Pore morphology of porous Al-Ti alloy fabricated by continuous casting in hydrogen atmosphere

T. B. Kim, M. Tane, Shinsuke Suzuki, H. Nakajima

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Porous Al-5 mass%Ti alloy was fabricated by unidirectional solidification in hydrogen atmosphere, using a continuous casting technique. The porous Al-Ti alloy was prepared at different transfer (solidification) velocities, and the effect of transfer velocity on the pore morphology was investigated. It was found that the pore shape changes with increasing transfer velocity, while the porosity does not change with increasing transfer velocity. In the case of a low transfer velocity (0.5 mm·min-1), elongated pores surrounded by the columnar microstructure are formed, which indicates that the pores grow along the solidification direction together with the solid phase. In the case of a middle transfer velocity (5.0 mm·min-1), elongated pores surrounded by the columnar microstructure and needle or plate-like Al 3Ti alloys are formed. In the case of a high transfer velocity (10.0 mm·min-1), spherical pores surrounded by the equiaxed microstructure are formed, because the primary crystals formed in the solidification front prevent the growth of elongated pores. It is suggested that the pore morphology is closely related with the solidification rate.

    Original languageEnglish
    Pages (from-to)1871-1877
    Number of pages7
    JournalMaterials Transactions
    Volume51
    Issue number10
    DOIs
    Publication statusPublished - 2010 Oct

    Fingerprint

    Continuous casting
    Hydrogen
    porosity
    atmospheres
    Solidification
    hydrogen
    solidification
    Microstructure
    microstructure
    Needles
    Porosity
    needles
    solid phases
    Crystals

    Keywords

    • Aluminum-titanium alloys
    • Porous aluminum alloys
    • Porous metals
    • Unidirectional solidification

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Pore morphology of porous Al-Ti alloy fabricated by continuous casting in hydrogen atmosphere. / Kim, T. B.; Tane, M.; Suzuki, Shinsuke; Nakajima, H.

    In: Materials Transactions, Vol. 51, No. 10, 10.2010, p. 1871-1877.

    Research output: Contribution to journalArticle

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