控制时效处理Mg-Sn二元合金中Mg2Sn动态析出的原位观察

IF 7.9 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design Pub Date : 2025-09-19 DOI:10.1016/j.matdes.2025.114766

Shujing Wu , Chong Cao , Qingjun Zhang

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引用次数: 0

摘要

Mg2Sn在Mg-9.76wt二元合金中的动态析出和生长。采用原位透射电镜技术实时观察了在180°C-330°C时效的%Sn合金，显示了析出相在哪里以及如何成核、生长或溶解的细节。180℃时在Mg基体中观察到分散的纳米颗粒，240℃-250℃时在基面上逐渐生长成板条状。观察了析出相在300℃~ 330℃适宜温度下的动态再溶解过程，发现其主要与温度、时效时间、表面张力和空位有关。同时，发现了稳定相与Mg基体之间新的取向关系。研究结果将对取向关系形成的微观组织因素有重要意义，并为合金性能的优化提供理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

In situ observation of the dynamic precipitation of Mg2Sn in Mg-Sn binary alloy processed by controlled aging treatment

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In situ observation of the dynamic precipitation of Mg2Sn in Mg-Sn binary alloy processed by controlled aging treatment

The dynamic precipitation and growth of Mg₂Sn in a binary Mg-9.76wt.%Sn alloy aged in the temperature range of 180 °C-330 °C were observed in real time by applying in situ transmission electron microscopy techniques, showing the details where and how precipitates nucleate, grow, or dissolve. The dispersive nanoparticles were observed in the Mg matrix at 180 °C, then gradually grew to a lath-like shape on the basal plane at 240 °C-250 °C. The dynamic re-dissolution process of precipitates at the appropriate temperature of 300 °C-330 °C was observed, which was also found to mainly be related to temperature, aging time, surface tension, and vacancies. Meanwhile, a new orientation relationship between the stable precipitates and the Mg matrix was revealed. The results will give a significant insight into the microstructural factors regarding the formation of the orientation relationships, and provide a theoretical guidance for the optimization of alloy performance.

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.