| Abstract Scope |
Nanoindentation is a popular technique for investigating nanostructured materials. Yet, constant strain rate nanoindentation is usually limited to strain rates ≤ 0.1/s, which has long prevented investigating extreme conditions like those found during a shock or a collision.
Despite recent advances in fast electronics and high-speed sensors [1], the typical limitation to 0.1/s actually stems from the plasticity error of the continuous stiffness measurements (CSM). It was recently overcome with the MHP method [2], which discards the need for a measurement of the contact stiffness, enabling measurements of hardness at higher strain rates. In this presentation, we will compare the different experimental approaches that we have developed in parallel with a force controlled and a displacement controlled system in order to achieve the highest strain rates.
[1] https://doi.org/10.1557/s43577-025-00918-7
[2] https://doi.org/10.1557/jmr.2019.408 |