Simultaneously improving mechanical and corrosion properties of Mg-Y-Nd-Zr alloy via Sm addition

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Magnesium and Alloys Pub Date : 2025-07-24 DOI:10.1016/j.jma.2025.06.022

Zheng Wu, Xiaoya Chen, Dongzhen Wang, Quanan Li, Yunwei Gui, Baosheng Liu, Zeyu Zheng, Lingxiao Wang

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Abstract

The strength-ductility trade-off in magnesium alloys remains a critical challenge urgently requiring resolution in their engineering applications. In this study, both mechanical and corrosion properties are enhanced in extruded Mg-Y-Nd-Zr alloys by Sm addition. Sm promotes dynamic recrystallization, activates non-basal slip systems and weakens basal texture intensity, leading to the sub-grain lamellar structure and rare earth texture. The EWS2 alloy exhibits an outstanding combination of high yield strength (328 MPa) and ductility (15.1 %). Furthermore, the fragmented second phases in the Sm-containing alloy are uniformly distributed, reducing the subsequent corrosion driving force after micro-galvanic corrosion and facilitating the growth of a more passivating and compact corrosion film. These combined effects contribute to the lowest degradation rate in the EWS2 alloy. This study demonstrates the correlation between microstructure and properties in Sm-containing WE series alloys, providing insights for the design of other high performance magnesium alloys.

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通过添加Sm，可以同时改善Mg-Y-Nd-Zr合金的力学性能和腐蚀性能

在镁合金的工程应用中，强度与延性的权衡仍然是一个迫切需要解决的关键挑战。在本研究中，Sm的加入提高了挤压Mg-Y-Nd-Zr合金的力学性能和腐蚀性能。Sm促进动态再结晶，激活非基底滑移体系，减弱基底织构强度，形成亚晶片层组织和稀土织构。EWS2合金具有良好的屈服强度（328 MPa）和延展性（15.1%）。此外，含sm合金中破碎的第二相分布均匀，减少了微电偶腐蚀后的后续腐蚀驱动力，有利于形成更钝化致密的腐蚀膜。这些综合作用使得EWS2合金的降解率最低。本研究揭示了含sm WE系列合金的微观组织与性能之间的相关性，为其他高性能镁合金的设计提供了参考。

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.