微小荷重押し込み試験における硬さの荷重依存性

抄録

Bercovich tip indentation was performed with an instrumented hardness testing machine in order to measure dynamically indentation load-depth curves. The hardness of a high purity aluminum tricrystal was examined and the depth profile of indents was measured with a laser confocal scanning microscope. It was found that sink-in was formed around the indents. A constant value of hardness was obtained when the load was 100mN or larger. However, the hardness increased with decreasing the load when it was below 100mN.