Next Article in Journal
Design of Crosslinked Hydrogels Comprising Poly(Vinylphosphonic Acid) and Bis[2-(Methacryloyloxy)Ethyl] Phosphate as an Efficient Adsorbent for Wastewater Dye Removal
Previous Article in Journal
Influence of Dopant Nature on Biological Properties of ZnO Thin-Film Coatings on Ti Alloy Substrate
Previous Article in Special Issue
Revealing Nanoindentation Size-Dependent Creep Behavior in a La-Based Metallic Glassy Film
Open AccessArticle

Round Robin into Best Practices for the Determination of Indentation Size Effects

1
European Commission, DG-Joint Research Centre, Westerduinweg 3, 1755 LE Petten, The Netherlands
2
National Centre for Nuclear Research, A. Sołtana str. 7, 05-400 Otwock–Świerk, Poland
3
Laboratory for Nuclear Materials, Paul Scherrer Institute, 5232 Villigen, Switzerland
4
Aalto University, Department of Chemistry and Materials Science, Aalto University, Kemistintie 1, 02150 Espoo, Finland
5
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, (CIEMAT), Avda. Complutense 40, 28040 Madrid, Spain
6
Centrum Vyzkumu Rez, Hlavní 130, 250 68 Husinec-Řež, Czech Republic
7
Institute of Nuclear Materials Science, SCK-CEN, Belgian Nuclear Research Centre, Boeretang 200, Mol, 2400, Belgium
8
Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
9
Coventry University, Institute for Future Transport and Cities, Coventry University, Coventry CV1 5FB, UK
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(1), 130; https://doi.org/10.3390/nano10010130
Received: 29 November 2019 / Revised: 3 January 2020 / Accepted: 7 January 2020 / Published: 10 January 2020
(This article belongs to the Special Issue Nano Mechanical Testing of Materials and Devices)
The paper presents a statistical study of nanoindentation results obtained in seven European laboratories which have joined a round robin exercise to assess methods for the evaluation of indentation size effects. The study focuses on the characterization of ferritic/martensitic steels T91 and Eurofer97, envisaged as structural materials for nuclear fission and fusion applications, respectively. Depth-controlled single cycle measurements at various final indentation depths, force-controlled single cycle and force-controlled progressive multi-cycle measurements using Berkovich indenters at room temperature have been combined to calculate the indentation hardness and the elastic modulus as a function of depth applying the Oliver and Pharr method. Intra- and inter-laboratory variabilities have been evaluated. Elastic modulus corrections have been applied to the hardness data to compensate for materials related systematic errors, like pile-up behaviour, which is not accounted for by the Oliver and Pharr theory, and other sources of instrumental or methodological bias. The correction modifies the statistical hardness profiles and allows determining more reliable indentation size effects.
Keywords: Nanoindentation; nano-mechanical; small scale testing; pile-up; elastic modulus correction; indentation size effect; ferritic/martensitic steel Nanoindentation; nano-mechanical; small scale testing; pile-up; elastic modulus correction; indentation size effect; ferritic/martensitic steel
MDPI and ACS Style

Ruiz-Moreno, A.; Hähner, P.; Kurpaska, L.; Jagielski, J.; Spätig, P.; Trebala, M.; Hannula, S.-P.; Merino, S.; de Diego, G.; Namburi, H.; Libera, O.; Terentyev, D.; Khvan, T.; Heintze, C.; Jennett, N. Round Robin into Best Practices for the Determination of Indentation Size Effects. Nanomaterials 2020, 10, 130.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop