Two-step foaming process combined with hot-rolling in fabrication of an aluminium foam sandwich panel

Lu, Xiaopeng; Luo, Hongjie; Yang, Shuo; Wei, You; Xu, Jinkai; Yao, Zhi Yuan

doi:10.1016/j.matlet.2020.127427

Cited by 16 publications

(6 citation statements)

References 13 publications

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“…(3) Rapid foaming was used to prepare the AFS with metallic bonding. The detailed description of the fabrication process was noted in our previous work [5], and the schematic illustration of the AFS fabrication process is shown in Figure 1. The specific process parameters are shown in Table 2, and three sets of specimens were foamed under each condition.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 10e shows the typical sandwich shear failure stress-strain curve of Sample 3. The AlSi12 alloy foam core is more brittle under bending tests [5]. As illustrated in Figure 10f, the broken area of Sample 3 is marked by the red line which presents "T" and "X" shapes.…”

Section: Three-bending Deformation Processmentioning

confidence: 98%

“…Combined with the XRD spectra of the precursor and AFS (Figure 4), a high temperature refractory spinel phase (MgAl 2 O 4 ) was formed in this alloy system. The presence of MgAl 2 O 4 in the foaming process can restrain the gravity drainage of the melt and stabilize the cell structure [5,[31][32][33]. In addition, the SiC particles embedded in the matrix can be seen in all stages of fabrication, and this greatly improves the stability of the foaming process and the uniformity of the cell structure.…”

Section: Microstructure and Morphologymentioning

confidence: 99%

“…As to AFS, the factors influencing the performance of AFSs can be extended to the pore structure of the foam core and the interface bonding type between the cover sheet and foam core. The bonding between the metallic cover sheet and foam core can be divided into mechanical and metallic joints [5]. Mechanical bonding can be obtained by adhesives, riveting, screwing, etc.…”

Section: Introductionmentioning

confidence: 99%

“…By contrast, the metallic joint AFS with so many advantages (e.g., inflammability, heat resistance, long-term stability, high bonding strength, etc.) can be obtained by rolling [5], soldering [6], hot pressing [7], friction stir welding [8], laser welding [9], and so on. Some research work on fabrication processes for Al foam sandwiches is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Deformation Correlation of an Aluminum Foam Sandwich Subject to Three-Point Bending

Lu,

Jing,

Zhou

et al. 2024

Materials

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An Al-Si matrix foam sandwich (AFS) with 6063 Al alloy cover sheets was fabricated by hot rolling combined with melt foaming. A foamable AlSiMg1/SiCp matrix precursor was prepared by the melting route. Hot rolling at 480 °C was carried out to obtain a mechanical bonding interface between the cover sheet and the foamable precursor. Meanwhile, the pore structure of the AFS was deeply affected by the foaming temperature and foaming time during the foaming process. Different pore growth mechanics of the crack-like pore disappearance mechanism (CDM) and pore active expansion mechanism (AEM) were concluded based on the pressure difference in pores inside and outside. Three bending tests were applied to three types of AFSs with different pore structures to evaluate the relation between pore structures and AFS mechanical properties. The bending property of the AFS with fewer layers of pores is like that of a dense material. The bending property of the AFS with a pore size in the range of 0~1 mm presents a typical sandwich shear failure mode. The AFS with a uniform pore structure, in which the shapes of the pores are predominately polygons and the pore diameter is concentrated in the range of 0.5~3 mm, processes a good energy absorption capacity, and the bending stress–strain curve fluctuates greatly after the first stress drop.

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Section: Methodsmentioning

confidence: 99%

Section: Three-bending Deformation Processmentioning

confidence: 98%