μm after 25min. SEM micrographs of slot surfaces show re-deposited/adhered and smeared workpiece material to a length of ∼50μm. Brittle fracture of the slot edges was restricted to <10μm with sporadic top burr formation observed up to ∼20μm. Cross sectional micrographs of the slot sidewalls showed bending of the lamellae limited to within 5μm.
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