A Method for Studying the Nano-Scale Stress-Strain Response of a Material by Nanoindentation

作者：Fujisawa Naoki; Ogura Tomo; Hirose Akio

来源：Materials Transactions, 2016, 57(6): 1006-1009.

DOI：10.2320/matertrans.M2015459

• nanoindentation
• aluminum alloys
• stress-strain curve
• elastic behavior
• yield behavior

A method was developed using nanoindentation with a spherical indenter to probe the elastic stress-strain response of a given material quantitatively at the nanoscale. To account for the fact that the realistic indenter tip shape is not strictly spherical down at the nanoscale, this method comprises a procedure to calibrate the indentation strain based on the elastic indentation stress-strain data of a reference sample with known elastic modulus. One of the advantages of the nanoindentation-based approach is that it also enables qualitative assessment of the subsequent elastic-to-plastic transition and post yield behavior of the material. An aluminum alloy tested by the present method was shown capable of exhibiting a significantly greater strength to resist initial plastic deformation than in the case of tensile testing of bulk samples.

• 出版日期2016