Synergy improved the strength and ductility of Al-Zn-Mg-Cu-Fe alloys via coupling control of solute gradient and multi-scale precipitates

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-09-23 DOI:10.1016/j.msea.2025.149168

Congcong Wang , Mingxing Guo , Jinming Zhi , Xiangyang Chen , Hu Wang , Linzhong Zhuang

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引用次数: 0

Abstract

This work systematically examined the effects of various heat treatments on the precipitation characteristics of heterogeneous-structured Al-Zn-Mg-Cu-Fe alloys. The findings demonstrate that the gradient solute atom distribution characteristics in hetero-structured alloys significantly influence the aging precipitate development of the alloys. Furthermore, the newly developed non-isothermal aging (NIA) can dramatically shorten the peak aging time and enhance the strength without compromising its ductility. The key to improving the properties of the heterogeneous-structured alloy involves forming intragranular multi-scale precipitates and discontinuous phases at grain boundaries while greatly eliminating precipitation-free zones along the boundaries. Additionally, the precipitation mechanisms of heterogeneous-structured alloys during both isothermal aging (IA) and NIA treatments are systematically described in this work.

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协同作用通过对溶质梯度和多尺度析出相的耦合控制提高了Al-Zn-Mg-Cu-Fe合金的强度和塑性

本文系统地研究了不同热处理方式对非均质组织Al-Zn-Mg-Cu-Fe合金析出特性的影响。结果表明，异质组织合金中梯度溶质原子分布特征对合金时效析出相的发育有显著影响。此外，新开发的非等温时效（NIA）可以显著缩短峰值时效时间，在不影响塑性的情况下提高强度。提高非均质组织合金性能的关键是在晶界处形成晶内多尺度相和不连续相，同时大大消除晶界处的无析出区。此外，本文还系统地描述了异质组织合金在等温时效（IA）和NIA时效过程中的析出机制。

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

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.