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Near-net-shape forming of Al-Al3Ni functionally graded material over eutectic melting temperature

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Abstract

A possibility to make near-net-shape functionally graded material (FGM) products has been examined. The FGM billets having a graded volume fraction of Al3Ni in thickness direction were machined from an Al-Al3Ni FGM thick-walled tube manufactured by a vacuum centrifugal method. Billets, which were set in the container for the backward extruding, were heated to 650 °C to 680 °C, at which temperature the FGM becomes a mixture of molten aluminum eutectic and solid intermetallics. Then, billets were extruded successfully to FGM cups by a semisolid forming, except at 650 °C. Residual bulky Al3Ni particles are found at higher temperature. Thus, an optimum operation temperature is found to be around 660 °C, because bulky Al3Ni particles transform to fine spheroidal or fibrous shape after the forming. The volume fraction of intermetallics at the bottom region of the cup was condensed more than 60 vol pct in a proper billet setting.

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Authors and Affiliations

  1. the Department of Mechanical Engineering, Faculty of Engineering, Kagoshima University, 890-0065, Kagoshima, Japan

    Yasuyoshi Fukui (Professor), Hiroshi Okada (Associate Professor) & Noriyoshi Kumazawa (Assistant)

  2. the Faculty of Textile Science & Technology, Shinshu University, 386-8567, Ueda, Japan

    Yashimi Watanabe (Associate Professor)

Authors
  1. Yasuyoshi Fukui
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  2. Hiroshi Okada
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  3. Noriyoshi Kumazawa
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  4. Yashimi Watanabe
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Fukui, Y., Okada, H., Kumazawa, N. et al. Near-net-shape forming of Al-Al3Ni functionally graded material over eutectic melting temperature. Metall Mater Trans A 31, 2627–2636 (2000). https://doi.org/10.1007/s11661-000-0207-y

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  • DOI: https://doi.org/10.1007/s11661-000-0207-y

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