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

• Published in: Diffusion and defect data. Solid state data. Pt. A, Defect and diffusion forum Vol. 404; pp. 45 - 52
• Main Authors: Serbes, Sefer Arda, Sisman, Süleyman, Boumpakis, Apostolos, Bouzakis, Konstantinos Dionysios, Bouzakis, Antonios, Skordaris, G., Batuk, Ahmet-Ugur, Gökcen, Mehmet Gökhan
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 20.10.2020
• Subjects: Carbide tools; Cemented carbides; Impact loads; Impact tests; Inserts; Mechanical properties; Strain rate; Substrates; Carbide; Coating; Dynamic Loads
• ISSN: 1012-0386; 1662-9507; 1662-9507
• DOI: 10.4028/www.scientific.net/DDF.404.45

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.