Effect of the interface fatigue strength of NCD coated hardmetal inserts on their cutting performance in milling

Bouzakis, K.‐D.; Skordaris, G.; Bouzakis, E.; Charalampous, Paschalis; Kotsanis, T.; Tasoulas, D.; Kombogiannis, S.; Lemmer, O.

doi:10.1016/j.diamond.2015.09.008

Cited by 24 publications

(16 citation statements)

References 14 publications

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“…Thus, the substrate–coating interface of CVD diamond–coated WC‐Co cutting tools predominantly represents the key location for the initiation of failure mechanisms such as cracks. [ 48 ] Therefore, recent developments regarding cutting tool substrates include the application of silicon‐nitride‐based ceramic composites such as Si 3 N 4 . In comparison to WC‐Co substrates, a superior coating adhesion is attested when combining silicon‐based substrates with a CVD diamond coating.…”

Section: Cutting Tool Applicationmentioning

confidence: 99%

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

et al. 2021

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Section: Cutting Tool Applicationmentioning

confidence: 99%

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

et al. 2021

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“…The interface fatigue strength of a tool coated with a nanocrystalline diamond (NCD) coating affects the milling performance and is effectively measured by an inclined impact test. 8–10…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Development of adhesion force evaluation equipment for nano diamond coated tool using shear method

Lee

Kweon

2020

Measurement and Control

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In this study, we have developed a thin film adhesion evaluation system for diamond coating tool, which is mainly used for CFRP processing. CFRP is widely used in aviation and automobile industries. Because of the high surface hardness of the diamond coating tool, it is difficult to evaluate the adhesive strength of the tool, and it is difficult to quantitatively evaluate the existing adhesion force evaluation method and it is costly. This study has developed an evaluation method to measure the adhesive force based on the data of the grinding process using a low-cost polishing pad. When the frictional force and the shearing force are applied to the specimen by the sanding belt, friction is continuously generated between the coating layer and the belt, and peeling occurs at the moment when a specific load is applied. Acceleration, load, and torque values that occur during each experiment are collected through acceleration sensors, load cells, and torque sensors. The data obtained through the experiments are subjected to FFT processing and analysis. As a result, the peeling point and the critical load value at this point are identified and referred to as the adhesion force of the coating layer.

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“…Diamond coatings deposited on cemented carbide tools are widely used in machining of non-ferrous materials like aluminum alloys, composite and so forth [1][2][3][4][5]. A key issue for ensuring a sufficient diamond coated tool life, especially in milling, is the fatigue strength of diamond coating-substrate interface [6][7][8]. For enhancing the diamond film bonding on its substrate and thus the film adhesion, selective chemical Co-etching is carried out on hard metal tools for decreasing superficially the non-adhesive cobalt [1,4].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Interfacial Fatigue Strength and Milling Behavior of Diamond Coated Tools via Appropriate Annealing

et al. 2020

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This article deals with the potential to reduce the amount of the residual stresses in the diamond films on cemented carbide inserts for improving their effective interfacial fatigue strength and thus their wear resistance. In this context, nano-crystalline diamond coatings (NCD) were deposited on cemented carbide inserts. A portion of these coated tools were annealed in vacuum for decreasing the amount of residual stresses in the film structure. The annealing temperature was appropriately selected for keeping the substrate strength properties invariable after the coating annealing. Inclined impact tests at ambient temperature on the untreated and heat-treated diamond coated tools were conducted for evaluating their effective interfacial fatigue strength. Depending upon the impact load, after a certain number of impacts, damages in the film-substrate interface develop, resulting in coating detachment and lifting. Via appropriate FEM (Finite Element Method)-evaluation of the impact imprints, the residual stresses in the diamond film structure were determined. Milling experiments were conducted for evaluating the cutting performance of the coated tools using aluminum foam as workpiece material. A correlation between the interfacial fatigue strength of diamond coatings and their residual stresses affected by annealings contributed to the explanation of the attained cutting results.

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Effect of the interface fatigue strength of NCD coated hardmetal inserts on their cutting performance in milling

Cited by 24 publications

References 14 publications

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

Ex Situ Residual Stress Analysis of Chemical Vapor Deposited Diamond Coated Cutting Tools by Synchrotron X‐Ray Diffraction in Transmission Geometry

Development of adhesion force evaluation equipment for nano diamond coated tool using shear method

Improvement of the Interfacial Fatigue Strength and Milling Behavior of Diamond Coated Tools via Appropriate Annealing

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