{
  "abstract": "Grain boundaries (GBs) strongly affect the mechanical response of polycrystalline materials, yet most atomistic studies have focused on coincidence site lattice (CSL) boundaries. Motivated by in situ atomic-resolution observations, we investigate step-free sliding along asymmetric non-CSL tilt GBs in face-centered cubic (FCC) metals using atomistic modeling. In these incommensurate GBs, a dense array of non-glissile primary misfit dislocations accommodates local interfacial mismatch, whereas a more widely spaced array of glissile secondary misfit dislocations accommodates residual mismatch. Uniform-sliding calculations reveal two distinct quantities: the minimum GB structural periodicity λ, defined by the repeating arrangement of primary GB misfit dislocations, and the slip vector b, corresponding to the minimum displacement-shift-complete translation that restores an equivalent GB structure. Nonuniform sliding proceeds through the glide of secondary GB misfit dislocations, which carry b and transform successive boundary segments between crystallographically equivalent translation states. The characteristic spacing between secondary misfit dislocations defines a longer periodicity Λ. For the representative {331}/{111} GB, each secondary misfit dislocation glides through a thermally activated two-step kink-pair mechanism below the athermal stress, advancing by one structural period λ. These results establish a unified crystallographic and dislocation-based framework for understanding stress-driven sliding in structurally complex asymmetric GBs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.14673",
  "author_total": 6,
  "authors": [
    {
      "name": "Kunqing Ding"
    },
    {
      "name": "Yazhuo Liu"
    },
    {
      "name": "Yin Zhang"
    },
    {
      "name": "Lihua Wang"
    },
    {
      "name": "Xiaodong Han"
    },
    {
      "name": "Ting Zhu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/37wzbj7g1k6hf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.14673",
  "fulltext_url": null,
  "id": "37wzbj7g1k6hf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.14673",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2505|Microstructure and mechanical properties"
    ]
  ],
  "openalex": "W7213284552",
  "pdf_url": "https://arxiv.org/pdf/2609.14673",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/37wzbj7g1k6hf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2609.14673",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.14673"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Misfit-dislocation hierarchy governs sliding of asymmetric non-CSL grain boundaries",
  "title_text": "Misfit-dislocation hierarchy governs sliding of asymmetric non-CSL grain boundaries",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/37wzbj7g1k6hf",
  "venue": "arXiv",
  "versions": []
}