On the role of Zn addition in dispersoid precipitation and associated mechanical properties of Al-Mg-Mn alloy

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

Materials Science and Engineering: A Pub Date : 2025-07-24 DOI:10.1016/j.msea.2025.148864

Shihu Hu , Qipeng Dong , Ziwei Yao , Fangzhen Liu , Zhen Li , Lingsen Zeng , Hiromi Nagaumi

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引用次数: 0

Abstract

This study systematically investigates the effects of Zn addition on the precipitation of Mn-rich dispersoids and associated influence on recrystallization resistance and mechanical properties of an Al-Mg-Mn alloy. The results indicate the significant promotion of dispersoids precipitation with Zn addition, with a substantial increase of 237 % in the number density of Mn-rich dispersoids. Moreover, the uniformity of the dispersoids is markedly enhanced. In response to that, the recrystallization resistance and mechanical properties of the alloy were enhanced. The Zn-bearing alloy retained well the fibrous microstructure, while the Zn-free alloy underwent complete recrystallization. An excellent mechanical property was achieved with the Zn addition, exhibiting an ultimate tensile strength of 459.4 MPa and an elongation of 21 %. The improvement in dispersoids precipitation by Zn addition is attributed to the formation MgZn phase during heating process of homogenization, which provides heterogeneous nucleation sites for the Mn-rich dispersoids.

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添加Zn对Al-Mg-Mn合金弥散析出的影响及其力学性能

本研究系统地研究了添加Zn对Al-Mg-Mn合金富mn分散体析出的影响及其对再结晶性能和力学性能的影响。结果表明，锌的加入显著促进了分散体的析出，富锰分散体的数量密度增加了237%。此外，分散体的均匀性明显增强。因此，合金的抗再结晶性能和力学性能都得到了提高。含锌合金较好地保留了纤维组织，而无锌合金则完全再结晶。添加Zn后，合金的拉伸强度达到459.4 MPa，伸长率达到21%，具有优异的力学性能。锌对分散体析出的改善是由于均匀化加热过程中形成的MgZn相为富mn分散体提供了非均相成核位点。

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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.