Stress, strain and strain-rate cemented carbide properties determined with a fem-supported evaluation of impact test imprints

Bouzakis, Antonios; Skordaris, G.; Bouzakis, K.‐D.; Gökcen, Mehmet-Gökhan; Boumpakis, Apostolos; Batuk, Ahmet-Ugur; Sisman, Süleyman

doi:10.1016/j.ijrmhm.2020.105384

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…Data for the stress-strain and strain-rate curves up to strain-rates of approximately 200 s −1 for the used cemented carbide substrate were produced with the aid of the developed experimental-analytical method presented in [27]. A strain rate of 200 s −1 approximately corresponds to an impact time of 0.1 ms.…”

Section: Cemented Carbide Substratementioning

confidence: 99%

“…In this way, a wide range of milling cases can be handled, as exhibited in Section 4. Using this method, the remaining imprints on cemented carbide surfaces at various impact load durations and magnitudes were registered by a confocal microscope by Nano Focus Ltd. and evaluated via a developed FEM supported procedure explained in [27].…”

Section: Cemented Carbide Substratementioning

confidence: 99%

“…Therefore, the cemented carbide's constitutive laws over the mentioned strain become horizontal. It must be pointed out, that the described method in [27] cannot be used to attain relevant material data for PVD coatings due to their restricted thickness compared to the substrate dimensions, as explained in the next section.…”

Section: Cemented Carbide Substratementioning

confidence: 99%

“…Herein, potential coating strains induced by dynamic phenomena of the coating material itself can be considered as negligible compared to those caused by the substrate deformation. Hence, if the strain-strain-rate dependency of the substrate material is available, the related coating deformation at various strain rates can be determined based on the coating static constitutive law and the substrate relevant dynamic data [27]. In these calculations, according to the impact time, the appropriate substrate material properties illustrated in Figure 6 must be employed.…”

Section: Tialn Coating On Cemented Carbide Substratementioning

confidence: 99%

See 3 more Smart Citations

Wear Evolution on PVD Coated Cutting Tool Flank and Rake Explained Considering Stress, Strain and Strain-Rate Dependent Material Properties

Bouzakis,

Skordaris,

Bouzakis

et al. 2023

Coatings

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Impact loads developed on a tool cutting edge when milling into a workpiece material are prevailing metrics for explaining coating fatigue failure and the subsequent tool-wear evolution. For predicting related stress and strain fields in the compound coating-substrate, stress, strain, and strain-rate, dependent material properties are required. The attainment of such data is briefly described in the paper. Considering these data, the occurring strains in the cutting edge at various entry impact durations, i.e., strain rates, were calculated and compared with fatigue-critical strains. In this way, the wear phenomena causing the coating failure on the flank and rake during milling were clarified. The attained results were also correlated to corresponding ones in turning, where the dynamic loads of the cutting edge are comparably negligible. The conducted investigations showed that the fatigue-critical strains strongly diminish, when the relevant strain rates increase; thus, leading to a remarkable tool-life reduction. This happens, because the increase of the strain-rate restricts the time for the dislocations movements; thus, regions with stress concentrations occur, deteriorating the material ductility, increasing its brittleness, and diminishing the fatigue critical strains. In cutting operations, where the coating fatigue is the main wear factor, the tool-life can be predicted considering these phenomena. In the paper, relevant experimental analytical procedures are introduced.

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Section: Cemented Carbide Substratementioning

confidence: 99%

Section: Cemented Carbide Substratementioning

confidence: 99%

Section: Cemented Carbide Substratementioning

confidence: 99%

Section: Tialn Coating On Cemented Carbide Substratementioning

confidence: 99%

See 2 more Smart Citations

Wear Evolution on PVD Coated Cutting Tool Flank and Rake Explained Considering Stress, Strain and Strain-Rate Dependent Material Properties

Bouzakis,

Skordaris,

Bouzakis

et al. 2023

Coatings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Stress, strain, strain-rate dependent data for cemented carbide substrates are required for mathematically describing the developed stress and strain fields in coatings and their cemented carbide substrates during the impact test at varying force amplitude and time. Such data are available by means of an experimental analytical procedure presented in reference [6]. In this publication, a FEM-supported evaluation method was developed, for the remaining imprints on cemented carbide materials after the exercise of impact loads at various durations and amplitudes.…”

Section: Introductionmentioning

confidence: 99%

Determination of Strain Rate Depended Stress and Strain Fields in PVD Coatings on Cemented Carbide Inserts during the Repetitive Impact Test

Bouzakis

Skordaris

Bouzakis

et al. 2020

DDF

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Recently, stress, strain, strain-rate dependent curves for cemented carbide have become an established tool for evaluating the mechanical properties. In this paper, related strain-rate dependent data of a K05 insert were employed to define the developed stress and strain fields occurring in the compound coating-substrate at impact forces of various durations. In this way, the occurring maximum strains at various impact loads and times were analytically calculated. These maximum values and related fatigue endurance coating strain-rate dependent limits were consequently used to validate published coating fatigue critical impact forces associated with certain impact times.

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Determination of strain-rate and temperature dependent high-speed steel material data via Fe analysis of repetitive impact test imprints

Bouzakis

Skordaris

et al. 2021

European Journal of Materials

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Stress, strain and strain-rate cemented carbide properties determined with a fem-supported evaluation of impact test imprints

Cited by 3 publications

References 13 publications

Wear Evolution on PVD Coated Cutting Tool Flank and Rake Explained Considering Stress, Strain and Strain-Rate Dependent Material Properties

Wear Evolution on PVD Coated Cutting Tool Flank and Rake Explained Considering Stress, Strain and Strain-Rate Dependent Material Properties

Determination of Strain Rate Depended Stress and Strain Fields in PVD Coatings on Cemented Carbide Inserts during the Repetitive Impact Test

Determination of strain-rate and temperature dependent high-speed steel material data via Fe analysis of repetitive impact test imprints

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