{
  "abstract": "Planar energetics are the standard descriptors of twinnability in face-centred cubic metals and the usual validation targets for interatomic potentials. Here we show that they do not determine whether deformation twins persist in nanocrystalline aluminium. Two machine-learned potentials reproducing the same zero-load slip curves and closely spaced layered energy surfaces predict, from a common separated-fault precursor under identical loading, retained twin coverage of 64\\% and 14\\%. The divergence traces to forces within distorted partial cores acting along the trailing translation that would remove an outer fault. Planar energetics do set the margin: an outer fault more than halves the incremental barrier for middle-plane shear, yet twin completion and fault removal remain separated by only 10--21 mJ m\\textsuperscript{-2}. Whether an assembled twin persists is decided instead by the orientation of local traction relative to the full-slip bisector and by the arrival order of partial-slip fronts from the grain-boundary network.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37925",
  "author_total": 5,
  "authors": [
    {
      "name": "Yue Wu"
    },
    {
      "name": "Yuan Tian"
    },
    {
      "name": "Haoyu Wan"
    },
    {
      "name": "Deng Pan"
    },
    {
      "name": "Mingwei Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bwmkdgtec01pr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37925",
  "fulltext_url": null,
  "id": "bwmkdgtec01pr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37925",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.37925",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bwmkdgtec01pr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.37925",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37925"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Planar energetics do not determine twin persistence in nanocrystalline aluminium",
  "title_text": "Planar energetics do not determine twin persistence in nanocrystalline aluminium",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/bwmkdgtec01pr",
  "venue": "arXiv",
  "versions": []
}