Workpiece surface integrity when slot milling γ-TiAl intermetallic alloy

Research output: Contribution to journalArticlepeer-review

Authors

External organisations

  • Rolls Royce PLC

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 + 0.8 vol.% TiB2XD using 2 mm diameter AlTiN coated WC ball nose end milling cutters. When operating with flood cutting fluid at v = 88 m/min, f = 0.05 mm/tooth, d = 0.2 mm, maximum flank wear was ∼65 μm after 25 min. SEM micrographs of slot surfaces show re-deposited/adhered and smeared workpiece material to a length of ∼50 μm. Brittle fracture of the slot edges was restricted to <10 μm with sporadic top burr formation observed up to ∼20 μm. Cross sectional micrographs of the slot sidewalls showed bending of the lamellae limited to within 5 μm.

Details

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume63
Issue number1
Publication statusPublished - 1 Jan 2014

Keywords

  • Slot milling, Surface integrity, Titanium