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.

现代的纳米压痕设备能够进行动态实验，这使我们能够广泛利用仪器化的硬度测试。除了在位移上连续记录机械性能的资产外，正在进行的辩论还涉及叠加力是否会改变材料的硬度。我们将证明，对于各种材料，即使在大位移情况下，在动态和静态测试之间也会发现明显的硬度差异。这些主要是由于在峰值载荷下，在保持段期间压痕应变率发生了变化。在使用静态压痕测试的研究中必须隐含考虑这一事实，以确保获得的纳米压痕硬度值和导出量的可比性。