Influence of strain gradients on lattice rotation in nano-indentation experiments: A numerical study

Demiral, Murat; Roy, Anish; El Sayed, Tamer S.; Silberschmidt, Vadim V.

Influence of strain gradients on lattice rotation in nano-indentation experiments: A numerical study

Type

Article

Authors

Demiral, Murat
Roy, Anish
El Sayed, Tamer S.
Silberschmidt, Vadim V.

KAUST Department

Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Physical Science and Engineering (PSE) Division

Date

2014-07

Abstract

In this paper the texture evolution in nano-indentation experiments was investigated numerically. To achieve this, a three-dimensional implicit finite-element model incorporating a strain-gradient crystal-plasticity theory was developed to represent accurately the deformation of a body-centred cubic metallic material. A hardening model was implemented to account for strain hardening of the involved slip systems. The surface topography around indents in different crystallographic orientations was compared to corresponding lattice rotations. The influence of strain gradients on the prediction of lattice rotations in nano-indentation was critically assessed. © 2014 Elsevier B.V..

Citation

Demiral, M., Roy, A., El Sayed, T., & Silberschmidt, V. V. (2014). Influence of strain gradients on lattice rotation in nano-indentation experiments: A numerical study. Materials Science and Engineering: A, 608, 73–81. doi:10.1016/j.msea.2014.04.033

Acknowledgements

The research leading to these results received funding from the European Union Seventh Framework Programme(FP7/2007-2013) under Grant agreement PITN-GA-2008-211536, project MaMiNa and KAUST baseline fund. MD thanks Prof. Fionn Dunne for useful discussions.