Investigation and modelling of the cutting forces in turning process of the Ti-6Al-4V and Ti-6Al-7Nb titanium alloys

Filho, Sérgio Luiz Moni Ribeiro; Pereira, Robson Bruno Dutra; Lauro, Carlos Henrique; Brandão, Lincoln Cardoso

doi:10.1007/s00170-018-3110-7

Cited by 11 publications

(10 citation statements)

References 24 publications

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“…The reduction in temperature by interaction of higher cutting speed and higher feed rates is due to reduced machining time which reduces the temperature generated by the cutting process. Moreover, at higher cutting speed there is a softening of material by the high temperature generated which decreases the cutting force associated with higher feed rates [ 18 ].…”

Section: Resultsmentioning

confidence: 99%

“…With increasing depth of cut, the cutting temperature increased in both cases. Increasing depth of cut requires an increase in cutting force [ 18 ] and more energy will be dissipated in the cutting process as more material is removed by the workpiece, with higher MRRs and higher cutting temperatures. These results agree with [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

“…Studies of the surface integrity of titanium alloys have included the effects on measured surface roughness [ 15 ], residual stress [ 16 ] and microhardness [ 17 ] of varying cutting factors such as process parameters and tool geometry. The effect of these factors on cutting force [ 18 ], temperatures generated [ 19 ], and friction between the tool and target material [ 20 ] have also been investigated as all influence surface quality. Surface roughness is the most important factor when measuring surface integrity due to its determining influence on material service life—high levels of surface roughness lead to rapid wear of the machined surface and increase the risk of cracks and corrosion due to surface irregularities [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Precision Hard Turning of Ti6Al4V Using Polycrystalline Diamond Inserts: Surface Quality, Cutting Temperature and Productivity in Conventional and High-Speed Machining

et al. 2020

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This article presents the results of an experimental investigation into the machinability of Ti6Al4V alloy during hard turning, including both conventional and high-speed machining, using polycrystalline diamond (PCD) inserts. A central composite design of experiment procedure was followed to examine the effects of variable process parameters; feed rate, cutting speed and depth of cut (each at five levels) and their interaction effects on surface roughness and cutting temperature as process responses. The results revealed that cutting temperature increased with increasing cutting speed and decreasing feed rate in both conventional and high-speed machining. It was found that high-speed machining showed an average increase in cutting temperature of 65% compared with conventional machining. Nevertheless, high-speed machining showed better performance in terms of lower surface roughness despite using higher feed rates compared to conventional machining. High-speed machining of Ti6Al4V showed an improvement in surface roughness of 11% compared with conventional machining, with a 207% increase in metal removal rate (MRR) which offered the opportunity to increase productivity. Finally, an inverse relationship was verified between generated cutting temperature and surface roughness. This was attributed mainly to the high cutting temperature generated, softening, and decreasing strength of the material in the vicinity of the cutting zone which in turn enabled smoother machining and reduced surface roughness.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Precision Hard Turning of Ti6Al4V Using Polycrystalline Diamond Inserts: Surface Quality, Cutting Temperature and Productivity in Conventional and High-Speed Machining

et al. 2020

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“…That is due to high metal removal rate by higher depth of cut which increases temperature. Also, increasing cutting force by high depth of cut results in increasing friction and generation high cutting temperature [28].…”

Section: Results Of Coated Ceramic Insertmentioning

confidence: 99%

Relative performance of coated ceramic and CBN inserts in hard turning of Ti6Al4V alloy

Abdelnasser

Barakat

Elsanabary

et al. 2020

Port-Said Engineering Research Journal

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Characteristics of cutting insert are key factors for the reliability of machining of difficult-to-cut materials such as Ti6Al4V alloy. Therefore, in this paper a comparison between the performance of two different materials, ceramic insert coated by (Al2O3+TiNC) and CBN, when turning Ti6Al4V alloy in dry environment. Effect of process parameters, feed rate, cutting speed and depth of cut, and their interactions on measured cutting temperature were examined for both inserts. Taguchi method was utilized to design of experiments (L9) and the results were analyzed by analysis of variance (ANOVA). From the results, CBN insert showed a good behavior for heat dissipation during machining compared with coated ceramic insert with a reduction in cutting temperature by 28%. Moreover, it was found that cutting temperature increased by increase in cutting speed and depth of cut and decrease in feed rate when using the two types of insert. In addition, it was observed that cutting temperature was affected by varying process parameters when machining by CBN insert more than the case of coated ceramic tool. The significant parameter affected cutting temperature in the case of CBN was feed rate followed by cutting speed. While at coated ceramic insert, the most significant parameters effect on cutting temperature was cutting speed.

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“…At lower cutting speed, a proportional relationship between depth of cut and surface roughness was noticed. This may be due to a higher force and vibration at higher depth of cut [37]. On the other hand, at higher cutting speed this may not take place due to material softening because of high heat generation [34,38].…”

Section: Figure 7: Effect Of Interaction Of Feed Rate and Depth Of Cumentioning

confidence: 99%

Experimental investigation of generated surface roughness in hard turning of Ti6Al4V using coated ceramic and CBN inserts

Abdelnasser

Barakat

Elsanabary

et al. 2020

Port-Said Engineering Research Journal

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Surface finish of machined parts is a significant quality mark for a range of applications such as aerospace, automotive, power transmission and generation. Therefore, optimization of surface roughness is the key factor for reliability in machining difficult-to-cut materials such as titanium-based alloys. In this study, an investigation into hard turning of Ti6Al4V alloys with varying process parameters and cutting tool materials was carried out. This study aims to compare the generated surface roughness when turning Ti6Al4V alloys using CBN and coated ceramic inserts, independently, under the same values of feed rate, cutting speed and depth of cut. The experiments were designed using Taguchi L9 and the exponential results were examined by the analysis of variance (ANOVA). The effect of process parameters and their interactions on generated surface roughness was evaluated for the two inserts. It was found improvement of surface roughness by 34% was achieved when using coated ceramic insert compared with the results obtained using CBN insert under the same range cutting conditions. CBN insert gave a better result at smallest depth of cut (0.15 mm), low feed rate (0.1 mm/rev) and high cutting speed (100 m/min) while coated ceramic tool gave a minimum surface roughness at depth of cut (0.2 mm), feed rate (0.1 mm/rev) and high cutting speed (100 m/min).

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Investigation and modelling of the cutting forces in turning process of the Ti-6Al-4V and Ti-6Al-7Nb titanium alloys

Cited by 11 publications

References 24 publications

Precision Hard Turning of Ti6Al4V Using Polycrystalline Diamond Inserts: Surface Quality, Cutting Temperature and Productivity in Conventional and High-Speed Machining

Precision Hard Turning of Ti6Al4V Using Polycrystalline Diamond Inserts: Surface Quality, Cutting Temperature and Productivity in Conventional and High-Speed Machining

Relative performance of coated ceramic and CBN inserts in hard turning of Ti6Al4V alloy

Experimental investigation of generated surface roughness in hard turning of Ti6Al4V using coated ceramic and CBN inserts

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