Microalloyed medium-entropy alloy (MEA) composite nanolattices with ultrahigh toughness and cyclability

Feng, Xiaobin; Surjadi, James Utama; Fan, Rong; Li, Xiaocui; Zhou, Wentao; Zhao, Shijun; Lu, Yang

doi:10.1016/j.mattod.2020.10.003

Cited by 37 publications

(18 citation statements)

References 47 publications

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“…The dislocation, twinning, phase transformation and even texture during deformation have been systematically studied [42][43][44][45][46][47] . In overcoming the trade-off between strength and ductility, various factors, including grain refinement [48,49] , heterogeneous structure [50,51] and alloying [52][53][54][55][56][57][58][59][60][61] , have been studied. In addition to their RT and CT properties, their high temperature creep [62] and oxidation resistance [63] has also been explored.…”

Section: Development Of Cocrni Alloymentioning

confidence: 99%

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A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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The CoCrFeMnNi alloy is one of the most notable first-generation high-entropy alloys and is also known as a Cantor alloy. This alloy was first proposed in 2004 and shows promising performance at cryogenic temperatures (CTs). Subsequent research has indicated that the equiatomic ternary CoCrNi medium-entropy alloy (MEA), as a subset of the Cantor alloy family, has better mechanical properties than the CoCrFeMnNi alloy. Interestingly, both the strength and ductility of the CoCrNi MEA are higher at CTs than at room temperature. CoCrNi-based alloys have attracted considerable attention in the metallic materials community and it is therefore important to generalize and summarize the latest progress in CoCrNi-based MEA research. The present review initially briefly introduces the discovery of the CoCrNi MEA. Subsequently, its tensile response and deformation mechanisms are summarized. In particular, the effects of parameters, such as critical resolved shear stress, stacking fault energy and short-range ordering, on the deformation behavior are discussed in detail. The methods for strengthening the CoCrNi MEA are then reviewed and divided into two categories, namely, modifying microstructures and adjusting chemical compositions. In addition, the mechanical performance of CoCrNi-based MEAs, including their dynamic shear properties, creep behavior and fracture toughness, is also deliberated. Finally, the development prospects of CoCrNi-based MEAs are proposed.

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Section: Development Of Cocrni Alloymentioning

confidence: 99%

“…The addition of Nb into the CoCrNi matrix leads to the formation of a Laves phase with a HCP structure [55] . CoCrNiNbx alloys evolve from hypoeutectic (0 < x < 0.4) to eutectic (x = 0.4) and then hypereutectic (x > 0.4) with an increment in the Nb content.…”

Section: Substitutional Elements (Al Fe Mo W Cu Nb and Ti)mentioning

confidence: 99%

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

Xu¹,

Wang²,

Li³

et al. 2022

Microstructures

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“…Despite these recent progresses, it is still challenging to fabricate tunable mechanical metamaterials that exhibit high strength and/or versatile deformability (i.e. toughness/energy absorption) which rivals or exceeds those of non-tunable architected materials (Eckel et al, 2016;Feng et al, 2021;Herná ndez-Nava et al, 2016;Schaedler et al, 2011;Surjadi et al, 2021a;Zheng et al, 2014Zheng et al, , 2016b.…”

Section: Introductionmentioning

confidence: 99%

3D architected temperature-tolerant organohydrogels with ultra-tunable energy absorption

et al. 2021

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“…[1] Recent progress in high-resolution polymer-based additive manufacturing (AM) techniques, such as two-photon polymerization direct laser writing (TPP-DLW), and various coating deposition methods has enabled the development of novel complex core-shell composite nano-and micro-lattice materials. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] By exploiting design elements related to nanoscale size-effects and hierarchical architecture, these fine-featured composite materials have demonstrated unique mechanical properties including high specific strength and recoverability, [5,18] as well as functionality in a broad range of applications ranging from lithium-ion battery technology [15] and energy storage [12] to catalysis [19] and tissue/cell engineering. [20,21] Core-shell composite nano-and micro-lattice systems are generally generated through a multistep process of 1) fabricating a solid-beam lattice scaffold, which is commonly polymer-based via TPP-DLW and 2) subsequently depositing a metallic or ceramic thin film coating via techniques such as atomic layer deposition (ALD), electroless plating, and magnetron sputtering.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetron sputtering, a physical vapor deposition coating technique, has emerged as a versatile method for generating novel core-shell composite nano-and micro-lattice structures. [2][3][4][5][6]18,20,21] Unlike ALD and plating techniques, which rely on specific…”

Section: Introductionmentioning

confidence: 99%

Coatings for Core–Shell Composite Micro‐Lattice Structures: Varying Sputtering Parameters

et al. 2021

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Magnetron sputtering has garnered increased attention as a versatile deposition method for generating novel core–shell composite nano‐ and micro‐lattice materials spanning a wide range of properties and functionalities. Sputtering offers an expansive material workspace consisting of a wide range of ceramics, single‐element metals, and alloy systems. However, achieving uniform coatings on such fine‐featured structures remains a challenge. Thus, herein, a foundational assessment of various sputtering configurations, cathode geometries, and deposition parameters is carried out to investigate their implications on the coating thickness and uniformity of 3D micro‐lattice scaffolds. Specifically, tetrahedral‐truss structures fabricated via direct laser writing are coated by leveraging planar and inverted cylindrical magnetron cathodes at select deposition rates, sputtering powers, and Ar working pressures. Both plasma focused ion beam and microtome sectioning techniques are employed to evaluate the cross section of individual struts and assess overall uniformity. Overall, the influence of key sputtering factors on the design and development of core–shell composite nano‐ and micro‐lattice materials is highlighted and a pathway for future sputter coating optimization on these complex structures is provided.

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Microalloyed medium-entropy alloy (MEA) composite nanolattices with ultrahigh toughness and cyclability

Cited by 37 publications

References 47 publications

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

A critical review of the mechanical properties of CoCrNi-based medium-entropy alloys

3D architected temperature-tolerant organohydrogels with ultra-tunable energy absorption

Coatings for Core–Shell Composite Micro‐Lattice Structures: Varying Sputtering Parameters

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