High Strain Rate Deformation Behavior of Gradient Rolling AZ31 Alloy

YingJie Li; Hui Yu; Chao Liu; Yu Liu; Wei Yu; Yuling Xu; Binan Jiang; KwangSeon Shin; Fuxing Yin

doi:10.20944/preprints202406.0237.v1

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preprints.org > chemistry and materials science > metals, alloys and metallurgy > doi: 10.20944/preprints202406.0237.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

High Strain Rate Deformation Behavior of Gradient Rolling AZ31 Alloy

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Version 1 : Received: 20 May 2024 / Approved: 4 June 2024 / Online: 7 June 2024 (11:17:56 CEST)

A peer-reviewed article of this Preprint also exists.

Li, Y.; Yu, H.; Liu, C.; Liu, Y.; Yu, W.; Xu, Y.; Jiang, B.; Shin, K.; Yin, F. High Strain Rate Deformation Behavior of Gradient Rolling AZ31 Alloys. Metals 2024, 14, 788. Li, Y.; Yu, H.; Liu, C.; Liu, Y.; Yu, W.; Xu, Y.; Jiang, B.; Shin, K.; Yin, F. High Strain Rate Deformation Behavior of Gradient Rolling AZ31 Alloys. Metals 2024, 14, 788.

Abstract

A dynamic impact test was performed on as-rolled AZ31 alloy with gradient microstructure under various strains. The microstructural evolution and mechanical properties were systematically investigated. As the strain rate gradually increases, an increasing number of twins are formed, facilitating dynamic recrystallization (DRX), and the mechanical properties are also gradually improved as well. The microstructure becomes heterogeneous at higher strain rates, but the peak stress decreases. The impact process results in significantly higher performance due to microstructural refinement, work hardening by dislocations and precipitates. In addition, both the adiabatic shear band and the adjacent crack experience a temperature rise that exceeds the recrystallization temperature of the alloy. This observation also explains the presence of ultrafine recrystallized grains within the adiabatic shear band and the appearance of molten metal around the crack.

Keywords

AZ31; high strain rate; gradient rolling; microstructure; mechanical property

Subject

Chemistry and Materials Science, Metals, Alloys and Metallurgy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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