Slip-dominated structural transitions - Institut Galilée Université Paris 13
Pré-Publication, Document De Travail Année : 2024

Slip-dominated structural transitions

Résumé

We use molecular dynamics to show that plastic slip is a crucial component of the transformation mechanism of a square-to-triangular structural transition. The latter is a stylized analog of many other reconstructive phase transitions. To justify our conclusions we use a novel atomistically-informed mesoscopic representation of the field of lattice distortions in molecular dynamics simulations. Our approach reveals a hidden alternating slip distribution behind the seemingly homogeneous product phase which points to the fact that lattice invariant shears play a central role in this class of phase transformations. While the underlying pattern of anti-parallel displacements may also be interpreted as microscopic shuffling, its precise crystallographic nature strongly suggests the plasticity-centered interpretation.
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Dates et versions

hal-04696850 , version 1 (13-09-2024)

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Domaine public

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Kanka Ghosh, Oguz Umut Salman, Sylvain Queyreau, Lev Truskinovsky. Slip-dominated structural transitions. 2024. ⟨hal-04696850⟩
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