Enhancing strength and plasticity in lightweight multicomponent Mg−Al−Zn−Cu−Ce alloys via secondary phase regulation

IF 5.5 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2026-09-01 Epub Date: 2026-10-08 DOI:10.1016/S1003-6326(26)67114-2

Yun-xuan ZHOU, Hao LÜ, Zuo-hong GU, Quan DONG, Jia-xing PENG, Pu-hua YU, Jun TAN, Xian-hua CHEN, Bin JIANG, Fu-sheng PAN

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Abstract

Two novel lightweight multicomponent extruded Mg_92−xAl_xZn₄Cu_3.5Ce_0.5 (x=3 and 8, at.%; labeled as A3 and A8 alloys, respectively) alloys were developed to address the low strength, stiffness, and plasticity of magnesium alloys by tailoring the types and concentrations of the secondary phase. The results demonstrate that the as-extruded A3 alloy exhibits an excellent tensile fracture strain of 10.6%, while the as-extruded A8 alloy has higher ultimate tensile strength and yield strength of 300.5 and 230.0 MPa, respectively. In addition, the main secondary phases of the as-extruded A3 alloy are Al₃CuCe, MgZnCu, and MgAl_0.93Cu_1.07 phases, whereas those of the as-extruded A8 alloy predominantly consist of Al₃CuCe and MgAl_0.93Cu_1.07 phases. Notably, the secondary phases in Mg_92−xAl_xZn₄Cu_3.5Ce_0.5 alloys promote the dynamic recrystallization during the extrusion process. Compared to the A8 alloy, the A3 alloy exhibits superior plasticity, which is primarily attributed to the activation of basal and prismatic slip systems during thermal deformation.

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通过二次相调控提高轻量化多组分Mg−Al−Zn−Cu−Ce合金的强度和塑性

开发了两种新型轻质多组分挤压Mg92−xAlxZn4Cu3.5Ce0.5 （x=3和8，分别标记为A3和A8合金）合金，通过调整二次相的类型和浓度来解决镁合金的低强度、刚度和塑性问题。结果表明：挤压态A3合金的拉伸断裂应变为10.6%，挤压态A8合金的极限抗拉强度和屈服强度分别为300.5和230.0 MPa。挤压态A3合金的次生相主要为Al3CuCe、MgZnCu和MgAl0.93Cu1.07相，挤压态A8合金的次生相主要为Al3CuCe和MgAl0.93Cu1.07相。值得注意的是，Mg92−xAlxZn4Cu3.5Ce0.5合金中的二次相促进了挤压过程中的动态再结晶。与A8合金相比，A3合金表现出优异的塑性，这主要归因于热变形过程中基底滑移系统和棱柱滑移系统的激活。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.