Achieving grain refinement of upsized Al–3Mg–0.2Sc (mass%) round rods using multi-pass high-pressure sliding (MP-HPS)

  • 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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Other Title
  • マルチパス高圧スライド加工(MP-HPS)によるAl–3Mg–0.2Sc(mass%)合金棒材の大径化と結晶粒超微細化
  • マルチパス コウアツ スライド カコウ(MP-HPS)ニ ヨル Al-3Mg-0.2Sc(mass%)ゴウキンボウザイ ノ タイケイカ ト ケッショウリュウ チョウビサイカ

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Abstract

<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>

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