In situ mechanical testing of hard yet tough high entropy nitride coatings deposited on compliant steel substrates

Kuczyk M, Zawischa M, Krülle T, Vollhüter J, Zeiler S, Leonhardt M, Kaspar J, Zimmer O, Göken M, Leyens C, Zimmermann M (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Thin Solid Films Elsevier

Book Volume: 787

Article Number: 140137

DOI: 10.1016/j.tsf.2023.140137

Abstract

High entropy nitrides are an interesting material class for wear resistant coatings. Their fracture properties and toughness are of particular interest for future application in tool coatings. Therefore, in situ tensile testing and micro-cantilever experiments were performed on (AlCrTaTiZr)N, (AlCrNbSiTiV)N, (HfNbTaTiVZr)N and (AlTi)N coatings inside a scanning electron microscope. Parallel cracks form during tensile testing from which the fracture toughness was determined via a modified Hsueh and Yanaka model. For this the misfit strain between coating and substrate was treated as an unknown parameter and was fitted to the beginning part of the underlying crack density – applied strain curves. The validity of the model was evaluated by comparing the results with fracture toughness values derived via micro-cantilever bending experiments. A good fit between the data could be observed for three out of four tested coatings. The limitations of the underlying analytical model are presented and discussed. The tested high entropy nitride coatings displayed a promising combination of high hardness and fracture toughness.

Authors with CRIS profile

Jan Vollhüter Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Stefan Zeiler Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Technische Universität Dresden DE Germany (DE) Fraunhofer-Institut für Werkstoff- und Strahltechnik (IWS) / Fraunhofer Institute for Material and Beam Technology DE Germany (DE)

How to cite

APA:

Kuczyk, M., Zawischa, M., Krülle, T., Vollhüter, J., Zeiler, S., Leonhardt, M.,... Zimmermann, M. (2023). In situ mechanical testing of hard yet tough high entropy nitride coatings deposited on compliant steel substrates. Thin Solid Films, 787. https://dx.doi.org/10.1016/j.tsf.2023.140137

MLA:

Kuczyk, Martin, et al. "In situ mechanical testing of hard yet tough high entropy nitride coatings deposited on compliant steel substrates." Thin Solid Films 787 (2023).

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