Dislocation Cross-Slip in Nanocrystalline fcc Metals

E. Bitzek, C. Brandl, P. M. Derlet, and H. Van Swygenhoven
Phys. Rev. Lett. 100, 235501 – Published 11 June 2008
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Abstract

Constant strain rate molecular dynamics simulations of nanocrystalline Al demonstrate that a significant amount of dislocations that have nucleated at the grain boundaries, exhibit cross-slip via the Fleischer mechanism as they propagate through the grain. The grain boundary structure is found to strongly influence when and where cross-slip occurs, allowing the dislocation to avoid local stress concentrations that otherwise can act as strong pinning sites for dislocation propagation.

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  • Received 21 February 2008

DOI:https://doi.org/10.1103/PhysRevLett.100.235501

©2008 American Physical Society

Authors & Affiliations

E. Bitzek, C. Brandl, P. M. Derlet, and H. Van Swygenhoven

  • Materials Science & Simulation, ASQ/NUM, Paul Scherrer Insitut, CH-5232 Villigen PSI, Switzerland

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Issue

Vol. 100, Iss. 23 — 13 June 2008

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