Ultrastrong pure aluminum structure with gradient nanocrystals via selective pulsed laser melting: Computation framework and experiments

Branco, Danilo de Camargo; Vasconcelos, Luize Scalco de; An, Licong; Zhao, Kejie; Cheng, Gary J.

doi:10.1016/j.jmps.2021.104391

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…The number of atoms in the single-crystal, equiaxed, and columnar grain models was 144,000, 143,749, and 144,000, respectively. The average grain size of the MD model in this work was about 12 nm, which is within the range of the grain size experimentally obtained by Branco et al [17]. In addition, owing to the limitations of the calculation scale of the traditional MD method, most of the current MD simulations for polycrystalline metals have grain sizes between 10 nm and 20 nm [24,31].…”

Section: Different Crystalline State Modelssupporting

confidence: 81%

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Molecular Dynamics Simulations of the Tensile Mechanical Responses of Selective Laser-Melted Aluminum with Different Crystalline Forms

2021

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The mechanical deformation of cellular structures in the selective laser melting (SLM) of aluminum was investigated by performing a series of molecular dynamics (MD) simulations of uniaxial tension tests. The effects of crystalline form, temperature, and grain orientation of columnar grains on the mechanical properties of SLM aluminum were examined. The MD results showed that the tensile strength of SLM aluminum with columnar grains at different temperatures was lower than that of single-crystal aluminum, but greater than that of aluminum with equiaxed grains. The tensile strength and Young’s modulus both decreased approximately linearly upon increasing the temperature. The deformation mechanisms of equiaxed and columnar grains included dislocation slip, grain boundary migration, and torsion, while the deformation mechanisms of single crystals included stacking fault formation and amorphization. Finally, the influence of the columnar grain orientation on the mechanical properties was studied, and it was found that the Young’s modulus was almost independent of the grain orientation. The tensile strength was greatly affected by the columnar grain orientation. Reasonable control of the grain orientation can improve the tensile strength of SLM aluminum.

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Section: Different Crystalline State Modelssupporting

confidence: 81%

“…Recently, Branco et al [17] used pure Al as the powder material for the SLM process, and they obtained nanocrystalline pure Al with grain sizes of 9.54 nm, 42.18 nm, and 93.8 nm through a selective pulsed laser melting process. Many researchers have used MD simulations to study mechanical properties of nanocrystalline Al [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of the Tensile Mechanical Responses of Selective Laser-Melted Aluminum with Different Crystalline Forms

2021

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“…), crystalline heterogeneity (orientation, size, etc), or compositional heterogeneity (metals, polymers, ceramics, etc) [21][22][23][24][25]. As a result, these heterostructures commonly present multiproperty features, including excellent biocompatibility, antibacterial, biodegradability, magnetostriction, mechanical properties and other functionalities, etc [26][27][28][29][30], pushing their applications not only in aerospace, energy storage and precision electronics, but also in biomedical therapy as bioimplants (teeth, bones, tissue vessels and others) [31][32][33][34]. Wang et al [35] used hydrothermal method to synthesize dense SrTiO 3 -TiO 2 (nanoparticle-nanotube) heterostructured coating on Tisubstrate.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of promising heterostructure for biomedical applications

Shuai

Xiong

et al. 2023

Int. J. Extrem. Manuf.

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As a new generation of materials/structures, heterostructure is characterized by heterogeneous zones with dramatically different mechanical, physical or chemical properties. This endows heterostructure with unique interfaces, robust architectures, and synergistic effects, making it a promising option as advanced biomaterials for the highly variable anatomy and complex functionalities of individual patients. However, the main challenges of developing heterostructure lie in the control of crystal/phase evolution and the distribution/fraction of components and structures. In recent years, additive manufacturing techniques have attracted increasing attention in developing heterostructure due to the unique flexibility in tailored structures and synthetic multimaterials. This review focuses on the additive manufacturing of heterostructure for biomedical applications. The structural features and functional mechanisms of heterostructure are summarized. The typical material systems of heterostructure, mainly including metals, polymers, ceramics, and their composites, are presented. And the resulting synergistic effects on multiple properties are also systematically discussed in terms of mechanical, biocompatible, biodegradable, antibacterial, biosensitive and magnetostrictive properties. Next, this work outlines the research progress of additive manufacturing employed in developing heterostructure from the aspects of advantages, processes, properties, and applications. This review also highlights the prospective utilization of heterostructure in biomedical fields, with particular attention to bioscaffolds, vasculatures, biosensors and biodetections. Finally, future research directions and breakthroughs of heterostructure are prospected with focus on their more prospective applications in infection prevention and drug delivery.

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Plastic Deformation in Aluminum Columnar Nanograins

Dong,

Zhou

2023

JOM

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Ultrastrong pure aluminum structure with gradient nanocrystals via selective pulsed laser melting: Computation framework and experiments

Cited by 6 publications

References 37 publications

Molecular Dynamics Simulations of the Tensile Mechanical Responses of Selective Laser-Melted Aluminum with Different Crystalline Forms

Molecular Dynamics Simulations of the Tensile Mechanical Responses of Selective Laser-Melted Aluminum with Different Crystalline Forms

Additive manufacturing of promising heterostructure for biomedical applications

Plastic Deformation in Aluminum Columnar Nanograins

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