Effect of the Cu addition on the mechanical properties and microstructure of open-cell Al foams

Azamar, Manuel F.; Hernández, Brenda J.; Figueroa, I.A.; González, Gonzalo; Novelo-Peralta, O.; Ramos, Carlos

doi:10.1557/s43578-021-00351-x

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…The microstructure of E51 type bisphenol A epoxy resin and D230 type polyetheramine with A ratio of 2:1 is shown in Figure 2a [24]. The growth direction of crack is shown by the arrow, which is single and long on both sides.…”

Section: Microstructure Of Epoxy Resin and Curing Agent With Differen...mentioning

confidence: 99%

Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites

Wu¹,

Wang²,

Zhang³

et al. 2023

Mater. Plast.

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Lignin fiber/epoxy resin compositeused for energy absorbing was prepared by atmospheric stirring method. Quasi-static compressive mechanics tests were implemented by using the electronic universal mechanics tester (WDW-100KN) under ambient conditions to analyze the compressing behavior of the matrix material and composite at the strain rate of 10-2s-1 .Scanning electron microscope (SEM) was used to observe the microstructure of the composite after quasi-static compression damage. The results showed that when the ratio of epoxy resin and curing agent was 3:1, the internal structure of the matrix material was more uniform with smoother cross-section, which represented better mechanical properties. It was found that the addition of lignin fiber changed the compression characteristics of the matrix material, resulting in a strengthening stage appeared. At the same time, when the lignin fiber content was 2% or 3%, the composite could absorb more impact energy and delay crack generation, which met the performance requirement of energy absorbing materials.

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Section: Microstructure Of Epoxy Resin and Curing Agent With Differen...mentioning

confidence: 99%

Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites

Wu¹,

Wang²,

Zhang³

et al. 2023

Mater. Plast.

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Effect of cell size on the response to solution and aging heat treatments of open-cell Al-4.5Cu (wt.%) foams

Azamar¹,

Hernández²,

Figueroa³

et al. 2023

J Mater Sci

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Open-cell Al-4.5Cu (wt.%) foams were produced by the replication casting technique in cell sizes of 2.00–2.38 and 3.35–4.75 mm. The fabricated foams were subjected to solution and aging treatments to assess the effect of such heat treatments on the microstructure and mechanical properties of the foams as a function of cell size. Solution and aging heat treatments were carried out at 535 °C for 5.5 h and 170 °C for 8 h, respectively. The porosity and relative density of all produced samples were estimated by He pycnometer. In addition, the average cell wall thickness was assessed by image analysis to correlate this variable with the response to heat treatments of the material. The microstructural evolution of the heat-treated samples was analyzed by means of scanning electron microscopy, scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and differential scanning calorimetry. The mechanical characterization of the studied samples was carried out using uniaxial compression tests and microhardness tests. It was found that the foams did present different responses to both solution and aging treatments as a function of cell size, attributing these outcomes to the cell wall thickness variations, which presumably conditioned the cooling rates after heat treatments, thereby influencing the resulting microstructures and precipitation of Al-Cu second phases. Graphical abstract

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Assessment of the Microstructural Evolution of Naturally Aged Open-Cell Al-1.96Cu (at.%) Foams

Azamar,

Hernández,

Figueroa

et al. 2024

Metallogr. Microstruct. Anal.

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Open-cell Al-1.96Cu (at.%) foams were produced by the replication casting technique in a 2.00–2.38 mm cell size. The produced foams were solution-treated at 535 °C for 5.5 h. Afterward, natural aging occurred at room temperature for 12, 24, and 36 months, and as a reference artificial aging at 170 °C for 8 h was also reported. The microstructural evolution of the studied samples was assessed through X-ray diffraction, the Rietveld refinement technique, and transmission electron microscopy. In addition, Vickers microhardness tests were carried out for all testing conditions. It was found that the lattice parameter of the supersaturated α-Al phase increased progressively with the natural aging at room temperature, which was attributed to the diffusion from the solid solution of the initially supersaturating Cu atoms toward Guinier–Preston zones and Cu-rich precipitates, thereby relaxing the Al lattice. In addition, it was demonstrated that the microstructure after natural and artificial aging is different.

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Effect of the Cu addition on the mechanical properties and microstructure of open-cell Al foams

Cited by 4 publications

References 33 publications

Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites

Study on Mechanical Properties and Fracture Mechanisms of Lignin Fiber/epoxy Resin Composites

Effect of cell size on the response to solution and aging heat treatments of open-cell Al-4.5Cu (wt.%) foams

Assessment of the Microstructural Evolution of Naturally Aged Open-Cell Al-1.96Cu (at.%) Foams

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