Achieving Grain Refinement of Upsized Al–3Mg–0.2Sc (mass%) Round Rods Using Multi-Pass High-Pressure Sliding (MP-HPS)

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  • Tang Yongpeng
    WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
  • Takizawa Yoichi
    Technology Department, Nagano Forging Co., Ltd
  • Yumoto Manabu
    Technology Department, Nagano Forging Co., Ltd
  • Otagiri Yoshiharu
    Technology Department, Nagano Forging Co., Ltd
  • Horita Zenji
    Graduate School of Engineering, Kyushu Institute of Technology Synchrotron Light Application Center, Saga University

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<p>In this study, the multi-pass high-pressure sliding (MP-HPS) process was applied for grain refinement of Al–3Mg–0.2Sc (mass%) rods with an upsized dimension of 16 mm in diameter. To achieve a homogeneous microstructure throughout the cross-section, the rod sample was rotated with 60° around the longitudinal axis (MP-HPS-R) for three times. A microstructure with an average grain size of 280 nm was developed around the center of the cross-section through the MP-HPS-R process. Superplasticity with total elongations of more than 400% was achieved in the 9 mm diameter range on the cross-section of the MP-HPS-R-processed rod.</p><p> </p><p>This Paper was Originally Published in Japanese in J. JILM 70 (2020) 63–65.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 61 (7), 1387-1389, 2020-07-01

    公益社団法人 日本金属学会

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