Deformation of open-cell aluminum foam

Marchi, Chris San; Mortensen, Alicja

doi:10.1016/s1359-6454(01)00294-4

Cited by 178 publications

(118 citation statements)

References 45 publications

(64 reference statements)

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“…1d). Similar structures have been observed in other metal foams prepared by this method [28][29][30]. As indicated in Fig.…”

Section: Resultssupporting

confidence: 87%

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

Qiu

Young

2015

Shap. Mem. Superelasticity

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In order to better understand NiTi-based shape memory alloy foams for implant applications, Ni 40 Ti 50 Cu 10 foams were heat treated and then deformed under incremental and cyclic compression loading. After heat treatment, the microstructure consists of a (Ni,Cu)Ti matrix with small (Ni,Cu) 4 Ti 3 precipitates and a large Ti 2 (Ni,Cu) secondary phase. The heat-treated Ni 40 Ti 50 Cu 10 foam exhibits a two-step transformation, involving B19 0 ? B19 and B19 ? B2 on heating and B2 ? B19 and B19 ? B19 0 on cooling, respectively. One Ni 40 Ti 50 Cu 10 foam was compression loaded for 10 cycles at each subsequent strain level, i.e., 1, 2, 3, 4, 5, and 6 % strain. In each set of compressive stress-strain loops, the maximum stress level decreases due to plastic damage accumulation and/or retention of transformed martensite. Cross-sectional images from micro-computed tomography were collected during compression loading, which shows very uniform deformation without severe structural damage even up to 5 % strain. Localized deformation is visible at 6 % strain.

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“…1d). Similar structures have been observed in other metal foams prepared by this method [28][29][30]. As indicated in Fig.…”

Section: Resultssupporting

confidence: 87%

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

Qiu

Young

2015

Shap. Mem. Superelasticity

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“…Details of the process and the structure of replicated aluminum foams can be found in [17][18][19][20].…”

Section: Methodsmentioning

confidence: 99%

“…The density of the foams was measured from the mass knowing the dimensions of machined test specimens. The salt used in this study is the same as in [19], namely high-purity, spheroidal NaCl particles of an average diameter of 400 lm. All test specimens were machined from the NaCl-Al composite castings prior to removal of the salt.…”

Section: Methodsmentioning

confidence: 99%

Uniaxial deformation of open-cell aluminum foam: the role of internal damage

2004

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Internal damage accumulation is measured and shown to play a role in the mechanical response of replicated pure Al and Al12Si open-cell foams. This internal damage is quantified by measuring the reduction in the foamÕs stiffness with strain. The brittle Si second phase fractures during deformation of Al-12Si foam, resulting in damage accumulation rates an order of magnitude greater than for pure Al foam. Elementary damage mechanics is used to relate the measured rate of damage accumulation to the foamÕs tensile failure strain. The analysis and experimental results highlight in particular the strong embrittling influence of brittle second phases within the foam, such as Si.

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“…They can amongst others be used as catalyst support [1,2], implant material [3], heat exchanger [4], sound absorber [5] and energy/impact absorbers [6,7,8,9,10,11,12,13]. In the future OCMFs may have the potential to partially replace the relatively heavy bulk metals used in crumple zones of cars as low-weight energy absorbers [14].…”

Section: Introductionmentioning

confidence: 99%

“…PtFeAlO, NiTi, Ta) [1,3,16]. This study focuses on those made of aluminium (Al) [6,9,10,11,12,13,14,15]. Jung et al have shown that the energy-absorbing characteristics of OCAFs can be greatly enhanced by coating them with nickel (Ni) [11,12,13,15].…”

Section: Introductionmentioning

confidence: 99%

Open-cell aluminium foams with graded coatings as passively controllable energy absorbers

et al. 2015

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Compared to most bulk materials, open-cell aluminium (Al) foams (OCAFs) are light-weight and can absorb a significant amount of energy in compression, e.g. during impact. When coated with nickel (Ni), OCAFs can absorb even more energy, making them more appropriate for impacts at higher velocities than uncoated OCAFs. When Ni-coated OCAFs experience low-velocity impact however, the stopping distance during the impact is small compared to that of uncoated OCAFs and hence, deceleration occurs fast. This exposes devices (and possibly human beings) protected by OCAFs to large internal forces leading to internal damage. An OCAF that combines the properties of uncoated and coated OCAFs can absorb energy during both low-velocity and high-velocity impact scenarios. This contribution introduces two of such OCAFs which are created by partially and gradually coating OCAFs. The general mechanics of the two OCAFs are revealed using experimental and numerical observation methods.

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Deformation of open-cell aluminum foam

Cited by 178 publications

References 45 publications

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

Mechanical Properties of NiTi-Based Foam with High Porosity for Implant Applications

Uniaxial deformation of open-cell aluminum foam: the role of internal damage

Open-cell aluminium foams with graded coatings as passively controllable energy absorbers

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