Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 9 April 2004:
Vol. 304. no. 5668, pp. 273 - 276
DOI: 10.1126/science.1095071
Prev | Table of Contents | Next

Reports

Plastic Deformation with Reversible Peak Broadening in Nanocrystalline Nickel

Zeljka Budrovic, Helena Van Swygenhoven, Peter M. Derlet, Steven Van Petegem, Bernd Schmitt

Plastic deformation in coarse-grained metals is governed by dislocation-mediated processes. These processes lead to the accumulation of a residual dislocation network, producing inhomogeneous strain and an irreversible broadening of the Bragg peaks in x-ray diffraction. We show that during plastic deformation of electrodeposited nanocrystalline nickel, the peak broadening is reversible upon unloading; hence, the deformation process does not build up a residual dislocation network. The results were obtained during in situ peak profile analysis using the Swiss Light Source. This in situ technique, based on well-known peak profile analysis methods, can be used to address the relationship between microstructure and mechanical properties in nanostructured materials.

Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Plastic Deformation Recovery in Freestanding Nanocrystalline Aluminum and Gold Thin Films.
J. Rajagopalan, J. H. Han, and M. T. A. Saif (2007)
Science 315, 1831-1834
   Abstract »    Full Text »    PDF »
Ultrahigh Strength in Nanocrystalline Materials Under Shock Loading.
E. M. Bringa, A. Caro, Y. Wang, M. Victoria, J. M. McNaney, B. A. Remington, R. F. Smith, B. R. Torralva, and H. Van Swygenhoven (2005)
Science 309, 1838-1841
   Abstract »    Full Text »    PDF »
Grain Boundary-Mediated Plasticity in Nanocrystalline Nickel.
Z. Shan, E. A. Stach, J. M. K. Wiezorek, J. A. Knapp, D. M. Follstaedt, and S. X. Mao (2004)
Science 305, 654-657
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)