Enhancement of the hardness of lotus-type porous copper by shot peening

Shigeki Koriyama, Paiboon Sae-Tae, Shinsuke Suzuki, Motoo Asakawa, Takuya Ide, Hideo Nakajima

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    Shot peening process was done on the surfaces of lotus copper plates, which were cut from the lotus copper slabs (with porosity of 37 and 48%) so that the thickness direction was parallel to the pore growth direction and the pores appeared on the surface. Some pores were closed by plastic deformation of the copper near the surface during the shot peening. The number of closed pores increased as peening time increased. Almost all the pores were closed after peening time of 40 s in the specimens of the both porosity of 37 and 48%. The closed pores were covered with a newly formed nonporous skin layer with about 200 μm in thickness. Moreover, the microstructure was fine- grained to the submicron scale in the surface layer with thickness of about 40 μm. The mechanical properties of lotus copper such as Vickers hardness, tensile strength, and bending strength were improved after shot peening. The increment of the mechanical properties was larger than that of nonporous copper. From these results, it became clear that shot peening process can form a work hardened and fine-grained nonporous skin layer on the surface of lotus metal plate. Therefore, shot peening process is considered to be an effective method for the enhancement of mechanical properties of lotus metals with maintaining porous structure.

    Original languageEnglish
    Title of host publicationSteel Research International
    PublisherWiley-VCH Verlag
    Pages1215-1218
    Number of pages4
    VolumeSPL. ISSUE
    ISBN (Print)9783514007970
    Publication statusPublished - 2012
    Event14th International Conference on Metal Forming, METAL FORMING 2012 - Krakow
    Duration: 2012 Sep 162012 Sep 19

    Other

    Other14th International Conference on Metal Forming, METAL FORMING 2012
    CityKrakow
    Period12/9/1612/9/19

    Fingerprint

    shot peening
    Shot peening
    Copper
    hardness
    Hardness
    porosity
    copper
    augmentation
    peening
    Mechanical properties
    mechanical properties
    Skin
    Porosity
    Plate metal
    Vickers hardness
    metal plates
    flexural strength
    Bending strength
    Plastic deformation
    tensile strength

    Keywords

    • Bending strength
    • Copper
    • Hardness
    • Lotus-type porous metal
    • Porous metal
    • Shot peening
    • Tensile strength

    ASJC Scopus subject areas

    • Materials Chemistry
    • Metals and Alloys
    • Condensed Matter Physics
    • Physical and Theoretical Chemistry

    Cite this

    Koriyama, S., Sae-Tae, P., Suzuki, S., Asakawa, M., Ide, T., & Nakajima, H. (2012). Enhancement of the hardness of lotus-type porous copper by shot peening. In Steel Research International (Vol. SPL. ISSUE, pp. 1215-1218). Wiley-VCH Verlag.

    Enhancement of the hardness of lotus-type porous copper by shot peening. / Koriyama, Shigeki; Sae-Tae, Paiboon; Suzuki, Shinsuke; Asakawa, Motoo; Ide, Takuya; Nakajima, Hideo.

    Steel Research International. Vol. SPL. ISSUE Wiley-VCH Verlag, 2012. p. 1215-1218.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Koriyama, S, Sae-Tae, P, Suzuki, S, Asakawa, M, Ide, T & Nakajima, H 2012, Enhancement of the hardness of lotus-type porous copper by shot peening. in Steel Research International. vol. SPL. ISSUE, Wiley-VCH Verlag, pp. 1215-1218, 14th International Conference on Metal Forming, METAL FORMING 2012, Krakow, 12/9/16.
    Koriyama S, Sae-Tae P, Suzuki S, Asakawa M, Ide T, Nakajima H. Enhancement of the hardness of lotus-type porous copper by shot peening. In Steel Research International. Vol. SPL. ISSUE. Wiley-VCH Verlag. 2012. p. 1215-1218
    Koriyama, Shigeki ; Sae-Tae, Paiboon ; Suzuki, Shinsuke ; Asakawa, Motoo ; Ide, Takuya ; Nakajima, Hideo. / Enhancement of the hardness of lotus-type porous copper by shot peening. Steel Research International. Vol. SPL. ISSUE Wiley-VCH Verlag, 2012. pp. 1215-1218
    @inproceedings{a3727099ac2648c08906ce8a185b0b57,
    title = "Enhancement of the hardness of lotus-type porous copper by shot peening",
    abstract = "Shot peening process was done on the surfaces of lotus copper plates, which were cut from the lotus copper slabs (with porosity of 37 and 48{\%}) so that the thickness direction was parallel to the pore growth direction and the pores appeared on the surface. Some pores were closed by plastic deformation of the copper near the surface during the shot peening. The number of closed pores increased as peening time increased. Almost all the pores were closed after peening time of 40 s in the specimens of the both porosity of 37 and 48{\%}. The closed pores were covered with a newly formed nonporous skin layer with about 200 μm in thickness. Moreover, the microstructure was fine- grained to the submicron scale in the surface layer with thickness of about 40 μm. The mechanical properties of lotus copper such as Vickers hardness, tensile strength, and bending strength were improved after shot peening. The increment of the mechanical properties was larger than that of nonporous copper. From these results, it became clear that shot peening process can form a work hardened and fine-grained nonporous skin layer on the surface of lotus metal plate. Therefore, shot peening process is considered to be an effective method for the enhancement of mechanical properties of lotus metals with maintaining porous structure.",
    keywords = "Bending strength, Copper, Hardness, Lotus-type porous metal, Porous metal, Shot peening, Tensile strength",
    author = "Shigeki Koriyama and Paiboon Sae-Tae and Shinsuke Suzuki and Motoo Asakawa and Takuya Ide and Hideo Nakajima",
    year = "2012",
    language = "English",
    isbn = "9783514007970",
    volume = "SPL. ISSUE",
    pages = "1215--1218",
    booktitle = "Steel Research International",
    publisher = "Wiley-VCH Verlag",

    }

    TY - GEN

    T1 - Enhancement of the hardness of lotus-type porous copper by shot peening

    AU - Koriyama, Shigeki

    AU - Sae-Tae, Paiboon

    AU - Suzuki, Shinsuke

    AU - Asakawa, Motoo

    AU - Ide, Takuya

    AU - Nakajima, Hideo

    PY - 2012

    Y1 - 2012

    N2 - Shot peening process was done on the surfaces of lotus copper plates, which were cut from the lotus copper slabs (with porosity of 37 and 48%) so that the thickness direction was parallel to the pore growth direction and the pores appeared on the surface. Some pores were closed by plastic deformation of the copper near the surface during the shot peening. The number of closed pores increased as peening time increased. Almost all the pores were closed after peening time of 40 s in the specimens of the both porosity of 37 and 48%. The closed pores were covered with a newly formed nonporous skin layer with about 200 μm in thickness. Moreover, the microstructure was fine- grained to the submicron scale in the surface layer with thickness of about 40 μm. The mechanical properties of lotus copper such as Vickers hardness, tensile strength, and bending strength were improved after shot peening. The increment of the mechanical properties was larger than that of nonporous copper. From these results, it became clear that shot peening process can form a work hardened and fine-grained nonporous skin layer on the surface of lotus metal plate. Therefore, shot peening process is considered to be an effective method for the enhancement of mechanical properties of lotus metals with maintaining porous structure.

    AB - Shot peening process was done on the surfaces of lotus copper plates, which were cut from the lotus copper slabs (with porosity of 37 and 48%) so that the thickness direction was parallel to the pore growth direction and the pores appeared on the surface. Some pores were closed by plastic deformation of the copper near the surface during the shot peening. The number of closed pores increased as peening time increased. Almost all the pores were closed after peening time of 40 s in the specimens of the both porosity of 37 and 48%. The closed pores were covered with a newly formed nonporous skin layer with about 200 μm in thickness. Moreover, the microstructure was fine- grained to the submicron scale in the surface layer with thickness of about 40 μm. The mechanical properties of lotus copper such as Vickers hardness, tensile strength, and bending strength were improved after shot peening. The increment of the mechanical properties was larger than that of nonporous copper. From these results, it became clear that shot peening process can form a work hardened and fine-grained nonporous skin layer on the surface of lotus metal plate. Therefore, shot peening process is considered to be an effective method for the enhancement of mechanical properties of lotus metals with maintaining porous structure.

    KW - Bending strength

    KW - Copper

    KW - Hardness

    KW - Lotus-type porous metal

    KW - Porous metal

    KW - Shot peening

    KW - Tensile strength

    UR - http://www.scopus.com/inward/record.url?scp=84898472799&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84898472799&partnerID=8YFLogxK

    M3 - Conference contribution

    SN - 9783514007970

    VL - SPL. ISSUE

    SP - 1215

    EP - 1218

    BT - Steel Research International

    PB - Wiley-VCH Verlag

    ER -