{
  "abstract": "In this study, a functional truncated-conical module made of the Fe57Mn27Si11Cr5 (at.%) shape memory alloy was investigated. The module was obtained by the severe plastic deformation process, High-Speed High-Pressure Torsion (HSHPT). It was processed in a single step, with the logarithmic strain estimated at ε = 1.10, and the correlation among the microstructure, structural state, and functional behavior was analyzed by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM), and mechanical testing. HSHPT processing replaced the initial dendritic structure with a severely deformed and refined microstructure characterized by deformation bands, fibrous regions, and lamellar features associated with ε-martensite. XRD analysis revealed that γ-FCC austenite remained the dominant crystalline phase and that the γ(111) reflection shifted from 2θ = 43.47° to 43.12°. AFM analysis, performed over an area of 1600 µm2, revealed an arithmetic mean roughness (Ra) of 14.59 nm and a root mean square roughness (Rq) of 19.77 nm. Segmentation of the scanned area using the Flooding procedure revealed a mean Equivalent Circular Diameter (ECD) of 253.39 nm. Mechanical tests demonstrated stable functional behavior and progressive cyclic stabilization. The module exhibited a superelastic-like load–displacement response, accompanied by an increase in energy storage efficiency and a decrease in dissipated energy during repeated compression cycles.",
  "abstract_shown": true,
  "affiliations": [
    "Interdisciplinary Research Centre in the Field of Eco-Nano Technology and Advance Materials CC-ITI, Faculty of Engineering, “Dunărea de Jos” University of Galati, 47 Domneasca Street, 800008 Galati, Romania",
    "Faculty of Materials Science and Engineering, “Gheorghe Asachi” Technical University of Iași, Bd. D. Mangeron 41, 700050 Iași, Romania",
    "National Institute for Research and Development in Microtechnologies, 023573 Bucharest, Romania"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Cristian Stefanescu",
      "orcid": "0000-0001-7103-306X"
    },
    {
      "affs": [
        0
      ],
      "name": "Carmela Gurau",
      "orcid": "0000-0003-4116-0070"
    },
    {
      "affs": [
        0
      ],
      "name": "Daniela-Laura Buruiana",
      "orcid": "0000-0001-7787-8776"
    },
    {
      "affs": [
        1
      ],
      "name": "Radu Ioachim Comăneci"
    },
    {
      "affs": [
        2
      ],
      "name": "Cosmin Romanitan",
      "orcid": "0000-0002-5615-6624"
    },
    {
      "affs": [
        0
      ],
      "name": "Gheorghe Gurau",
      "orcid": "0000-0001-8512-080X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6ec0jyg01k1h9.bib",
  "cited_by": 0,
  "doi": "10.3390/nano16211337",
  "fulltext_url": null,
  "id": "6ec0jyg01k1h9",
  "issns": [
    "2079-4991"
  ],
  "landing_url": "https://www.mdpi.com/2079-4991/16/21/1337",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Shape Memory Alloy Transformations"
    ]
  ],
  "openalex": "W7223177716",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/6ec0jyg01k1h9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:45Z",
      "native_id": "10.3390/nano16211337",
      "source": "crossref",
      "url": "https://www.mdpi.com/2079-4991/16/21/1337"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Shape Memory Alloy Transformations",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Microstructural Evolution and Functional Response of a FeMnSiCr Shape Memory Alloy Module Processed by High-Speed High-Pressure Torsion",
  "title_text": "Microstructural Evolution and Functional Response of a FeMnSiCr Shape Memory Alloy Module Processed by High-Speed High-Pressure Torsion",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:45Z",
  "url": "https://research.draconitic.com/paper/6ec0jyg01k1h9",
  "venue": "Nanomaterials",
  "versions": []
}