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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:608

Article

Demiral, Murat¹  Roy, Anish²  El Sayed, Tamer¹  Silberschmidt, Vadim V.² 

[1] King Abdullah Univ Sci & Technol KAUST, Div Phys Sci & Engn, Computat Solid Mech Lab, Thuwal, Saudi Arabia

[2] Univ Loughborough, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, England

关键词: Lattice rotation;    Pile-up;    Indentation;    Strain-gradient crystal plasticity;    Ti alloy;   

DOI  :  10.1016/j.msea.2014.04.033

来源: Elsevier

【 摘 要 】

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. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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