Influence of Initial Extruded Microstructures of Al–4.4Zn–1.4Mg Alloy Flat Bar on VDA Bendability

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  • Kaharudin Amalina Aina
    Department of Science of Technology Innovation, Nagaoka University of Technology
  • Saeki Ran
    Department of Mechanical Engineering, Nagaoka University of Technology
  • Takaya Mai
    R&D Center, UACJ Corporation
  • Minoda Tadashi
    R&D Center, UACJ Corporation
  • Homma Tomoyuki
    Department of Science of Technology Innovation, Nagaoka University of Technology Department of Mechanical Engineering, Nagaoka University of Technology

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<p>The bendability of extruded Al–4.4Zn–1.4Mg (mass%) alloy flat bars with 1.4 mm thickness having two types of microstructures which are fibrous and recrystallized is evaluated by a Verband der Automobilindustrie (VDA) bending test without pre-strain. The recrystallized specimen has better bendability than the fibrous one. The texture condition nearby the surfaces affects the VDA bendability the most. However, the microvoid formations also contribute in faster cracking phenomena during the load drop of the VDA bending test.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 64 (2), 421-428, 2023-02-01

    公益社団法人 日本金属学会

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