Influence of Al foil interlayer on performance of vacuum diffusion bonding joint of 6061 aluminium alloy

IF 2.5 2区材料科学 Journal of Iron and Steel Research International Pub Date : 2024-08-12 DOI:10.1007/s42243-024-01302-6

Da-shuang Liu, Jian-hua Xu, Xiong-hui Li, Ping Wei, Yun Liang, Jian Qin, Hua-wei Sun, Tian-ran Ding, Zong-ye Ding, Su-juan Zhong, Lei Zhang, Wei-min Long

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Abstract

The vacuum diffusion bonding method was used to introduce Al foil as the middle layer, and 6061 aluminium alloy was vacuum diffusion bonding together. The typical microstructure characteristics and mechanical properties of 6061/Al/6061 welded joints were studied in detail, the effects of process parameters and Al intermediate layer on the microstructure and mechanical properties were revealed, and the diffusion bonding mechanism of 6061/Al/6061 welded joints was described. Al foil middle layer welded joint had the best performance at the temperature of 540 °C, the holding time of 120 min, and the welding pressure of 4 MPa. The bonding ratio is 95.91%, the shear strength is 79 MPa, and the deformation rate is 8.05%, and the introduction of Al intermediate layer improves the element distribution and microstructure, so that the bonding ratio of the welded joint is increased by 10.86%, the shear strength is increased by 5.55 MPa, and the deformation rate is reduced by 1.58%. The fracture morphology has typical ductile fracture characteristics.

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铝箔夹层对 6061 铝合金真空扩散粘接接头性能的影响

采用真空扩散粘接法引入铝箔作为中间层，与 6061 铝合金进行真空扩散粘接。详细研究了 6061/Al/6061 焊接接头的典型显微组织特征和力学性能，揭示了工艺参数和铝中间层对显微组织和力学性能的影响，并阐述了 6061/Al/6061 焊接接头的扩散结合机理。在温度为 540 ℃、保温时间为 120 min、焊接压力为 4 MPa 的条件下，铝箔中间层焊接接头的性能最佳。铝中间层的引入改善了元素分布和微观结构，使焊接接头的结合率提高了 10.86%，剪切强度提高了 5.55 MPa，变形率降低了 1.58%。断口形态具有典型的韧性断口特征。

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来源期刊

Journal of Iron and Steel Research International 工程技术-冶金工程

自引率

16.00%

发文量

161

审稿时长

2.8 months

期刊介绍： Publishes critically reviewed original research of archival significance Covers hydrometallurgy, pyrometallurgy, electrometallurgy, transport phenomena, process control, physical chemistry, solidification, mechanical working, solid state reactions, materials processing, and more Includes welding & joining, surface treatment, mathematical modeling, corrosion, wear and abrasion Journal of Iron and Steel Research International publishes original papers and occasional invited reviews on aspects of research and technology in the process metallurgy and metallic materials. Coverage emphasizes the relationships among the processing, structure and properties of metals, including advanced steel materials, superalloy, intermetallics, metallic functional materials, powder metallurgy, structural titanium alloy, composite steel materials, high entropy alloy, amorphous alloys, metallic nanomaterials, etc..