Dynamic nanoindentation testing: is there an influence on a material’s hardness?

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Modern nanoindentation devices are capable of dynamic experimentations, which allow us to exploit instrumented hardness tests extensively. Beside the assets of recording mechanical properties continuously over displacement, there are ongoing debates whether the superimposed force alters the material’s hardness. We will show for a broad range of materials that significant hardness differences are noted between dynamic and static tests, even for large displacements. Those mainly result from a changing indentation strain-rate during the hold segment at peak load. This fact must be implicitly considered in studies using static indentation tests to guarantee comparability of obtained nanoindentation hardness values and derived quantities.
Original languageEnglish
Pages (from-to)486-493
Number of pages14
JournalMaterials Research Letters [Elektronische Ressource]
Issue number7
Publication statusPublished - 1 Jun 2017

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