Comparison of TiAlN, AlCrN, and AlCrN/TiAlN coatings for cutting-tool applications

Kumar, T. Sampath; Prabu, S. Balasivanandha; Manivasagam, Geetha; Padmanabhan, K. A.

doi:10.1007/s12613-014-0973-y

Cited by 57 publications

(9 citation statements)

References 15 publications

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“…The TiAlN/TiCN coated insert has achieved 140.05 nm, and TiCN/TiAlN coated insert has achieved 220.49 nm as surface roughness values which were measured using AFM. The differences in the coating compositions, process constraints are the reasons for the deviations in the surface morphology of the cutting insert [15][16][17]. The TiAlN/TiCN and TiAlN/TiCN bilayer coated carbide tools were studied for the investigational trials and the coating performance were assessed on machining custom 450 alloy.…”

Section: Coating Detailsmentioning

confidence: 99%

Machinability Investigations on Aerospace Custom 450 Alloy Using TiAlN/TiCN, TiCN/TiAlN Coated and Uncoated Carbide Tools

Kumar¹,

Margabandu²,

Radhakrishnan³

et al. 2021

JESA

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In this present research, the machinability studies of TiAlN/TiCN, TiCN/TiAlN coated and uncoated inserts were investigated on machining custom 450 alloy. The machining input parameters such as feed rate (f), cutting speed (V) and depth of cut (d) are set using orthogonal array. The machining output parameters such as surface roughness, tool wear and cutting forces were studied for its parametric contribution and it was analyzed using Analysis of Variance (ANOVA). Further, the tool wear obtained was studied using scanning electron microscopic images and energy dispersive spectroscopy analysis was conducted to check the addition of work material elements to the coated tool surface. The results show that, the feed rate is the most contributing factor in deciding resultant forces, surface roughness and tool wear respectively. TiAlN/TiCN coated carbide tool has obtained improved machinability, when compared to TiCN/TiAlN coated carbide and uncoated carbide inserts. To obtain one optimal level for all three responses of three types of tools, multi criteria decision making approach, named utility concept approach is selected. Based on the MCDM analysis, it is found that trial number 4 gives better experimental output of improved surface integrity, lower resultant force and less tool wear for all types of tools.

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Section: Coating Detailsmentioning

confidence: 99%

Machinability Investigations on Aerospace Custom 450 Alloy Using TiAlN/TiCN, TiCN/TiAlN Coated and Uncoated Carbide Tools

Kumar¹,

Margabandu²,

Radhakrishnan³

et al. 2021

JESA

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“…The TiAlN–AlCrN multilayer coating exhibits superior mechanical properties such as hardness, scratch resistance and Young’s modulus, compared to conventional coatings such as TiAlN, AlCrN and TiN. 52,53 The insert is mounted on an STGCR1010-09 – SUMITOMO tool holder. The tool holder has a 7° clearance angle and 90° approach angle.…”

Section: Micro Turning Experimentsmentioning

confidence: 99%

Worn tool geometry–based flank wear prediction in micro turning

Elias

Asams

Mathew

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Mechanical micromachining techniques have gained much popularity in the manufacturing of microcomponents with complex shapes in the past couple of decades. Machining at the microscale poses several challenges such as size effect, which highly influences the material deformation mechanism resulting in a nonlinear variation in specific cutting energy, which accelerates the tool wear. Since micromachining is associated with micro-features, high precision and tight tolerances, the prediction of tool wear in advance is essential. Calibrated tool-wear models are generally used for the prediction of tool wear in the macro machining regime, whereas the applicability of these tool-wear models in the microscale machining is not explored much in the past. In the present work, Usui tool-wear model and worn tool geometry–based Malakizadi model are calibrated for the tool flank wear prediction during micro turning of Ti-6Al-4V alloy, using a hybrid approach involving both finite element simulations and cutting experiments. The validation experiments show that both the models can satisfactorily predict the tool-wear rate during micro turning with a percentage error of less than 15%. Results indicate that the worn tool geometry–based tool-wear model outperforms the conventional Usui model as it incorporates the instantaneous tool geometry, which also makes it suitable for different tool geometries.

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“…The coating process was performed in a vacuum chamber, where the material is evaporated and deposited on the substrate. Argon is introduced in the chamber with a flow rate of approximately 800 ml/min and plasma is generated by applying a voltage of typically 200 V [15]. The ions collide with the coating material and particles are removed.…”

Section: Specimensmentioning

confidence: 99%

“…These elements settle on the contact area of the base material and the layer grows atom by atom. The coating process is carried out at 450 °C [15].…”

Section: Specimensmentioning

confidence: 99%

Tribological and Thermal Investigation of Modified Hot Stamping Tools

Neubauer¹,

Merklein²

2019

Tribol. Ind.

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Direct hot stamping is an established manufacturing process to produce safety-relevant car body components, while t-he hot blank is formed and quenched simultaneously in a water cooled press. In order to protect the semi-finished parts against oxidation the surfaces are coated with aluminum silicon. As a side effect this coating system leads to adhesive wear on the tool surface, which reduces the tool life. Due to the high temperatures it is not possible to use lubricants as wear protection. For this reason a suitable surface modification for hot stamping tools is required to increase the wear resistance. In the scope of this study the tribological behavior of different modificatiosn is investigated. The main purpose of these wear protective layers is to decrease the adhesive wear on the tool surface. The wear characterization is carried out with a modified pin-on-disc test. During the experiments the pin is guided over the blank with a robot system. In addition, the contact area is cooled after each wear track to simulate the thermal alternating stresses of the hot stamping process. For the evaluation of the wear behavior a new developed analysis method is used, which enables the calculation of the adhesive and abrasive wear volume.

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Comparison of TiAlN, AlCrN, and AlCrN/TiAlN coatings for cutting-tool applications

Cited by 57 publications

References 15 publications

Machinability Investigations on Aerospace Custom 450 Alloy Using TiAlN/TiCN, TiCN/TiAlN Coated and Uncoated Carbide Tools

Machinability Investigations on Aerospace Custom 450 Alloy Using TiAlN/TiCN, TiCN/TiAlN Coated and Uncoated Carbide Tools

Worn tool geometry–based flank wear prediction in micro turning

Tribological and Thermal Investigation of Modified Hot Stamping Tools

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