The Characteristics of Phase Transformation during the Ageing in Aluminium-Rich Zinc Alloys at High Temperature

• Umakoshi Y.

  Department of Metallurgy, Faculty of Engineering, Osaka University

• Yamaguchi M.

  Department of Metallurgy, Faculty of Engineering, Osaka University

• Mima G.

  Faculty of Engineering, Osaka University

抄録

The mechanism of phase transformation in aluminium-rich zinc alloys during high-temperature ageing were studied by means of hardness and electrical resistivity measurements, electron microscopic observation and X-ray Debye-Scherrer photographs. The initial decomposition in the range of the closed miscibility gap and the phases transformation from a supersaturated solid solution to metastable α′ and stable β phases were studied.<BR>The results are as follows: The initial process of decomposition in aluminium-45at% zinc alloy at high temperature (around 290°C) may be due to spinodal decomposition. The very fine grid-like modulated structure by decomposition remarkably attributes to hardening. Following an incubation period after the spinodal decomposition, the α₁–α₂ decomposition is observed. On the initial decomposition of aluminium-20at% zinc alloy, it is found that a fine plate-like or spherical structure of the metastable α′ phase contributes to hardening and the growth of the stable β phase takes place simultaneously with this phase.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 12 (1), 7-12, 1971

  社団法人 日本金属学会

キーワード

• General Engineering

詳細情報

• CRID: 1390282680093873152
• NII論文ID: 130003485073
• DOI: 10.2320/matertrans1960.12.7
• COI: 1:CAS:528:DyaE3MXhtFGjs70%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/12/1/12_1_7/_pdf
• 本文言語コード: en
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