Comparison of the machinabilities of Ti6Al4V and TIMETAL® 54M using uncoated WC–Co tools

Tribological phenomena and tool wear mechanisms during machining of hard-to-cut TiAl6V4 aerospace alloy have been investigated in detail. Since cutting tool wear is directly affected by tribological phenomena occurring between the surfaces of the workpiece and the cutting tool, the performance of the cutting tool is strongly associated with the conditions of the machining process. The present work shows the effect of different machining conditions on the tribological and wear performance of TiB 2 -coated cutting tools compared to uncoated carbide tools. FEM modeling of the temperature profile on the friction surface was performed for wet machining conditions under varying cutting parameters. Comprehensive characterization of the TiB 2 coated vs. uncoated cutting tool wear performance was made using optical 3D imaging, SEM/EDX and XPS methods respectively. The results obtained were linked to the FEM modeling. The studies carried out show that during machining of the TiAl6V4 alloy, the efficiency of the TiB 2 coating application for carbide cutting tools strongly depends on cutting conditions. The TiB 2 coating is very efficient under roughing at low speeds (with strong buildup edge formation). In contrast, it shows similar wear performance to the uncoated tool under finishing operations at higher cutting speeds when cratering wear predominates.

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“…The parameters of deposition are presented elsewhere [10]. The properties of the TiB 2 coating are shown in Table 3.…”

Section: Methodsmentioning

confidence: 99%

“…A major phenomenon during machining of Ti alloys at a lower cutting speed is an intensive buildup edge formation [10]. Previous research shows that the TiB 2 coating with optimized properties can be very efficient when a strong buildup edge forms [11].…”

Section: Introductionmentioning

confidence: 99%

Tribological and Wear Performance of Carbide Tools with TiB2 PVD Coating under Varying Machining Conditions of TiAl6V4 Aerospace Alloy

et al. 2017

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“…Armendia et al [28] measured the cutting forces in orthogonal cutting process for feed 100 μm and depth of cut 2 mm. Cutting velocity ranged from 0.83 to 1.5 m/s.…”

Section: C U T T I N G F O R C E S a N D O V E R A L L F R I C T I mentioning

confidence: 99%

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Miguélez¹,

Soldani²,

Molinari³

2013

International Journal of Mechanical Sciences

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This work is focused on the numerical analysis of adiabatic shear banding in orthogonal cutting of Ti6Al4V alloy. Segmented chip results from adiabatic shear banding, depending on the competition of thermal softening and strain and strain rate hardening. The influence of cutting velocity and feed in the chip segmentation is studied. Also the role of friction at the tool-chip interface and the effect of rheological parameters of the constitutive equation are analyzed. Experimental tests obtained from previous work of the authors [Molinari A, Musquar C, Sutter G, Adiabatic shear banding in high speed machining of Ti-6Al-4V experiments and modeling, Int J Plast, vol. 18, 2002, p. 443-459] and others were used as a reference to validate the models. Cutting forces and the mechanism of plastic flow localization are analyzed in terms of frequency of segmentation and shear band width and compared to experimental data.

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“…Moreover, the low elastic modulus of titanium alloys leads to tool vibrations during chip formation. Several researchers have reported that the machining of titanium alloys is one of the principal challenges for their application [8][9][10][11][12]. Developing new kinds of titanium alloys with increased machinability has been…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing Temperature on the Corrosion Protection of Hot Swaged Ti-54M Alloy in 2 M HCl Pickling Solutions

Sherif

El‐Danaf

Abdo

et al. 2017

Metals

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Abstract:The corrosion of Ti-54M titanium alloy processed by hot rotary swaging and post-annealed to yield different grain sizes, in 2 M HCl solutions is reported. Two annealing temperatures of 800 • C and 940 • C, followed by air cooling and furnace cooling were used to give homogeneous grain structures of 1.5 and 5 µm, respectively. It has been found that annealing the alloy at 800 • C decreased the corrosion of the alloy, with respect to the hot swaged condition, through increasing its corrosion resistance and decreasing the corrosion current and corrosion rate. Increasing the annealing temperature to 940 • C further decreased the corrosion of the alloy.

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Comparison of the machinabilities of Ti6Al4V and TIMETAL® 54M using uncoated WC–Co tools

Cited by 105 publications

References 17 publications

Tribological and Wear Performance of Carbide Tools with TiB2 PVD Coating under Varying Machining Conditions of TiAl6V4 Aerospace Alloy

Tribological and Wear Performance of Carbide Tools with TiB2 PVD Coating under Varying Machining Conditions of TiAl6V4 Aerospace Alloy

Analysis of adiabatic shear banding in orthogonal cutting of Ti alloy

Effect of Annealing Temperature on the Corrosion Protection of Hot Swaged Ti-54M Alloy in 2 M HCl Pickling Solutions

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