Extending the range of constant strain rate nanoindentation testing

Merle B, Higgins WH, Pharr GM (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Materials Research Cambridge University Press

URI: https://link.springer.com/content/pdf/10.1557/jmr.2019.408.pdf

DOI: 10.1557/jmr.2019.408

Open Access Link: https://link.springer.com/content/pdf/10.1557/jmr.2019.408.pdf

Abstract

Constant strain rate nanoindentation hardness measurements at high sustained strain rates cannot be made in conventional nanoindentation testing systems using the commonly employed continuous stiffness measurement technique (CSM) because of the "plasticity error" recently reported by Merle et al. [Acta Mater.134, 167 (2017)]. To circumvent this problem, here we explore an alternative testing and analysis procedure based on quasi-static loading and an independent knowledge of the Young's modulus, which is easily obtained by standard nanoindentation testing. In theory, the method applies to any indentation strain rate, but in practice, an upper limit on the rate arises from hardware limitations in the testing system. The new methodology is developed and applied to measurements made with an iMicro nanoindenter (KLA, Inc.), in which strain rates up to 100 s-1 were successfully achieved. The origins of the hardware limitations are documented and discussed.

Authors with CRIS profile

Benoit Merle Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Related research project(s)

SPP 2074 Fundamental multiscale investigations for improved calculation of the service life of solid lubricated rolling bearings April 1, 2019 - March 31, 2022

Involved external institutions

Texas A&M University US United States (USA) (US)

How to cite

APA:

Merle, B., Higgins, W.H., & Pharr, G.M. (2020). Extending the range of constant strain rate nanoindentation testing. Journal of Materials Research. https://dx.doi.org/10.1557/jmr.2019.408

MLA:

Merle, Benoit, Wesley H. Higgins, and George M. Pharr. "Extending the range of constant strain rate nanoindentation testing." Journal of Materials Research (2020).

BibTeX: Download