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The Role Played By Two Parallel Free Surfaces In The Deformation Mechanism Of Nano-crystalline Metals: A Molecular Dynamics Simulation

Published online by Cambridge University Press:  14 March 2011

P. M. Derlet  and
H. Van Swygenhoven
P. M. Derlet
Affiliation:
Paul Scherrer Institute, CH-5253 Villigen PSI, Switzerland
H. Van Swygenhoven
Affiliation:
Paul Scherrer Institute, CH-5253 Villigen PSI, Switzerland
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Abstract

Former molecular dynamics computer simulations of polycrystalline Ni and Cu metals with mean grain sizes ranging between 3 and 12 nm demonstrated a change in deformation mechanism as a function of grain size: at the smallest grain sizes all deformation is accommodated in the grain boundaries. In this paper we report on the influence of the presence of two free surfaces on the deformation behaviour. The purpose of this simulation is to study which phenomena observed in in-situ tensile experiments performed in the electron microscope can be expected to be intrinsic properties of the deformation process and which phenomena are due to the presence of two free surfaces separated by a very small distance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 634: Symposium B – Structure and Mechanical Properties of Nanophase Materials-Theory & Computer Simulations vs. Experiment , 2000 , B1.4.1
Copyright
Copyright © Materials Research Society 2001

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References

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