Role of Y in High-Strength Mg–Y–Cu–Ni Alloy System with Long-Period Stacking Ordered Phase

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2024-08-24 DOI:10.1007/s12540-024-01793-8

Meng Li, Jonghyun Kim, Zhaobin Zhang, Gao Yu, Bin Jiang, Taekyung Lee, Fusheng Pan

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Abstract

This study has systematically investigated the effect of Y content on the microstructural evolution and mechanical properties of the Mg–Y–Cu–Ni alloy system. Four alloys, Mg_(98−x)Y_xCu₁Ni₁ (x = 1, 2, 3, and 4 at.%), were fabricated and compared in various aspects for this purpose. Increasing Y content gave rise to an increasing fraction of long-period stacking ordered (LPSO) phases, and gradually changed their morphology from massive islands to lamellae. The alloying addition also induced an effective grain refinement, while inhibiting the dynamic recrystallization. When the Y content exceeded 3 at.%, a unique phase formed due to a mechanical mixture of the LPSO phase, the peritectic reaction product of Cu, and the eutectic reaction product of Ni. The mechanical properties were explained in light of the LPSO dispersion parameter. The extruded Mg₉₅Y₃Cu₁Ni₁ alloy exhibited excellent mechanical properties combining a yield strength of 381 MPa, tensile strength of 458 MPa, and elongation-to-failure of 6.7%.

Graphical Abstract

Abstract Image

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Y 在具有长周期堆积有序相的高强度 Mg-Y-Cu-Ni 合金体系中的作用

本研究系统地探讨了 Y 含量对 Mg-Y-Cu-Ni 合金体系的微观结构演变和机械性能的影响。为此，我们制造了四种合金 Mg(98-x)YxCu1Ni1（x = 1、2、3 和 4%），并对其进行了多方面的比较。随着 Y 含量的增加，长周期堆积有序相（LPSO）的比例也在增加，其形态也逐渐从块状岛状转变为片状。合金添加还能有效地细化晶粒，同时抑制动态再结晶。当 Y 含量超过 3%时，由于 LPSO 相、Cu 的包晶反应产物和 Ni 的共晶反应产物的机械混合，形成了一种独特的相。根据 LPSO 分散参数解释了其机械性能。挤压成型的 Mg95Y3Cu1Ni1 合金具有优异的机械性能，屈服强度为 381 兆帕、抗拉强度为 458 兆帕、断裂伸长率为 6.7%。

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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.