Al-4.4Zn-1.4Mg合金押出し板材のVDA曲げ性に及ぼす初期組織の影響

アマリナ アイナ カハルディン; 佐伯 蘭; 髙谷 舞; 箕田 正; 本間 智之

doi:10.2464/jilm.73.382

RESEARCH ARTICLE

Influence of initial extruded microstructures of Al-4.4Zn-1.4Mg alloy flat bar on VDA bendability

Amalina Aina Kaharudin, Ran Saeki, Mai Takaya, Tadashi Minoda, Tomoyuki Homma

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Keywords: Verband der Automobilindustrie, 7000 series aluminum alloy, extrusion, electron backscatter diffraction, texture

JOURNAL FREE ACCESS

2023 Volume 73 Issue 8 Pages 382-388

DOI https://doi.org/10.2464/jilm.73.382

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Abstract

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.

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