Paper Titles
Mechanisms of Formation of Submicron Grain Structures by Severe Deformation
p.159
Global and Local Structural Evolution during Deformation and Annealing of FCC Metals
p.169
Multiple Forging Textures and Microstructures in Al Alloys
p.181
The Dislocation Patterns in Deformed Metals: Dislocation Densities, Distributions and Related Misorientations
p.193
Recent Progress in the 3D Experimentation and Simulation of Nanoindents
p.199
Evolution of the Deformed Substructure Obtained by Cold-Rolling in IF Steel
p.205
Observations of Strain Induced Precipitation during the Thermomechanical Processing of AA6111 Alloy
p.211
Deformation Mechanisms in High-Al Bearing High-Mn TWIP Steels in Hot Compression and in Tension at Low Temperatures
p.217
An Analysis of Deformation Microstructure and Subsequent Recrystallisation in Hot Deformed Aluminium Alloy AA5052 Using Forward and Reverse Torsion
p.223

Recent Progress in the 3D Experimentation and Simulation of Nanoindents

Article Preview

Abstract:

This work studies the rotations of a (111) Cu single crystal due to the application of a conical nanoindent. With the aid of a joint high-resolution field emission SEM-EBSD set-up coupled with serial sectioning in a focused ion beam (FIB) system in the form of a cross-beam 3D crystal orientation microscope (3D EBSD) a 3D rotation map underneath the indent could be extracted. When analyzing the rotation directions in the cross section planes (11-2) perpendicular to the (111) surface plane below the indenter tip we observe multiple transition regimes with steep orientation gradients and changes in rotation direction. A phenomenological and a physically-based 3D elastic-viscoplastic crystal plasticity model are implemented in two finite element simulations adopting the geometry and boundary conditions of the experiment. While the phenomenological model predicts the general rotation trend it fails to describe the fine details of the rotation patterning with the frequent changes in sign observed in the experiment. The physically-based model, which is a dislocation density based constitutive model, succeeded to precisely predict the crystal rotation map compared with the experiment. Both simulations over-emphasize the magnitude of the rotation field near the indenter relative to that measured directly below the indenter tip. However, out of the two models the physically-based model reveals better crystal rotation angles

You might also be interested in these eBooks
Fundamentals of Deformation and Annealing View Preview

Info:

Periodical:

Materials Science Forum (Volume 550)

Pages:

199-204

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.550.199

Citation:

Cite this paper

Online since:

July 2007

Authors:

N. Zaafarani, Franz Roters, Dierk Raabe

Keywords:

3D-EBSD, Copper (Cu), Crystal Plasticity, Dislocation Density, FIB, Finite Element (FE) Simulation, Focused Ion Beam (FIB), Lattice Rotation, Nanoindentation, Single Crystal, Texture

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] W. Yang, B.C. Larson, G.M. Pharr, G.E. Ice, J.D. Budai, J.Z. Tischler and W. Liu : Journal of Materials Research, Vol. 19 (2004), p.66.

Google Scholar

[2] Y. Wang, D. Raabe, C. Klüber, F. Roters : Acta Materialia Vol. 52 (2004), p.2229.

Google Scholar

[3] Y. Liu, B. Wang, M. Yoshino, S. Roy, H. Lu and R. Komanduri : Journal of the Mechanics and Physics of solids Vol. 53 (2005), p.2718.

Google Scholar

[4] K.K. Mclaughlin, N.A. Stelmashenko, S.J. Lloyd, L.J. Vandeperre and W.J. Clegg : Mater. Res. Soc. Symp. Proc. Vol. 841 (2005), p.3.

Google Scholar

[5] D. Kiener, R. Pippan, C. Motz, H. Kreuzer : Acta Materialia Vol. 54 (2006), p.2801.

DOI: 10.1016/j.actamat.2006.02.024

Google Scholar

[6] N. Zaafarani, D. Raabe, R.N. Singh, F. Roters and S. Zaefferer : Acta Materialia Vol. 54 (2006), p.1863.

Google Scholar

[7] S.R. Kalidindi, C.A. Bronkhorst and L. Anand : Journal of the Mechanics and Physics of solids Vol. 40 (1992), p.537.

Google Scholar

[8] A. Ma, F. Roters : Acta Materialia Vol. 52 (2004).

Google Scholar

[9] A. Ma, F. Roters and D. Raabe : Acta Materialia Vol. 54 (2006), p.2169.

Google Scholar

[10] MSC. MARC user's manual 2005, User Subroutines and Special Routines, Vol. D.

Google Scholar