Gd和Yb元素在Mg-Gd-Yb镁合金强化中的作用

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-13 DOI:10.1016/j.jallcom.2025.179746

Jie Wang, Mingxu Cai, Baolin Wu, Zaidong Xu, Wenhan Jin, Claude Esling

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引用次数: 0

摘要

在Gd和Yb总含量恒定为10 wt.%的条件下，制备了不同Yb/Gd含量比的Mg-Gd-Yb三元合金。确定了Gd和Yb在强化中的作用。结果表明：固溶处理后的合金保持了Mg5Gd和Mg2Yb相的初生颗粒不溶于mg基体中；在Yb/Gd含量比为0.43时，颗粒的总体积分数最小。这些初级颗粒对强度的贡献较小。时效后，非共格界面的mg基体中析出细小的等轴形Mg5Gd和矩形形Mg2Yb。随着Yb/Gd含量比的增大，Mg5Gd析出相的体积分数减小，Mg2Yb析出相的体积分数增大。时效后的合金表现出明显的时效强化效果。相比之下，Gd对沉淀强化的作用更有效，而对固相强化的作用不如Yb。

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The role of Gd and Yb elements in strengthening Mg-Gd-Yb magnesium alloys

In this study, a series of Mg–Gd–Yb ternary alloys were prepared with different Yb/Gd content ratio in a total constant content of Gd and Yb at 10 wt.%. The role of Gd and Yb in strengthening was identified. The results showed that the alloys after the solid-solution treatment maintained primary particles of Mg₅Gd and Mg₂Yb phases undissolved in Mg-matrix. The total volume fraction of particles was the smallest at the Yb/Gd content ratio of 0.43. These primary particles contributed less to the strength. After aging, fine Mg₅Gd in the equiaxed shape and Mg₂Yb in the rectangular shape precipitated from the Mg-matrix with incoherent interface. The volume fraction of Mg₅Gd precipitates decreased, and that of Mg₂Yb precipitates increased with increasing Yb/Gd content ratio. The aged alloys exhibited evident aging strengthening effect. As compared, Gd played a more effective role in precipitation strengthening, but was less effective in solid-strengthening than Yb.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.