| dc.description.abstract | This article describes the TiAlN PVD coated carbide drill tool performance after
being used for drilling of Ti-6246 Titanium alloy. Every drill bit was used for single drilling
and then being observed with SEM from flank and rake view. Taguchi method L18 design of
experiment was used to find the optimum parameters. Wear was not found in this research,
however, the tool delamination and tool chipping was evidenced, even if drilling only 10 mm
depth. Tool experienced built-up edge in the outer blade, inner blade and at the chisel. This
BUE can be seen at both view, i.e. rake and flank sides. BUE is the most dominant
deterioration and inevitably in drilling this alloy, regardless the parameters applied. Tool
delamination may occur during mechanism of peeling off the BUE. While chipping was
related to higher feed rate, that may relate to high MRR. Analysing data using Minitab 17
shows that combination of drilling without cooling, 30 mm deep, cutting speed of 50 m/min
and feed rate of 0.15 mm/min would result in the best performance of TiAlN tool for drilling
Ti6246 as received. | en_US |
