Evolution of Microstructure, Texture, and Room Temperature Mechanical Properties of Hot-Extruded Mg-4Gd-xZn Alloys with Homogenization Followed by Furnace Cooling Treatment

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2026-06-05 DOI:10.1007/s12540-025-02183-4

Zhiyong Kan, Guangyu Yang, Chunhui Wang, Wanqi Jie

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Abstract

Microstructure, texture and room temperature mechanical properties of hot-extruded Mg-4Gd-xZn (0, 1, 2 wt%) alloys were comparatively investigated. The results showed that hot-extruded Mg-4Gd-xZn alloys was mainly consist of α-Mg matrix and second phases streamlined along extrusion direction. Besides, some LPSO/SFs and W phases were found in grain interiors of hot-extruded Mg-4Gd-(1, 2) Zn alloys. With the increase of Zn content, the average grain size was firstly refined from 18.5 to 7.5 μm and then increased to 9.3 μm. The proportion of rare earth texture component of hot-extruded Mg-4Gd alloy was decreased after Zn addition, with the lowest proportion observed in the hot-extruded Mg-4Gd-1Zn alloy. It was found that hot-extruded Mg-4Gd-1Zn alloy exhibited the best room temperature mechanical properties, with yield strength, ultimate tensile strength and elongation of 150 MPa, 244 MPa and 29.3%, respectively. Compared with the hot-extruded Mg-4Gd alloy, its yield strength was improved by 58 MPa, with grain boundary and texture strengthening providing the strength increment of over 60%.

Graphical Abstract

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热处理后均匀化Mg-4Gd-xZn合金组织、织构和室温力学性能的演变

比较研究了热挤压Mg-4Gd-xZn （0,1,2 wt%）合金的组织、织构和室温力学性能。结果表明：热挤压Mg-4Gd-xZn合金主要由α-Mg基体和沿挤压方向流线型的第二相组成；此外，在热挤压Mg-4Gd-(1,2) Zn合金的晶粒内部发现了一些LPSO/SFs和W相。随着Zn含量的增加，合金的平均晶粒尺寸先由18.5细化到7.5 μm，再增大到9.3 μm。添加Zn后，热挤压Mg-4Gd合金中稀土织构成分的比例降低，其中热挤压Mg-4Gd- 1zn合金中稀土织构成分的比例最低。结果表明，热挤压Mg-4Gd-1Zn合金室温力学性能最佳，屈服强度为150 MPa，极限抗拉强度为244 MPa，延伸率为29.3%。与热挤压Mg-4Gd合金相比，其屈服强度提高了58 MPa，晶界和织构强化使强度提高了60%以上。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.