Segregation behaviors in {101¯1} compressive twin boundaries of Mg-RE alloy under deformation at room temperature

IF 13.8 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING Journal of Magnesium and Alloys Pub Date : 2025-01-01 Epub Date: 2024-06-08 DOI:10.1016/j.jma.2024.05.023

Yujie Cui , Lili Guo , Yunwei Gui , Kenta Aoyagi , Haotian Tong , Qinqin Wei , Fangzhou Liu , Yuichiro Hayasaka , Akihiko Chiba

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Abstract

Solute atoms and precipitates significantly influence the mechanical properties of Mg alloys. Previous studies have mainly focused on the segregation behaviors of Mg alloys after annealing. In this study, we investigated the segregation behaviors of an Mg-RE alloy under deformation. We found that the enrichment of solute atoms occurred in {10

\bar{1}

1} compressive twin boundaries under compression at 298 K without any annealing in an Mg-RE alloy by scanning transmission electron microscopy and energy-dispersive X-ray analysis. The segregated solutes and precipitates impeded the twin growth, partially contributing to the formation of small-sized {10

\bar{1}

1} compressive twins. This research indicates the twin boundaries can be strengthened by segregated solutes and precipitates formed under deformation at room temperature.

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变形条件下 Mg-RE 合金{101¯1}压缩孪晶边界的偏析行为

溶质原子和析出物对镁合金的力学性能有显著影响。以往的研究主要集中在镁合金退火后的偏析行为。本文研究了一种Mg-RE合金在变形条件下的偏析行为。通过扫描透射电子显微镜和能量色散x射线分析发现，在298k压缩条件下，Mg-RE合金在{101¯1}压缩孪晶界处发生了溶质原子的富集。析出的溶质和析出物阻碍了孪晶的生长，部分促成了小尺寸{101¯1}压缩孪晶的形成。研究表明，在室温下变形形成的溶质和析出相可以强化孪晶边界。

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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.