A Novel Method to Fabricate Steel-Al Foam Sandwich Panel with Metallic Bonding
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第6期
论文作者：梁小龙 罗洪杰 LIN Hao LU Xiaotong WU Linli
文章页码：1429 - 1432
摘 要：Al foam sandwich panel（AFS） with metallic bonding was fabricated by foaming a hotpressed three-layer composite with two steel facesheets and a melt route precursor as core. The melt route precursor was fabricated by dispersing undecomposed blowing agent into molten Al, followed by solidification. Microstructures of the joints during fabrication process were analyzed by scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS）. Static three-point bending was conducted to evaluate joint quality of the AFS. It was found that a primary bonding was achieved by hot-pressing and significant diffusion layer of Fe-Al intermetallic compounds was sustained between steel and Al foam core by foaming. Damage modes of the AFS under three-point bending were dominated by indentation, plastic hinges, core shear and crack. Delamination between steel and foam was absent, implying that reliable metallic bonding was achieved. This method allows for producing large-scale AFS with steel facesheets.
梁小龙1，罗洪杰1,2，LIN Hao1，LU Xiaotong1，WU Linli1,2
1. School of Metallurgy, Northeastern University2. Engineering Technology Research Center of Ministry of Education for Materials Advanced Preparation
摘 要：Al foam sandwich panel（AFS） with metallic bonding was fabricated by foaming a hotpressed three-layer composite with two steel facesheets and a melt route precursor as core. The melt route precursor was fabricated by dispersing undecomposed blowing agent into molten Al, followed by solidification. Microstructures of the joints during fabrication process were analyzed by scanning electron microscopy（SEM） and energy dispersive spectroscopy（EDS）. Static three-point bending was conducted to evaluate joint quality of the AFS. It was found that a primary bonding was achieved by hot-pressing and significant diffusion layer of Fe-Al intermetallic compounds was sustained between steel and Al foam core by foaming. Damage modes of the AFS under three-point bending were dominated by indentation, plastic hinges, core shear and crack. Delamination between steel and foam was absent, implying that reliable metallic bonding was achieved. This method allows for producing large-scale AFS with steel facesheets.
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