A comparative machinability study on titanium alloy Ti-6Al-4V during dry turning by cryogenic treated and untreated condition of uncoated WC inserts

Kumar, U. Ashok; Senthil, P.

doi:10.1016/j.matpr.2019.09.121

Cited by 18 publications

(13 citation statements)

References 6 publications

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“…To minimize tool wear rate, improve surface integrity of workpiece, understand dominant mechanisms for tool wear and establish optimal parameters for specific machining operation, different conditioning of the workpiece or tool were performed. The conditioning approach involved using lubrication [48][49][50], laser or plasma heating, cryogenic cooling [49], intermittent cutting [51] or combination of two or more of these conditions [52][53][54]. Additionally, the in-service performance of existing and newly modified cutting tools was evaluated [9,[55][56][57][58].…”

Section: Conventional Machiningmentioning

confidence: 99%

“…The advantage of this approach is that it is environmentally friendly because the use of lubricants that are not environmentally friendly is eliminated. Some researchers reported that tool wear rate was reduced since workpiece was less sticky and coefficient of friction was minimized when cryogenic cooling was applied [8,53]. Additionally, feed force and cutting force were significantly reduced up to 50% under optimised conditions during machining of Ti-6Al-4V [84,85].…”

Section: Cryogenic Coolingmentioning

confidence: 99%

“…On the surface roughness of machined workpiece, researchers have shown that cryogenic treatment of tool offer superior surface finish over dry machining and continuous flooding machining [53,86]. It is important to point out that researchers focused more on understanding the effect of cryogenic cooling on tool wear rate, chip formation and cutting force rather than surface finish of the workpiece.…”

Section: Cryogenic Coolingmentioning

confidence: 99%

“…As shown in Table S1, Tungsten carbide based tools are mostly used in conventional machining [53,86], but researchers have explored different alternatives to minimize or prevent tool wear through coating, imprinting microgrooves, electrical insulation [39] or comparing different tools with newly designed ones. Maity and Pradhan [89] reported that improved machinability was obtained when microgrooves were imprinted on the rake surface of the tool prior to machining.…”

Section: Exploration Of Cutting Toolsmentioning

confidence: 99%

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An overview of conventional and non-conventional techniques for machining of titanium alloys

et al. 2020

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Machining is one of the major contributors to the high cost of titanium-based components. This is as a result of severe tool wear and high volume of waste generated from the workpiece. Research efforts seeking to reduce the cost of titanium alloys have explored the possibility of either eliminating machining as a processing step or optimising parameters for machining titanium alloys. Since the former is still at the infant stage, this article provides a review on the common machining techniques that were used for processing titanium-based components. These techniques are classified into two major categories based on the type of contact between the titanium workpiece and the tool. The two categories were dubbed conventional and non-conventional machining techniques. Most of the parameters that are associated with these techniques and their corresponding machinability indicators were presented. The common machinability indicators that are covered in this review include surface roughness, cutting forces, tool wear rate, chip formation and material removal rate. However, surface roughness, tool wear rate and metal removal rate were emphasised. The critical or optimum combination of parameters for achieving improved machinability was also highlighted. Some recommendations on future research directions are made.

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Section: Conventional Machiningmentioning

confidence: 99%

Section: Cryogenic Coolingmentioning

confidence: 99%

Section: Cryogenic Coolingmentioning

confidence: 99%

Section: Exploration Of Cutting Toolsmentioning

confidence: 99%

See 2 more Smart Citations

An overview of conventional and non-conventional techniques for machining of titanium alloys

et al. 2020

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“…Therefore, a machinability assessment should be considered in the development of the manufacturing processes to ensure the desired surface integrity of the machined workpieces as mentioned in the open literature [6,7]. In addition, the selection of appropriate machining parameters is necessary to increase the life of the cutting tool and control the machining costs [8].…”

Section: Introductionmentioning

confidence: 99%

Multi-Response Optimization in High-Speed Machining of Ti-6Al-4V Using TOPSIS-Fuzzy Integrated Approach

et al. 2020

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Titanium alloys are widely used in various applications including biomedicine, aerospace, marine, energy, and chemical industries because of their superior characteristics such as high hot strength and hardness, low density, and superior fracture toughness and corrosion resistance. However, there are different challenges when machining titanium alloys because of the high heat generated during cutting processes which adversely affects the product quality and process performance in general. Thus, optimization of the machining conditions while machining such alloys is necessary. In this work, an experimental investigation into the influence of different cutting parameters (i.e., depth of cut, cutting length, feed rate, and cutting speed) on surface roughness (Rz), flank wear (VB), power consumption as well as the material removal rate (MRR) during high-speed turning of Ti-6Al-4V alloy is presented and discussed. In addition, a backpropagation neural network (BPNN) along with the technique for order of preference by similarity to ideal solution (TOPSIS)-fuzzy integrated approach was employed to model and optimize the overall cutting performance. It should be stated that the predicted values for all machining outputs demonstrated excellent agreement with the experimental values at the selected optimal solution. In addition, the selected optimal solution did not provide the best performance for each measured output, but it achieved a balance among all studied responses.

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Room‐/High‐Temperature Mechanical Properties of Titanium Matrix Composites Reinforced with Discontinuous Carbon Fibers

et al. 2021

Adv Eng Mater

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Titanium (Ti) and its alloys possessing high specific strength, specific stiffness, good heat and corrosion resistance, and a relatively low density are widely used as structural materials in aviation, aerospace, automotive, biomedical, and many other industry fields. [1][2][3] TiÀ6AlÀ4V (TC4) is the most representative Ti alloy because of its overall excellent room-temperature properties. [4,5] However, the high-temperature mechanical properties of the TC4 alloy are relatively poor. The current working temperature of TC4 is lower than 500 C, which is much lower than some other alloys such as steel and nickel-based superalloys. [6,7] In addition, Ti alloys usually have poor electrical and thermal conductivity (around 10 W/ (m K)), [8] which greatly limits their applications. [9][10][11] Introducing reinforcements with high strength and high thermal conductivity in Ti alloys to make a Ti matrix composite (TMC) is an effective method to improve its overall properties. [12][13][14] Carbon fiber (CFs) is a fiber material with excellent physical, mechanical, and thermal properties. Its diameter is on the level of several micrometers, while the length can reach up to centimeters. This characteristic makes them not only possess high aspect ratios but also be easier to disperse homogeneously in metal matrices compared with nanocarbon reinforcements. [15][16][17] The density of CFs is only %1.80 g cm À3 (40% of Ti) but the axial tensile strength of CFs is above 3.5 GPa (>300% of Ti). CFs' high-temperature resistance ranks among the top in all chemical fibers, [18] which are shown to be ultrahigh temperature (over 2000 C) resistant in the nonoxidizing environment. Last but not least, the thermal conductivity of CFs is around 5000 W/(m K) (%500 times of Ti). Therefore, CF is a promising reinforcement to prepare high-performance TMCs, which can be expected to make up the aforementioned shortcomings of Ti alloys.Currently, continuous long CFs are often applied to fabricate high-strength TMCs. [19][20][21][22][23] Even et al. [24] adhered long CFs on the surface of titanium alloy powder by viscous organic polymers and then used hot isostatic pressing (HIP) to produce continuous CFs-reinforced TMCs under the conditions of 600À700 C, 200 MPa, and 1 h. The composites were all above 98% in density and the ultimate tensile strength (UTS) reached 600 MPa at room temperature. Yang et al. [25] used copper-coated continuous CF cloth as reinforcement and TC4 as matrix. After they were compressed and stacked on top of each other, CF cloth/TC4 composites were manufactured by spark plasma sintering (SPS). The compressive yield strength (YS) increased by 370 MPa compared with TC4 matrix at a strain rate of 4200 s À1 because of the tight interface bonding. Overall, the fabrication process of the aforementioned continuous CFs-reinforced TMCs is complicate. In addition, they can only achieve good performance in certain specific directions, showing anisotropic characteristics.

show abstract

A comparative machinability study on titanium alloy Ti-6Al-4V during dry turning by cryogenic treated and untreated condition of uncoated WC inserts

Cited by 18 publications

References 6 publications

An overview of conventional and non-conventional techniques for machining of titanium alloys

An overview of conventional and non-conventional techniques for machining of titanium alloys

Multi-Response Optimization in High-Speed Machining of Ti-6Al-4V Using TOPSIS-Fuzzy Integrated Approach

Room‐/High‐Temperature Mechanical Properties of Titanium Matrix Composites Reinforced with Discontinuous Carbon Fibers

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