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Updated: Jun 21, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
Atomic shuffling dominated mechanism for deformation twinning in magnesium
1Department of Materials Science and Engineering and Center for Advanced Metallic and Ceramic Systems, Johns Hopkins University, Baltimore, Maryland 21218, USA. bli@jhu.edu
Abstract:
Deformation twinning is often mediated by partial dislocation activities at the twin boundary. Using molecular dynamics simulations, we have uncovered a new mechanism for the most commonly observed {1012}<101 1> deformation twinning in Mg and other hexagonal close-packed metals. Here the twin growth involves no definable dislocations at the twin boundary, and the twin orientational relationship can be established by local atomic shuffling, directly constructing the twin lattice from the parent lattice.
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