Evaluation of Hydrogen Embrittlement of Electroless Ni–P Plated 6061-T6 Aluminum Alloy by Three-Point Bending and Rotating Bending Fatigue Tests

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  • Hino Makoto
    Department of Mechanical System, Graduate School of Engineering, Hiroshima Institute of Technology
  • Shinno Ryohei
    Department of Mechanical System, Graduate School of Engineering, Hiroshima Institute of Technology
  • Kawaue Kota
    Department of Mechanical System, Graduate School of Engineering, Hiroshima Institute of Technology
  • Kuwano Ryoichi
    Department of Mechanical System, Graduate School of Engineering, Hiroshima Institute of Technology
  • Monden Koji
    C. Uyemura & Co., Ltd.
  • Sato Masaaki
    C. Uyemura & Co., Ltd.
  • Oda Yukinori
    C. Uyemura & Co., Ltd.
  • Horikawa Keitaro
    Graduate School of Engineering Science, Osaka University
  • Kanadani Teruto
    Okayama University of Science

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<p>In this study, 6061-T6 aluminum alloys were plated with electroless Ni–P with different phosphorus content and three-point bending and rotating bending fatigue tests. The effects of hydrogen due to plating on mechanical properties were investigated. It was shown that the ductility decreased immediately after low-phosphorus type and high-phosphorus type Ni–P plating by three-point bending test because a hydrogen was introduced into the alloys. The fatigue strength of the low-phosphorus type Ni–P plated specimen was higher than that of the un-treated specimen, while that of the high-phosphorus type plated specimen was much lower. It is clear that the fatigue strength differs greatly depending on the phosphorus content in the plating film. 6061-T6 aluminum alloy have been reported to exhibit no hydrogen embrittlement in low strain rate tensile tests under wet condition. However, it was found that hydrogen embrittlement occurred when 6061-T6 aluminum alloy was plated with the high-phosphorus type electroless Ni–P and fatigue-tested on rotating bending machine.</p><p> </p><p>This Paper was Originally Published in Japanese in J. Japan. Inst. Met. Mater. 87 (2023) 114–119.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 65 (3), 302-307, 2024-03-01

    公益社団法人 日本金属学会

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