Surface integrity of finished turned Ti–6Al–4V alloy with PCD tools using conventional and high pressure coolant supplies

Ezugwu, E. O.; Bonney, J.; Silva, Rosemar B. da; Çakır, Orhan

doi:10.1016/j.ijmachtools.2006.08.005

Cited by 190 publications

(83 citation statements)

References 15 publications

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“…For high pressure water jet assisted machining, the level of strain hardening decreases more rapidly to the stabilized value of 2° corresponding to that of original material ( Figure 13). These results are consistent with the micro-hardness analysis conducted by Ezugwu et al (2007) on a Ti6Al4V alloy machined under different high coolant pressures. These authors show a clear tendency of minimizing the hardening effect with increasing coolant pressure.…”

Section: Influence Of High Pressure Coolant On Surface Integritysupporting

confidence: 89%

Influence of High-Pressure Coolant Assistance on the Machinability of the Titanium AlloyTi555–3

Braham-Bouchnak

Germain

Morel

et al. 2015

Machining Science and Technology

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ABSTRACTThe originality of this paper is the quantification of productivity gains and the improvement in surface integrity seen for a recent titanium alloy that is seeing increasing use in the aeronautical industry. The Ti555-3 titanium alloy, which is starting to find greater application in the aeronautical field, exhibits certain difficulties in terms of machining. High Pressure Coolant (HPC) assisted turning consists of projecting a high pressure coolant jet between the chip and the tool. Comparisons are made between assisted turning using variable jet pressure and conventional turning (dry and classical lubrication). It is shown that it is possible to improve productivity by using HPC assisted machining. The results highlight good chip fragmentation and a great improvement of tool life with HPC assistance. Surface integrity is also shown to be improved, through surface roughness parameters which decrease, and surface residual stresses which become more compressive. These effects have been attributed to the thermo-mechanical action of eray 49000 Angers, France.the coolant jet resulting in lower cutting forces, lower coefficient of friction and lower temperature in the cutting zone.

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Section: Influence Of High Pressure Coolant On Surface Integritysupporting

confidence: 89%

Influence of High-Pressure Coolant Assistance on the Machinability of the Titanium AlloyTi555–3

Braham-Bouchnak

Germain

Morel

et al. 2015

Machining Science and Technology

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“…Michiko et al 34 explored the possibility of improvement in cutting efficiency using PCD tool having high thermal conductivity during titanium alloy machining. Ezugwu et al 35 reported that surface finish generated during machining Ti-6Al-4V with PCD tools is generally acceptable and free of physical damages such as tears, laps or cracks for all cutting conditions investigated. PCD would be the most functionally satisfactory commercial available cutting tool material for machining titanium alloys in comparison to carbide and PCBN tools 28 .…”

Section: Analysis Of Surface Roughness and Hardness In Titanium Alloymentioning

confidence: 99%

“…ground surfaces. Generally, the hardening effect is due to high plastic flow rate combining with the heat generation at the primary shear zone 35 . Flood lubrication increases the access of the coolant to the chip-tool interface and contributes to reducing friction coefficient and the resistance to primary shear stress 35 .…”

Section: Effect Of Lubricating Modementioning

confidence: 99%

“…Generally, the hardening effect is due to high plastic flow rate combining with the heat generation at the primary shear zone 35 . Flood lubrication increases the access of the coolant to the chip-tool interface and contributes to reducing friction coefficient and the resistance to primary shear stress 35 . Heat generation is decreased and consequently lower temperatures and plastic flow, resulting in lesser hardening effect as well as micro structural damage 29 .Softening of the machined surface implies improved ductility and yield strength of the Ti-6Al-4V alloy, thereby improving process ability.…”

Section: Effect Of Lubricating Modementioning

confidence: 99%

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Analysis of surface roughness and hardness in titanium alloy machining with polycrystalline diamond tool under different lubricating modes

Revankar¹,

Shetty

Rao

et al. 2014

Mat. Res.

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The present work deals with the investigation on machining of difficult-to-machine material titanium alloy (Ti-6Al-4V) using poly crystalline diamond (PCD) tool under different coolant strategies, namely dry, flooded and MQL. Taguchi technique has been employed and the optimization results indicated that MQL lubricating mode with cutting speed of 150 m/min, feed rate of 0.15 mm/rev, nose radius of 0.6 mm and 0.25 mm depth of cut is necessary to minimize surface roughness and dry mode with cutting speed of 150 m/min, feed rate of 0.15 mm/rev, nose radius of 0.6 mm and 0.75 mm depth of cut is necessary to maximize surface hardness. The results indicate the substantial benefit of the minimum quantity of lubrication (MQL) and justify PCD inserts to be the most functionally satisfactory commercially available cutting tool material for machining titanium alloys for better surface finish and hardness.

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“…The most practical and effective way to enhance the machining performance in cutting difficult-to-cut materials is to reduce cutting temperature (Evans, 1991a;Wane et al, 1996;Itoigawa et al, 2006 Ezugwu et al (Ezugwu et al, 2007) when machining Ti-6Al-4V with high-pressure coolant supplies and the recorded surface roughness values were found to be below the tool rejection criteria. But during machining of Ti-6Al-4V the performance of CBN tools in terms of tool life was found to be poor compared to uncoated carbide tools and probably it is due to rapid notching and excessive chipping of the cutting edges (Ezugwu et al, 2005a).…”

Section: Introductionmentioning

confidence: 99%

Improving tool life using cryogenic cooling

Khan

Musse

2008

Journal of Materials Processing Technology

122

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Surface integrity of finished turned Ti–6Al–4V alloy with PCD tools using conventional and high pressure coolant supplies

Cited by 190 publications

References 15 publications

Influence of High-Pressure Coolant Assistance on the Machinability of the Titanium AlloyTi555–3

Influence of High-Pressure Coolant Assistance on the Machinability of the Titanium AlloyTi555–3

Analysis of surface roughness and hardness in titanium alloy machining with polycrystalline diamond tool under different lubricating modes

Improving tool life using cryogenic cooling

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