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Grain boundaries can play a significant role in the mechanical response of materials. Atomistic simulations are used to investigate 79 coincidence site lattice grain boundary structures and energies in tantalum, a model body-centered cubic transition metal. Quasi-symmetric Σ3, Σ5, Σ7, Σ13, and Σ27 boundaries are observed, of which Σ3 and Σ7 also exist as traditional mirror-symmetry conserving boundary...
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