Deformation twins in nanocrystalline Al Academic Article

abstract

• Due to its high stacking fault energy, no deformation twin has ever been observed in coarse-grained Al. Recent molecular dynamic (MD) simulations predicted the formation of deformation twins in nanocrystalline (nc) Al. Here, we report transmission-electron-microscopic observations of two types of twins in nc Al processed by cryogenic ball milling. They were formed via mechanisms suggested by the MD simulations. We also observed curved twin boundaries caused by partial dislocations. These results indicate that deformation mechanisms not accessible to coarse-grained Al are active in nc Al. They could be responsible for some unique mechanical properties of nc materials.

authors

• Lavernia Borrego, Enrique

published proceedings

• Applied Physics Letters

author list (cited authors)

• Liao, X. Z., Zhou, F., Lavernia, E. J., He, D. W., & Zhu, Y. T.

complete list of authors

• Liao, XZ||Zhou, F||Lavernia, EJ||He, DW||Zhu, YT

publication date

• December 2003

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

keywords

• 40 Engineering
• 4016 Materials Engineering

Digital Object Identifier (DOI)

• 10.1063/1.1633975

start page

• 5062

end page

• 5064

volume

• 83

issue

• 24

URL

• http://dx.doi.org/10.1063/1.1633975