Mechanical property and microstructure evolution of novel Al-Mg-Zn(-Cu) alloys under dynamic impact

Haoran Liu; Zeyu Zhao; Di Zhang

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Mechanical property and microstructure evolution of novel Al-Mg-Zn(-Cu) alloys under dynamic impact

机译：Mechanical property and microstructure evolution of novel Al-Mg-Zn(-Cu) alloys under dynamic impact

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Dynamic impact performance is one of the most important properties for lightweight aluminium armour vehicles. Here, we study the microstructure evolution of novel high-strength T-Mg_(32)(AlZnCu)_(49) phase strengthened Al-Mg-Zn(-Cu) alloysduring dynamic impact with strain rates from 2800 to 4800 s~(-1). Adiabatic shear bands appeared in both alloys after impact at 4800 s~(-1). Recrystallisation occurred inside ASB of the Cu-bearing alloy because of the higher temperature rise compared with Cu-free alloy. The negative change of flow stress is observed at 4800 s~(-1) for Cu-free alloy, but for Cu-bearing alloy that is positive at strain rates from 2800 to 4800 s~(-1), and the coarsening and decrease in the density of precipitates should be responsible for this rather than recrystallisation.

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《Materials Science and Technology: MST: A publication of the Institute of Metals》 |2021年第10期|852-862|共11页
作者
Haoran Liu; Zeyu Zhao; Di Zhang;
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作者单位

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, People's Republic of China;

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正文语种英语
中图分类工程材料学;
关键词
Al alloy; dynamic impact; adiabatic shear bands; precipitates; temperature rise;

Mechanical property and microstructure evolution of novel Al-Mg-Zn(-Cu) alloys under dynamic impact

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