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BRIEF NOTES

On Source-Limited Dislocations in Nanoindentation

[+] Author and Article Information
M. X. Shi

Department of Theoretical and Applied Mechanics, University of Illinois at Urbana-Champaign, Urbana, IL 61801

Y. Huang

Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 e-mail: huang9@uiuc.edu

M. Li

Alcoa Technical Center, Alcoa Center, PA 15069

K. C. Hwang

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, P.R. China

J. Appl. Mech 71(3), 433-435 (Jun 22, 2004) (3 pages) doi:10.1115/1.1751185 History: Received August 12, 2002; Revised October 25, 2003; Online June 22, 2004
Copyright © 2004 by ASME
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References

Nix,  W. D., 1997, “Elastic and Plastic Properties of Thin Films on Substrates: Nanoindentation Techniques,” Mater. Sci. Eng., A, 234, pp. 37–44.
Gouldstone,  A., Koh,  H.-J., Zeng,  K.-Y., Giannakopoulos,  A. E., and Suresh,  S., 2000, “Discrete and Continuous Deformation During Nanoindentation of Thin Films,” Acta Mater., 48, pp. 2277–2295.
Zielinski,  W., Huang,  H., Venkataraman,  S., and Gerberich,  W. W., 1995, “Dislocation Distribution Under a Microindentation Into an Iron-Silicon Single Crystal,” Philos. Mag. A, 72, pp. 1221–1237.
Gerberich,  W. W., Nelson,  J. C., Lilleodden,  E. T., Anderson,  P., and Wyrobek,  J. T., 1996, “Indentation Induced Dislocation Nucleation: The Initial Yield Point,” Acta Mater., 44, pp. 3585–3598.
Tadmor,  E. B., Miller,  R., and Phillips,  R., 1999, “Nanoindentation and Incipient Plasticity,” J. Mater. Res., 14, pp. 2233–2250.
Shi, M., Huang, Y., and Gao, H., 2003, “The J-Integral and Geometrically Necessary Dislocations in Nonuniform Plastic Deformation,” Int. J. Plasticity, in press.
Needleman,  A., and van der Giessen,  E., 2001, “Discrete Dislocation and Continuum Descriptions of Plastic Flow,” Mater. Sci. Eng., A, 309, pp. 1–13.
van der Giessen,  E., Deshpande,  V. S., Cleveringa,  H. H. M., and Needleman,  A., 2001, “Discrete Dislocation Plasticity and Crack Tip Fields in Single Crystals,” J. Mech. Phys. Solids, 49, pp. 2133–2153.
Hills, D. A., and Nowell, D., 1994, Mechanics of Fretting Fatigure, Kluwer Academic Publishers, Boston.

Figures

Grahic Jump Location
Random distribution of dislocation sources (open circles) and obstacles (solid circles) on slip planes (dashed lines). There are 18 slip planes in the 2 μm×2 μm region, with 3 dislocation sources and 11 obstacles on each slip plane. The pressure is applied over a region of 0.4 μm on the top surface.
Grahic Jump Location
The applied pressure (normalized by the Young’s modulus) versus the indentation depth for the 2 μm×2 μm region in Fig. 1 with 6, 18, 53, and 160 slip planes

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