Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Merle B, Maier-Kiener V, Pharr GM
Zeitschrift: Acta Materialia
Verlag: PERGAMON-ELSEVIER SCIENCE LTD
Jahr der Veröffentlichung: 2017
Band: 134
Seitenbereich: 167-176
ISSN: 1359-6454


Abstract

Dynamic nanoindentation is a popular method for continuously probing the mechanical properties of a sample as a function of depth. It is shown here that special caution should be exercised when testing materials with high modulus-to-hardness ratios (E/H) at fast loading rates, as the choice of harmonic parameters can result in a significant underestimation of the contact stiffness and hence the elastic modulus. The origin of this behavior is traced back to a bias occurring during signal processing by the lock-in amplifier. The possible consequences of flawed measurements are highlighted and a practical method for detecting possible occurrence from the phase angle signal is presented. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Merle, Benoit PD Dr. habil.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Einrichtungen weiterer Autorinnen und Autoren

Montanuniversität Leoben
Texas A&M University


Zitierweisen

APA:
Merle, B., Maier-Kiener, V., & Pharr, G.M. (2017). Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation. Acta Materialia, 134, 167-176. https://dx.doi.org/10.1016/j.actamat.2017.05.036

MLA:
Merle, Benoit, Verena Maier-Kiener, and George M. Pharr. "Influence of modulus-to-hardness ratio and harmonic parameters on continuous stiffness measurement during nanoindentation." Acta Materialia 134 (2017): 167-176.

BibTeX: 

Zuletzt aktualisiert 2019-28-05 um 13:36