A combined experimental-numerical approach for determining mechanical properties of aluminum subjects to nanoindentation

Mao Liu; Cheng Lu; Kiet Anh Tieu; Ching-Tun Peng; Charlie Kong

doi:10.1038/srep15072

A combined experimental-numerical approach for determining mechanical properties of aluminum subjects to nanoindentation

Sci Rep. 2015 Oct 14:5:15072. doi: 10.1038/srep15072.

Authors

Mao Liu¹, Cheng Lu¹, Kiet Anh Tieu¹, Ching-Tun Peng¹, Charlie Kong²

Affiliations

¹ School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
² Electron Microscope Unit, The University of New South Wales, Sydney, NSW 2052, Australia.

Abstract

A crystal plasticity finite element method (CPFEM) model has been developed to investigate the mechanical properties and micro-texture evolution of single-crystal aluminum induced by a sharp Berkovich indenter. The load-displacement curves, pile-up patterns and lattice rotation angles from simulation are consistent with the experimental results. The pile-up phenomenon and lattice rotation have been discussed based on the theory of crystal plasticity. In addition, a polycrystal tensile CPFEM model has been established to explore the relationship between indentation hardness and yield stress. The elastic constraint factor C is slightly larger than conventional value 3 due to the strain hardening.

Publication types

Research Support, Non-U.S. Gov't