Dislocation mediated twin boundary faceting in β-Sn
Abstract
Grain boundaries (GBs), including twin boundaries (TBs), play a critical role in plastic deformation by interacting with dislocations. The deformation and strengthening mechanisms in β-Sn are of significant interest because Sn-based alloys are widely used as solder materials. Recent experiments have shown deformation-induced faceting in β-Sn arising from twin-dislocation interactions. Using molecular dynamics (MD) simulations informed by a recently developed machine-learned interatomic potential (MLIP), we demonstrate a ⟨ c⟩ dislocation-absorption mediated faceting reaction along (301) TBs in β-Sn in which facet length grows with the number of absorbed dislocations. We show that the predicted facet length is consistent with isotropic elasticity theory only when the disclination character of the asymmetric twin facet is taken into account. We discuss analogies to faceting reactions in other low symmetry metals and hypothesize that the ubiquity of (301) twins in β-Sn stems from their ability to grow rapidly through a forest of dislocation obstacles.
Related
- Investigating twin boundary-dislocation interaction in MgY using quasi in-situ nanoindentation and electron channeling contrast imaging
- Implications of an analysis of the shear transformation of a zone of an oblate spheroid for dislocation theory, grain boundary sliding and superplasticity
- Selective faceting induced by Hexagonal Boron Nitride on curved Platinum substrate
- Stable Long-Range Charging and Boundary-Mediated Thresholds in a Waveguide Quantum Battery
- Disordered vs. Short-Range-Ordered Complexions: Consequences for Grain-Boundary-Mediated Plasticity in Nanocrystalline Al-Ni Alloys
BibTeX
@misc{israel2026dislocation,
title = {{Dislocation mediated twin boundary faceting in $β$-Sn}},
author = {John Israel and Ian Chesser and Khanh Dang and Vinamra Agrawal},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.13714},
eprint = {2610.13714},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.13714},
}
RIS
TY - UNPB
TI - Dislocation mediated twin boundary faceting in β-Sn
AU - John Israel
AU - Ian Chesser
AU - Khanh Dang
AU - Vinamra Agrawal
PY - 2026
DA - 2026/10/09
PB - arXiv
DO - 10.48550/arxiv.2610.13714
UR - https://arxiv.org/abs/2610.13714
AB - Grain boundaries (GBs), including twin boundaries (TBs), play a critical role in plastic deformation by interacting with dislocations. The deformation and strengthening mechanisms in β-Sn are of significant interest because Sn-based alloys are widely used as solder materials. Recent experiments have shown deformation-induced faceting in β-Sn arising from twin-dislocation interactions. Using molecular dynamics (MD) simulations informed by a recently developed machine-learned interatomic potential (MLIP), we demonstrate a ⟨ c⟩ dislocation-absorption mediated faceting reaction along (301) TBs in β-Sn in which facet length grows with the number of absorbed dislocations. We show that the predicted facet length is consistent with isotropic elasticity theory only when the disclination character of the asymmetric twin facet is taken into account. We discuss analogies to faceting reactions in other low symmetry metals and hypothesize that the ubiquity of (301) twins in β-Sn stems from their ability to grow rapidly through a forest of dislocation obstacles.
ER -