Microstructural damage behaviour of Al foams

Luksch, Jutta; Bleistein, Thomas; Koenig, Kristian; Adrien, Jérôme; Maire, Éric; Jung, Anne

doi:10.1016/j.actamat.2021.116739

Cited by 20 publications

(15 citation statements)

References 29 publications

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“…P nonlinearly varies with h (Figure ). The lowest ascending curves of P and ρ̅ from Figure a indicate the increase of ρ̅ creates a large load since the dense foam provides considerable resistance against deformation occurring . Namely, the loads are improved by increasing the crush zone in the area surrounding the indenter.…”

Section: Results and Discussionmentioning

confidence: 96%

“…Aluminum (Al) foams have been widely used in aerospace, marine, and automobile industries due to their advances in low density, high porosity, large specific surface area, etc. − It is well-known that the load features of Al foams determine their applications. However, limited by test methods and equipment, the mechanical properties of Al foams have not yet been well characterized so far .…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

Wang

Jian

et al. 2021

ACS Omega

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Indentation tests and numerical simulations were conducted to investigate the effects of the indenter parameters (diameter and cone angle) and the relative density of Aluminum (Al) foams on the deformation mechanism of closed-cell Al foams, load response, and energy-absorbing capability. The results demonstrated that the densification occurred below the indenter, and cell tearing and bending occurred on both sides of the indenter, while the lateral plastic deformation insignificantly took place during the indentation tests. The load response and absorbed energy per unit volume dramatically increased with the cone angle of the indenter and the relative density of Al foams. However, the load response slightly increased but the absorbed energy per unit volume linearly decreased with the diameter of the indenter. Interestingly, the energy-absorption efficiency was independent of the diameter and cone angle of the indenter, and the relative density of Al foams as well. Our results suggest the indentation tests are recommended approaches to reflect the mechanical properties of closed-cell Al foams.

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Section: Results and Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

Wang

Jian

et al. 2021

ACS Omega

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“…Other commonly reported techniques for the fabrication of metallic foams are investment casting, [ 18 ] space holder infiltration, [ 19 ] and space holder by powder metallurgy. [ 20 ] Again, the process of investment casting is complicated and costly, and it is difficult to produce small pores and large castings.…”

Section: Introductionmentioning

confidence: 99%

B₄C‐Reinforced Al–Zn Foams Having Superior Energy Absorption Efficiency

et al. 2022

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The low density of the aluminium foam and high energy absorption make them favourable for automobile, aerospace, and defence industries. However, the melt route for foam fabrication has challenges in achieving homogeneous distribution of pores. Hence, we have adopted the space holder technique using the powder metallurgy methodology to overcome such a challenge. In the current study, we fabricated Al–Zn alloy foams reinforced with varying volume fractions of B4C particles using NaCl as a space holder implemented by hot pressure‐assisted sintering and dissolution. X‐ray computed tomography revealed a homogeneous distribution of pores. The quasistatic compression studies showed that the samples containing a higher volume fraction of pores exhibited higher energy absorption efficiency in the fabricated foam. The maximum energy absorption efficiency (η) achieved was ≈93% for the pristine Al alloy foam with ≈50% porosity, which is ≈11% higher than the η value of 9 vol% B4C samples with similar porosity. Additionally, B4C particles delay the sudden collapse of cell walls and stabilize the compression behaviour. Adding B4C improves the η and strength at higher relative density. This fabrication methodology would help us develop foams with a homogenous pore distribution and regular geometry, achieving highly desirable mechanical properties.

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“…Both of them possess two failure mode of cell collapse: buckle fracture and tearing/shearing fracture. Luksch et al [ 37 ] disclosed structure–property relationship of AlSi7Mg0.3 foams, which shows the adverse effect between shrinking holes and maximal technical stress before struts failure under tension. In addition, some of researchers focused on the influence of reinforcement elements on deformation behavior.…”

Section: Introductionmentioning

confidence: 99%

Controllable Design of Structural and Mechanical Behaviors of Al–Si Foams by Powder Metallurgy Foaming

Yang

Xie

et al. 2022

Adv Eng Mater

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Microstructural damage behaviour of Al foams

Cited by 20 publications

References 29 publications

Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

B₄C‐Reinforced Al–Zn Foams Having Superior Energy Absorption Efficiency

Controllable Design of Structural and Mechanical Behaviors of Al–Si Foams by Powder Metallurgy Foaming

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Microstructural damage behaviour of Al foams

Cited by 20 publications

References 29 publications

Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

Mechanical Properties of Al Foams Subjected to Compression by a Cone-Shaped Indenter

B4C‐Reinforced Al–Zn Foams Having Superior Energy Absorption Efficiency

Controllable Design of Structural and Mechanical Behaviors of Al–Si Foams by Powder Metallurgy Foaming

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Product

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B₄C‐Reinforced Al–Zn Foams Having Superior Energy Absorption Efficiency