Effect of Cerium on Electrical Conductivity and Mechanical Properties of Al-Mg-Si Alloy

IF 2.3 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2025-09-15 DOI:10.1007/s11837-025-07693-5

Wenjun Xu, Xiaodan Zhao, Xutong Wang, Yao Liu, Wenxin Hu, Yanling Guo, Guangxin Wu

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Abstract

The trade-off between electrical conductivity and strength in conductor alloys has always been an unavoidable dilemma, based on which, Ce (0, 0.1, 0.3 and 0.6 wt %) has been added to the Al-0.8Mg-0.5Si alloy, and an effective heat treatment process has been applied to obtain high-strength, high electrical conductivity alloys. The addition of Ce reduces the solubility of Si and Fe in α-Al, thereby enhancing electrical conductivity. Additionally, CeAlSi₂ phases in the form of dots or rods are formed in the alloy, reducing grain size and improving strength. However, excessive Ce atoms can lead to a “ring-like” phenomenon, which reduces the space between the second phases, increases electron scattering and results in a decrease in electrical conductivity. When the Ce content is 0.3 wt.%, the alloy exhibits optimal comprehensive performance. After secondary aging, the electrical conductivity is 51.03 ± 0.15% IACS. The ultimate tensile strength of the alloy is 292 MPa, and the yield strength is 271 MPa.

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铈对Al-Mg-Si合金电导率和力学性能的影响

导电性和导电性之间的权衡一直是导体合金中不可避免的难题，基于此，在Al-0.8Mg-0.5Si合金中加入了Ce(0、0.1、0.3和0.6 wt %)，并采用有效的热处理工艺获得了高强度、高导电性的合金。Ce的加入降低了Si和Fe在α-Al中的溶解度，从而提高了电导率。此外，在合金中形成点状或棒状的CeAlSi2相，减小了晶粒尺寸，提高了强度。然而，过量的Ce原子会导致“环状”现象，这减少了第二相之间的空间，增加了电子散射，导致电导率下降。当Ce含量为0.3 wt.%时，合金的综合性能最佳。二次时效后，电导率为51.03±0.15% IACS。合金的极限抗拉强度为292 MPa，屈服强度为271 MPa。

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

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.