Aging response and mechanism of dual-phase Mg-Li-Al-Zn alloy

IF 15.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys Pub Date : 2025-04-01 DOI:10.1016/j.jma.2024.03.017

Yuchuan Huang, Jiawei Sun, Fangzhou Qi, Youjie Guo, Guohua Wu, Wencai Liu

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引用次数: 0

Abstract

In this work, the aging response and mechanism of dual-phase Mg-Li-Al-Zn alloy at various temperatures are investigated. The results show that the strengthening after quenching is primarily attributed to the immediate precipitation of the semi-coherent ∼Mg₃Zn phase. The aging softening of the studied alloy is mainly caused by the rapid transformation of the strengthening ∼Mg₃Zn phase to the softening MgLi(Al, Zn) phase, along with the coarsening of the α-Mg matrix and precipitates within β-Li matrix. Further analysis indicates that the quick precipitation and transformation of ∼Mg₃Zn is a consequence of the high diffusion rate of solute atoms, resulting from dense vacancy concentration in the β-Li matrix. This research bridges a critical gap in the study of aging mechanism in the dual-phase Mg-Li-Al-Zn alloy, providing a theoretical basis for the development and application of high-performance and thermal-stable Mg-Li alloys.

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双相镁-锂-铝-锌合金的时效响应与机理

本文研究了Mg-Li-Al-Zn双相合金在不同温度下的时效响应及其机理。结果表明，淬火后的强化主要是由于半相干~ Mg3Zn相的直接析出。合金的时效软化主要是由于强化相~ Mg3Zn迅速转变为软化相MgLi(Al, Zn)， α-Mg基体粗化，β-Li基体内析出相。进一步分析表明，β-Li基体中密集的空位浓度导致溶质原子的高扩散速率导致了~ Mg3Zn的快速析出和转变。本研究填补了双相Mg-Li- al- zn合金时效机理研究的重要空白，为高性能热稳定Mg-Li合金的开发和应用提供了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Magnesium and Alloys Engineering-Mechanics of Materials

CiteScore

20.20

自引率

14.80%

发文量

审稿时长

59 days

期刊介绍： The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.