Effect of viscosity enhancing agents on quasi-static compression behavior of aluminum foams

Singh, Rajvir; Arora, Rama; Sharma, Jagmohan

doi:10.1016/j.matpr.2020.06.056

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…[ 15,16,31,33–37 ] In terms of the strength to weight ratio, the EG composites do not fare as well as vinyl ester syntactic foams, [ 31 ] but outperform them in stiffness to weight ratio. The EG developed in this study perform better than the Al matrix syntactic foams [ 38,39 ] in terms of strength to weight ratio. Vinyl ester is cheaper than aluminum and the expanded glass filler is also inexpensive, making this foam a viable substitute for aluminum foams.…”

Section: Resultsmentioning

confidence: 91%

“…These values are extracted from published literature on compressive properties of foams. Compressive strength comparisons are shown in Figure 7A [ 15,16,31,33–39 ] and compressive modulus in Figure 7B. [ 15,16,31,33–37 ] In terms of the strength to weight ratio, the EG composites do not fare as well as vinyl ester syntactic foams, [ 31 ] but outperform them in stiffness to weight ratio.…”

Section: Resultsmentioning

confidence: 99%

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Effect of expanded glass particle size on compressive properties of vinyl ester syntactic foams

et al. 2022

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The most common fillers for syntactic foam development are glass microballoons or fly ash cenospheres. However, the need for improved properties and reduced cost requires exploring other possibilities. In this work, syntactic foams of vinyl ester resin reinforced with expanded glass particles (EG) were fabricated and compressive properties of the composites were studied. The foam EGS was reinforced with smaller particles of size 0.04–0.125 mm in 15, 30, and 45 vol.% and EGL had larger particles of size 0.25–0.5 mm in 15 and 30 vol.%. Compression testing reveals that 45 vol.% smaller particles enhance the modulus of the EGS foam by up to 48% with a 3.4% reduction in yield strength compared to neat resin. Strain rate sensitivity was observed in both the modulus and yield strength values for all composites. Composite EGS with 15 and 30 vol.% filler showed better strength and modulus than the neat resin at 0.01 s−1 strain rate, which is an overall improvement in the material. When compared with the literature data, the foams made in the present work have the highest compressive strength and modulus for the same density.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Effect of expanded glass particle size on compressive properties of vinyl ester syntactic foams

et al. 2022

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“…For example, TiH 2 forms Al 3 Ti, which is a brittle compound, and due to this, the energy absorption capability is lower than that of the foams produced by CaCO 3 . By differential thermal analysis (DTA) and thermogravimetric analysis (TGA) of CaCO 3 powder, it can be confirmed that its decomposition begins at a temperature of 650 • C and ends at around 900 • C [28]. As a result of that, foaming of CaCO 3 foams needs to be performed at slightly higher temperatures compared to TiH 2 foams.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Foaming Agents on Aluminium Foam Cell Morphology

Rodinger

Ćorić

Alar

2023

Metals

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The choice of foaming agent and its mass fraction significantly affect the size and number of metal foam cells. The powder metallurgy process was used to produce aluminium foams with the addition of various foaming agents: titanium hydride (TiH2) and calcium carbonate (CaCO3). TiH2 was added in an amount of 0.4 wt.%, while the quantity of CaCO3 varied between 3 and 5 wt.%. The produced foams, with approximately the same degree of porosity, were scanned using a non-destructive computed tomography method. The number, size, equivalent diameter, sphericity, and compactness of cells were analysed on the obtained three-dimensional models. The results showed that foams foamed with TiH2 have much larger cells compared to CaCO3 agent. By considering the influence of CaCO3 fraction on the morphology of aluminium foam, it follows that a smaller quantity of CaCO3 (3 wt.%) provides a macrostructure with smaller cells. Samples with five wt.% CaCO3 contain slightly larger cells but are still much smaller than foams with TiH2 foaming agent at the same degree of porosity. The sphericity and compactness indicate that TiH2 foaming agent forms cells of a more regular shape compared to CaCO3 agent.

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“…Ongoing research focuses on developing porous materials speci cally designed for impact energy absorption applications. These materials, reinforced with ceramic particles, aim to enhance foam stability and undergo testing under various strain rate (SR) regimes to assess their performance under compressive loadings [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Influence of B4Cp Concentration and Strain Rate on the Compressive Loading Behavior of Closed Cell Al2024-B4Cp Composite Foams for Enhanced Energy Absorption Applications

Singh,

Sharma,

Kumar

et al. 2024

Preprint

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Aluminum foams find extensive applications in the automotive, marine, and defence industries, owing to their exceptional properties like high specific strength and the ability to absorb energy effectively under constant stress. In the current study, the aluminum composite foams (ACFs) reinforced with different wt% (n=2,4,6,8 and 10) of B4Cp (21-30µm) have been developed by stir casting method and their compressive properties at quasi-static (0.001s-1), intermediate (1s-1) and dynamic loading (680s-1) have been investigated. The study shows that adding B4Cp up to 8wt% initially increases foam expansion and cell size, followed by a decrease, while relative density and cell wall thickness exhibit the opposite trend. At all tested strain rates, the compressive properties such as peak stress, average plateau stress, and energy absorption capacity show a consistent increase with the rise in B4Cp wt%. The density normalized average plateau stress confirmed the strengthening effect due to B4Cp addition in the foam. The developed aluminum foams exhibit strain rate sensitivity in their average plateau stress.

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Effect of viscosity enhancing agents on quasi-static compression behavior of aluminum foams

Cited by 8 publications

References 9 publications

Effect of expanded glass particle size on compressive properties of vinyl ester syntactic foams

Effect of expanded glass particle size on compressive properties of vinyl ester syntactic foams

The Influence of Foaming Agents on Aluminium Foam Cell Morphology

Exploring the Influence of B4Cp Concentration and Strain Rate on the Compressive Loading Behavior of Closed Cell Al2024-B4Cp Composite Foams for Enhanced Energy Absorption Applications

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