Micromechanics of Amorphous Metal/Polymer Hybrid Structures with 3D Cellular Architectures: Size Effects, Buckling Behavior, and Energy Absorption Capability

Mieszala, Maxime; Hasegawa, Masaya; Guillonneau, Gaylord; Bauer, J.; Raghavan, R.; Frantz, Cédric; Kraft, O.; Mischler, S.; Michler, Johann; Philippe, Laëtitia

doi:10.1002/smll.201602514

Cited by 86 publications

(73 citation statements)

References 53 publications

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“…[42] Meanwhile, the HEA is in the ductile-to brittle transition due to the size effects. [41] Therefore, a brittle behavior would be observed at a certain point, which is in good agreement with other reports. [12,41,42] To demonstrate the important role of the polymer core in the composite nanolattices, a loading-unloading compression test was employed ( Figure S4).…”

Section: Hea Filmsupporting

confidence: 92%

“…[41] Therefore, a brittle behavior would be observed at a certain point, which is in good agreement with other reports. [12,41,42] To demonstrate the important role of the polymer core in the composite nanolattices, a loading-unloading compression test was employed ( Figure S4). As shown in the exhibited mechanical behaviors, nearly the same Young's modulus (74.5 AE 3.5 MPa) was observed, indicating the superior recoverability of the composite nanolattices under an applied strain of nearly 8%.…”

Section: Hea Filmsupporting

confidence: 92%

“…[43] It is worth mentioning that the composite nanolattices exhibit superior compressive strain, which possibly due to the polymeric core supporting. Finally, through these data, it can be calculated that the specific compressive strength of the presented composite nanolattices is 0.032 MPa kg À1 m 3 , which is comparable even higher than that of the micro/nano lattice reported before, for instance, polymer/NiB (0.017 MPa kg À1 m 3 ), [41] polymer/Si 3 N 4 (0.012 MPa kg À1 m 3 ), [42] and SiC microlattices (%0.023 MPa kg À1 m 3 ) [44] and a detailed comparison can be found in Table S1, demonstrating the superior mechanical properties of the composite nanolattices based on the synergistic effect between polymer and HEA film. Thin films, both amorphous and crystalline films, have been extensively reported to be capable of enhancing the performance of many types of materials through coating, especially the mechanical performance of substrate materials.…”

Section: Hea Filmsupporting

confidence: 60%

“…A nonlinear strain produced by the misalignment between the flat punch and top plane of the architecture structure was always observed, which had a minor effect on the overall mechanical response. [41] For the polymer nanolattice, an uniform plateau was observed in the stress after the elastic regime at %15% strain and 4 MPa. For www.advancedsciencenews.com www.aem-journal.com the composite nanolattices, a linear region up to 11% at 7.76 MPa was observed, followed by a brittle failure at 12% (as shown in Figure 5c-g).…”

Section: Hea Filmmentioning

confidence: 94%

“…Thin films, both amorphous and crystalline films, have been extensively reported to be capable of enhancing the performance of many types of materials through coating, especially the mechanical performance of substrate materials. [41,[45][46][47] Furthermore, scaling down a material structure down to the nanoscale can cause them to exhibit different behaviors, as compared to their bulk counterparts, in which they become stronger as their size is reduced according to the Hall-Petch relationship. [23,48,49] Therefore, it is hypothesized that a thin HEA film at nanoscale may greatly enhance the mechanical performance of the composite micro/nano structure.…”

Section: Hea Filmmentioning

confidence: 99%

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High‐Entropy Alloy (HEA)‐Coated Nanolattice Structures and Their Mechanical Properties

et al. 2017

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Nanolattice structure fabricated by two-photon lithography (TPL) is a coupling of size-dependent mechanical properties at micro/nano-scale with structural geometry responses in wide applications of scalable micro/nano-manufacturing. In this work, three-dimensional (3D) polymeric nanolattices are initially fabricated using TPL, then conformably coated with an 80 nm thick high-entropy alloy (HEA) thin film (CoCrFeNiAl 0.3 ) via physical vapor deposition (PVD). 3D atomic-probe tomography (APT) reveals the homogeneous element distribution in the synthesized HEA film deposited on the substrate. Mechanical properties of the obtained composite architectures are investigated via in situ scanning electron microscope (SEM) compression test, as well as finite element method (FEM) at the relevant length scales. The presented HEA-coated nanolattice encouragingly not only exhibits superior compressive specific strength of %0.032 MPa kg À1 m 3 with density well below 1000 kg m À3 , but also shows good compression ductility due to its composite nature. This concept of combining HEA with polymer lattice structures demonstrates the potential of fabricating novel architected metamaterials with tunable mechanical properties.

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Section: Hea Filmsupporting

confidence: 92%

Section: Hea Filmsupporting

confidence: 92%

Section: Hea Filmsupporting

confidence: 60%

Section: Hea Filmmentioning

confidence: 94%

Section: Hea Filmmentioning

confidence: 99%

See 3 more Smart Citations

High‐Entropy Alloy (HEA)‐Coated Nanolattice Structures and Their Mechanical Properties

et al. 2017

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Nature‐Inspired Lightweight Cellular Co‐Continuous Composites with Architected Periodic Gyroidal Structures

et al. 2017

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Shell-core cellular composites are a unique class of cellular materials, where the base constituent is made of a composite material such that the best distinctive physical and/or mechanical properties of each phase of the composite are employed. In this work, the authors demonstrate the additive manufacturing of a nature inspired cellular three-dimensional (3D), periodic, co-continuous, and complex composite materials made of a hard-shell and soft-core system. The architecture of these composites is based on the Schoen's single Gyroidal triply periodic minimal surface. Results of mechanical testing show the possibility of having a wide range of mechanical properties by tuning the composition, volume fraction of core, shell thickness, and internal architecture of the cellular composites. Moreover, a change in deformation and failure mechanism is observed when employing a shell-core composite system, as compared to the pure stiff polymeric standalone cellular material. This shell-core configuration and Gyroidal topology allowed for accessing toughness values that are not realized by the constituent materials independently, showing the suitability of this cellular composite for mechanical energy absorption applications.

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Microarchitected Stretching‐Dominated Mechanical Metamaterials with Minimal Surface Topologies

et al. 2018

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Historically, the creation of lightweight, yet mechanically robust, materials have been the most sought‐after engineering pursuit. For that purpose, research efforts are dedicated to finding pathways to emulate and mimic the resilience offered by natural biological systems (i.e., bone and wood). These natural systems evolved over time to provide the most attainable structural efficiency through their architectural characteristics that can span over multiple length scales. Nature‐inspired man‐made cellular metamaterials have effective properties that depend largely on their topology rather than composition and are hence remarkable candidates for a wide range of application. Despite their geometrical complexity, the fabrication of such metamaterials is made possible by the emergence of advanced fabrication techniques that permit the fabrication of complex architectures down to the nanometer scale. In this work, we report the fabrication and mechanical testing of nature‐inspired, mathematically created, micro‐architected, cellular metamaterials with topologies based on triply periodic minimal surfaces (TPMS) with cubic symmetries fabricated through direct laser writing two‐photon lithography. These TPMS‐based microlattices are sheet/shell‐ and strut‐based metamaterials with high geometrical complexity. Interestingly, results show that TPMS sheet‐based microlattices follow a stretching‐dominated mode of deformation, and further illustrate their mechanical superiority over the traditional and well‐known strut‐based microlattices and microlattice composites. The TPMS sheet‐based polymeric microlattices exhibited mechanical properties superior to other micrloattices comprising metal‐ and ceramic‐coated polymeric substrates and, interestingly, are less affected by the change in density, which opens the door for fabricating ultralightweight materials without much sacrificing mechanical properties.

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Micromechanics of Amorphous Metal/Polymer Hybrid Structures with 3D Cellular Architectures: Size Effects, Buckling Behavior, and Energy Absorption Capability

Cited by 86 publications

References 53 publications

High‐Entropy Alloy (HEA)‐Coated Nanolattice Structures and Their Mechanical Properties

High‐Entropy Alloy (HEA)‐Coated Nanolattice Structures and Their Mechanical Properties

Nature‐Inspired Lightweight Cellular Co‐Continuous Composites with Architected Periodic Gyroidal Structures

Microarchitected Stretching‐Dominated Mechanical Metamaterials with Minimal Surface Topologies

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