A novel hybrid forming process integrating friction stir welding pre-bonding and hot extrusion for fabrication of Mg/Al laminated composites

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-09-28 DOI:10.1016/j.msea.2025.149184

Yuhong Sun , Shengli Tao , Junlei Zhang , Xiang Chen , Zulai Li , Lujian Cui , Linbing Deng , Guangsheng Huang

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引用次数: 0

Abstract

In this study, multi-layered Mg/Al laminated composites were successfully fabricated using a combination of friction stir welding (FSW) pre-bonding and hot extrusion. The effects of initial stacking sequence (Mg-over-Al and Al-over-Mg) during FSW on interfacial microstructure evolution and mechanical properties were systematically investigated. Microstructure characterization indicated that the Mg/Al layers were primarily composed of fine and uniform equiaxed grains. The stacking sequence had a minimal effect on the texture intensity, grain size, and recrystallization degrees. However, the Mg-over-Al pre-bonding induced significant interfacial metal mixing, leading to the formation of Mg-Al intermetallic compounds (IMCs) inside the plate. In contrast, the Al-over-Mg stacking effectively confined IMCs formation. Mechanical testing results indicated that Al-over-Mg specimen exhibited superior comprehensive mechanical properties (yield strength (YS): 157 MPa, ultimate tensile strength (UTS): 250 MPa, elongation (EL): 9.1 %) compared to the Mg-over-Al configuration (YS:168 MPa, UTS: 183 MPa, EL: 3.4 %). The inferior ductility and strength of the latter were attributed to Mg-Al IMCs at the interface, which initiated cracks and caused premature failure. The marked strength-ductility trade-off highlights the critical influence of the stacking sequence on interfacial IMCs formation and mechanical performance.

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提出了一种搅拌摩擦焊预粘接与热挤压复合成形的镁铝复合材料新工艺

采用搅拌摩擦焊（FSW）预粘接和热挤压相结合的方法制备了多层Mg/Al复合材料。系统研究了FSW初始堆积顺序（Mg-over-Al和Al-over-Mg）对界面微观结构演变和力学性能的影响。显微组织表征表明，Mg/Al层主要由细小均匀的等轴晶组成。堆积顺序对织构强度、晶粒尺寸和再结晶程度的影响最小。然而，mg - on - al预键引起界面金属混合，导致板内形成Mg-Al金属间化合物（IMCs）。相反，Al-over-Mg叠加有效地抑制了IMCs的形成。力学试验结果表明，al - mg复合材料的屈服强度（YS）为157 MPa，极限抗拉强度（UTS）为250 MPa，伸长率（EL）为9.1%)优于mg - al复合材料（YS:168 MPa, UTS: 183 MPa, EL: 3.4%）。后者的延性和强度较差是由于界面处的Mg-Al IMCs引发了裂纹并导致过早破坏。明显的强度-延性权衡凸显了堆砌顺序对界面IMCs形成和力学性能的重要影响。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.