The relationship between the cutting speed, tool wear, and chip formation during Ti-5553 dry cutting

Abstract

The relationship between the cutting speed, tool wear, and chip formation during Ti-5553 dry cutting. International Journal of Advanced Manufacturing Technology, Springer Verlag, 2015Verlag, , vol.76 (n°5-8), pp. 893-912. 10.1007 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@inp-toulouse.fr OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. DOI 10.1007/s00170-014-6326-1 The relationship between the cutting speed, tool wear, and chip formation during Ti-5553 dry cutting Vincent Wagner · Maher Baili · Gilles Dessein Abstract Over the past several years, titanium alloys have been increasingly used in aeronautics. However, they are considered to have poor machinability. The Ti-5553 nearbeta titanium alloy is used in aeronautics to replace Ti-64 and for the production of structural parts, such as landing gears. Due to the low thermal properties and the high mechanical properties presented in this work, this alloy is considered difficult to machine. This work is devoted to understanding the relationship between the chip formation, the cutting process, and the tool wear. The first section studies the evolution of the tool wear. The tests show that tool wear occurs in three steps mainly due to the cutting process and the chip formation. To clarify these points, a section is dedicated to the chip formation and cutting processes. An analytical model is also used to quantify stresses, temperatures, and friction inside the workpiece material and at the tool/chip interface. Chip formation is commonly studied using a tool without wear, which can affect the cutting tool geometry. To verify chip formation and the cutting process during machining, a section describes the chip formation and the cutting processes using worn tools.

Machining Performance of TiAlN-Coated Cemented Carbide Tools with Chip Groove in Machining Titanium Alloy Ti-6Al-0.6Cr-0.4Fe-0.4Si-0.01B

“…Elements of the cutting tool and adherent material of the workpiece at the bonding interface can diffuse into each other's structure [8]. Constituent diffusion induces the decrease of hardness and wear resistance of the tool when tungsten and cobalt diffuse into the workpiece [5,28,29]. There are several wear mechanisms in the present machining: adhesive wear, diffusion wear, stripping, and crater wear.…”

Investigation of contact phenomena in turning using tools made of low-alloy high-speed steels

“…Regardless of the differences in the values and trends of the normal and shear stresses at the contact interfaces, minimum tool wear occurs and apparent friction coefficient reaches its lowest value at the optimum cutting speed [3,4]. The results reported by Wagner et al [5] show that tool wear occurs in a few steps mainly due to the cutting process and chip formation. It is particularly important to examine the point of contact for tools made of high-speed steel characterized by the phenomenon of buildup accumulation.…”

“…Improving properties of tools surfaces and development of ecological technologies of heat treatment can be done by using, for example, physical vapour deposition (PVD) methods.There is a variety of powder metallurgical manufacturing routes for high-speed steels resulting in metallurgical and economic advantages [5]. The properties of tools made of high-speed steels can be improved by application of thermochemical treatment, gas nitriding, ionised nitriding, vacuum nitriding and gas sulfonitriding [6,7].…”

High-pressure water-jet-assisted machining of Ti555-3 titanium alloy: investigation of tool wear mechanisms

“…The past decades have seen the development of new nearbeta alloys that have better mechanical properties, improved fracture toughness and good hardenability [2,3]. However, these alloys such as Ti-10V-2Fe-3Al and Ti-5Al-5V-5Mo-3Cr raise significant machinability problems [4], leading to severely reduced cutting conditions. This in turn leads to lower productivity [5].…”