Anisotropy of nanoindentation in copper single crystals under different orientations

Abstract

The anisotropy of nanoindentation in copper single crystals is studied through experiments and simulations. Nanoindentation tests with different orientations were carried out, and the depth was 20nm-500nm. Simulations were carried out using crystal plasticity finite element method. The results show that sample with different orientations present anisotropic with increase of indentation depth. The accumulated plastic strains of the samples with different orientations are different due to the different angle between the loading direct and the normal to the slip surface. The cumulative plastic strain of oriented samples is the smallest, and orientation is the largest. The amount of slip coefficients initiated simultaneously for samples with different orientations is responsible for the differences in nanoindentation properties.

KEYWORDS:

• Nanoindentation
• single crystalline copper
• CPFEM
• slip system
• anisotropy

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by Guangdong Major Project of Basic and Applied Basic Research [grant number 2019B03032011]; Guangdong Introducing Innovative and Entrepreneurial Teams [grant number 2016ZT06G025]; National Natural Science Foundation of China (Grant number 52275144).