Establishing a simple and reliable method of measuring ductility of fine metal wire

Shiori Gondo, Shinsuke Suzuki, Motoo Asakawa, Kosuke Takemoto, Kenichi Tashima, Satoshi Kajino

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Background: Measurement of the ductility like elongation and reduction of area of the fine metal wire is important because of the progress for the weight reduction and miniaturization of various products. This study established a simple and reliable method of measuring the ductility of a fine metal wire. Methods: Tensile and loading-unloading tests were performed with applying initial load to high-carbon steel wire (diameters of 0.06–0.296 mm) through capstan-type grippers for non-metal fiber. The wire fastened with the grippers was separated into three parts: the fastened part, the contact part, and the non-contact part. Scanning electron microscope (SEM) images were used to measure the wire radius under uniform deformation and agreed well with the radius calculated using the radius before tensile testing and uniform elongation. Results: The following conditions were clarified: non-slippage at the fastening between gripper and wire, a longitudinally uniform elongation, negligible cross-head bending, and the stroke calculation accuracy of elongated length by the initial load. Thus, uniform elongations were calculated as the ratio of the stroke at 0 N subtracted from the stroke at maximum tensile load to the additional initial chuck distance and the stroke at 0 N. The maximum error of uniform elongation was 0.21%. The reduction of area could be calculated by using the radius at uniform deformation portion, while the radius at the most constricted point was measured using SEM image of one fractured piece and uniform elongation. The measurement error of reduction of area was 1.9%. Conclusion: This measurement method can be applied to other metal wires less than 1 mm in diameter.

    Original languageEnglish
    Article number5
    JournalInternational Journal of Mechanical and Materials Engineering
    Volume13
    Issue number1
    DOIs
    Publication statusPublished - 2018 Dec 1

    Fingerprint

    Ductility
    Metals
    Elongation
    Wire
    Grippers
    Electron microscopes
    Chucks
    Scanning
    Tensile testing
    Unloading
    Measurement errors
    Carbon steel
    Fibers

    Keywords

    • Elongation
    • Fine metal wire
    • Reduction of area
    • Tensile testing

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Establishing a simple and reliable method of measuring ductility of fine metal wire. / Gondo, Shiori; Suzuki, Shinsuke; Asakawa, Motoo; Takemoto, Kosuke; Tashima, Kenichi; Kajino, Satoshi.

    In: International Journal of Mechanical and Materials Engineering, Vol. 13, No. 1, 5, 01.12.2018.

    Research output: Contribution to journalArticle

    Gondo, Shiori ; Suzuki, Shinsuke ; Asakawa, Motoo ; Takemoto, Kosuke ; Tashima, Kenichi ; Kajino, Satoshi. / Establishing a simple and reliable method of measuring ductility of fine metal wire. In: International Journal of Mechanical and Materials Engineering. 2018 ; Vol. 13, No. 1.
    @article{9c9a40e134a64f778ba0a0d397c7b22e,
    title = "Establishing a simple and reliable method of measuring ductility of fine metal wire",
    abstract = "Background: Measurement of the ductility like elongation and reduction of area of the fine metal wire is important because of the progress for the weight reduction and miniaturization of various products. This study established a simple and reliable method of measuring the ductility of a fine metal wire. Methods: Tensile and loading-unloading tests were performed with applying initial load to high-carbon steel wire (diameters of 0.06–0.296 mm) through capstan-type grippers for non-metal fiber. The wire fastened with the grippers was separated into three parts: the fastened part, the contact part, and the non-contact part. Scanning electron microscope (SEM) images were used to measure the wire radius under uniform deformation and agreed well with the radius calculated using the radius before tensile testing and uniform elongation. Results: The following conditions were clarified: non-slippage at the fastening between gripper and wire, a longitudinally uniform elongation, negligible cross-head bending, and the stroke calculation accuracy of elongated length by the initial load. Thus, uniform elongations were calculated as the ratio of the stroke at 0 N subtracted from the stroke at maximum tensile load to the additional initial chuck distance and the stroke at 0 N. The maximum error of uniform elongation was 0.21{\%}. The reduction of area could be calculated by using the radius at uniform deformation portion, while the radius at the most constricted point was measured using SEM image of one fractured piece and uniform elongation. The measurement error of reduction of area was 1.9{\%}. Conclusion: This measurement method can be applied to other metal wires less than 1 mm in diameter.",
    keywords = "Elongation, Fine metal wire, Reduction of area, Tensile testing",
    author = "Shiori Gondo and Shinsuke Suzuki and Motoo Asakawa and Kosuke Takemoto and Kenichi Tashima and Satoshi Kajino",
    year = "2018",
    month = "12",
    day = "1",
    doi = "10.1186/s40712-018-0091-0",
    language = "English",
    volume = "13",
    journal = "International Journal of Mechanical and Materials Engineering",
    issn = "1823-0334",
    publisher = "University of Malaya",
    number = "1",

    }

    TY - JOUR

    T1 - Establishing a simple and reliable method of measuring ductility of fine metal wire

    AU - Gondo, Shiori

    AU - Suzuki, Shinsuke

    AU - Asakawa, Motoo

    AU - Takemoto, Kosuke

    AU - Tashima, Kenichi

    AU - Kajino, Satoshi

    PY - 2018/12/1

    Y1 - 2018/12/1

    N2 - Background: Measurement of the ductility like elongation and reduction of area of the fine metal wire is important because of the progress for the weight reduction and miniaturization of various products. This study established a simple and reliable method of measuring the ductility of a fine metal wire. Methods: Tensile and loading-unloading tests were performed with applying initial load to high-carbon steel wire (diameters of 0.06–0.296 mm) through capstan-type grippers for non-metal fiber. The wire fastened with the grippers was separated into three parts: the fastened part, the contact part, and the non-contact part. Scanning electron microscope (SEM) images were used to measure the wire radius under uniform deformation and agreed well with the radius calculated using the radius before tensile testing and uniform elongation. Results: The following conditions were clarified: non-slippage at the fastening between gripper and wire, a longitudinally uniform elongation, negligible cross-head bending, and the stroke calculation accuracy of elongated length by the initial load. Thus, uniform elongations were calculated as the ratio of the stroke at 0 N subtracted from the stroke at maximum tensile load to the additional initial chuck distance and the stroke at 0 N. The maximum error of uniform elongation was 0.21%. The reduction of area could be calculated by using the radius at uniform deformation portion, while the radius at the most constricted point was measured using SEM image of one fractured piece and uniform elongation. The measurement error of reduction of area was 1.9%. Conclusion: This measurement method can be applied to other metal wires less than 1 mm in diameter.

    AB - Background: Measurement of the ductility like elongation and reduction of area of the fine metal wire is important because of the progress for the weight reduction and miniaturization of various products. This study established a simple and reliable method of measuring the ductility of a fine metal wire. Methods: Tensile and loading-unloading tests were performed with applying initial load to high-carbon steel wire (diameters of 0.06–0.296 mm) through capstan-type grippers for non-metal fiber. The wire fastened with the grippers was separated into three parts: the fastened part, the contact part, and the non-contact part. Scanning electron microscope (SEM) images were used to measure the wire radius under uniform deformation and agreed well with the radius calculated using the radius before tensile testing and uniform elongation. Results: The following conditions were clarified: non-slippage at the fastening between gripper and wire, a longitudinally uniform elongation, negligible cross-head bending, and the stroke calculation accuracy of elongated length by the initial load. Thus, uniform elongations were calculated as the ratio of the stroke at 0 N subtracted from the stroke at maximum tensile load to the additional initial chuck distance and the stroke at 0 N. The maximum error of uniform elongation was 0.21%. The reduction of area could be calculated by using the radius at uniform deformation portion, while the radius at the most constricted point was measured using SEM image of one fractured piece and uniform elongation. The measurement error of reduction of area was 1.9%. Conclusion: This measurement method can be applied to other metal wires less than 1 mm in diameter.

    KW - Elongation

    KW - Fine metal wire

    KW - Reduction of area

    KW - Tensile testing

    UR - http://www.scopus.com/inward/record.url?scp=85042748595&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85042748595&partnerID=8YFLogxK

    U2 - 10.1186/s40712-018-0091-0

    DO - 10.1186/s40712-018-0091-0

    M3 - Article

    AN - SCOPUS:85042748595

    VL - 13

    JO - International Journal of Mechanical and Materials Engineering

    JF - International Journal of Mechanical and Materials Engineering

    SN - 1823-0334

    IS - 1

    M1 - 5

    ER -