Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

Author:

Schmahl Merle1,Müller Cecilia1,Meinke Reinhard1,Alves Alcantara Erika G.1,Hangen Ude D.2,Fleck Claudia1ORCID

Affiliation:

1. Fachgebiet Werkstofftechnik/Chair of Materials Science & Engineering Institute of Materials Science and Technology Faculty III Process Sciences Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany

2. Bruker NanoSurfaces and Metrology Bruker Nano GmbH Dennewartstrasse 200 52068 Aachen Germany

Abstract

Cyclic nanoindentation allows characterizing the influence of single phases and their interactions on fatigue mechanisms. Herein, a method for high cycle fatigue testing by nanoindentation is presented. By combining high‐ and low‐frequency indentation modes, high cycle numbers are achieved while obtaining sufficient data points to reconstruct force–displacement hysteresis loops. A challenge is the stochastic course of thermal drift which is addressed by measuring drift rate in regular low‐force holding segments. Drift rates are used to correct the displacement values, yielding reproducible cyclic deformation data as it is shown for two very different materials, a ductile metal and a brittle ceramic.

Funder

Deutsche Forschungsgemeinschaft

Publisher

Wiley

Subject

Condensed Matter Physics,General Materials Science

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