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

doi:10.2320/matertrans.MT-LA2022015

Special Issue on Aluminium and Its Alloys for Zero Carbon Society, ICAA 18

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

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2023 Volume 64 Issue 2 Pages 421-428

DOI https://doi.org/10.2320/matertrans.MT-LA2022015

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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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