Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
Volume 220, Issue 2, Pages 93-107Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1243/095440506X78192
Keywords
surface integrity; Ti-6Al-4V; titanium alloys; turning
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Titanium alloys are used extensively in the aerospace industry and are generally classified as 'hard to machine'. The combination of high strength at elevated temperatures, low thermal conductivity, low modulus of elasticity, and high chemical affinity with all available cutting tool materials means that there are inherent difficulties when machining. The extensive literature detailing all aspects of the machinability of titanium alloys is briefly reviewed; however, little of this refers specifically to surface integrity, which is critical to industries such as aerospace. This paper focuses on the effects that insert geometry had on tool life and workpiece surface integrity when cutting speed, feed rate, and depth of cut were varied. Specifically the effects of edge radius, side cutting edge angle, and edge land are considered. The findings show that whatever combination of tool geometry and operating parameters were used, the surface integrity is remarkably similar, even at relatively high cutting speeds and feed rates.
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