Mechanical behaviors and failure modes of additive manufactured Ti6Al4V lattice structures under compressive load

Li, PeiYao; E., Yu; Sun, Wenbo; Qian, Xudong; Zhang, Weihong; Wang, Zhenhai

doi:10.1016/j.tws.2022.109778

Cited by 25 publications

(2 citation statements)

References 53 publications

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“…[5,6] Ti-6Al-4V has excellent properties such as high specific strength and corrosion resistance and has broad application prospects in the field of metallic AM. [7,8] Traditional uniform lattice structures such as simple cubic, body-centered-cubic (BCC), face-centered-cubic (FCC), and their derivatives have been extensively studied and applied. [9] However, these lattice structures have certain limitations in terms of mechanical performance and energy absorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Deformation Behaviors of Layered‐Hybrid Lattice Structure Fabricated by Selective Laser Melting

Ren,

Liu,

Cai

et al. 2023

Adv Eng Mater

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Three types of layered‐hybrid lattice structures (LHLSs) with different layer thickness composed of body‐centered cubic (BCC) and face‐centered cubic (FCC) unit cells were designed and manufactured by selective laser melting using Ti‐6Al‐4V powder. The microstructure and surface morphologies of the three types of the SLM‐formed LHLSs were examined by optical microscope and scanning electron microscope, respectively. Quasi‐static compression experiments were carried out to investigate the mechanical properties. The results showed that the layer thickness had a significant effect on the mechanical properties and deformation behaviors. The elastic modulus, yield strength and ultimate compressive strength of LHLS increased with the increasing of BCC and FCC layer thickness, respectively. Based on the observations of deformation process, a 45° shear band and axial fracture were observed in LHLS‐8; and step‐like deformation bands were observed in both LHLS‐4 and LHLS‐2 samples. Besides, the influence of different loading directions on mechanical properties was also investigated, it was found that the ultimate compressive strength loaded in the transverse direction was independent of the layer thickness in LHLSs.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Deformation Behaviors of Layered‐Hybrid Lattice Structure Fabricated by Selective Laser Melting

Ren,

Liu,

Cai

et al. 2023

Adv Eng Mater

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“…Lattice structures are cellular materials composed of interconnected strut networks, nodes, and unit cells by different topologies 19 , which affect the mechanical properties of lattice structures. The uniform lattice structures with repetitive unit cells lead to uniform mechanical properties in the metallic lattice structures 21,24,25 .…”

Section: Introductionmentioning

confidence: 99%

Microstructural and mechanical characterization of Al/Cu interface in a bimetallic composite produced by compound Casting

Salout,

Mirbagheri

2023

Preprint

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The bimetal set (Al/Cu) with Cu wire with 2.0, 2.5, and 3.0 mm diameters were cast at different casting temperatures and solidification times through the compound casting method. The microstructure of solid/liquid diffusion bonding at the Al/Cu interface was investigated, and the shear strength of the Al/Cu interface was measured by punch test. By characterizing the diffusion layer, the optimum parameters of the compound casting, including the casting temperature and the solidification soaking time, as well as the Cu wire diameter, were acquired. The intermetallic compounds (IMCs) such as CuAl2, CuAl, and Cu9Al4 were observed in the diffusion layer. The types of intermetallic phases and diffusion layer thickness affect the hardness and the shear strength. The result of casting at 680°C and solidification soaking time of 15 s for 3 mm Cu wire, shows that IMCs increased the micro-hardness of the Al/Cu bimetal up to 328 HV at the Al/Cu interface. Also, increasing the solidification soaking time at a constant temperature resulted in a growth of the interface layer’s thickness, which exhibits a lamellar eutectic microstructure containing IMCs. Furthermore, this action caused an increase in the shear strength.

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Unprecedented Strength Enhancement Observed in Interpenetrating Phase Composites of Aperiodic Lattice Metamaterials

Wang,

Li,

Deng

et al. 2024

Adv Funct Materials

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Simultaneous high strength and high toughness are highly sought‐after in lattice metamaterials, but these properties are typically mutually exclusive. To overcome this challenge, the development of interpenetrating phase composite (IPC), which incorporates a net matrix infill into the lattice, has shown great potential in overcoming these constraints and is thus of continuous practical interest. In this work, a novel aperiodic monotile truss lattice and polymer IPC that exhibit unprecedented enhancement in both strength and toughness are reported. Specifically, the aperiodic unit cell is inspired by Einstein's monotile, a single space‐filling shape where the cell orientation never repeats. The IPCs are achieved through 3D‐printed Ti‐6Al‐4V truss lattices and epoxy infiltration. The highest gain in compressive strength reveals an impressive 246.61% increase, significantly exceeding the “1 + 1 > 2” idealization typically associated with strength in IPC metamaterials. Furthermore, a high specific energy absorption of 46.2 J g−1 demonstrates superior toughness. The underlying mechanisms, including damage sequences, two‐phase interactions, and geometric effects between truss and epoxy, are fully elucidated. Overall, this work reports unprecedented enhancement in IPC's properties and demonstrates the potential of utilizing idealized structures to achieve an optimal combination of strength and toughness in mechanical metamaterials.

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Mechanical behaviors and failure modes of additive manufactured Ti6Al4V lattice structures under compressive load

Cited by 25 publications

References 53 publications

Mechanical Properties and Deformation Behaviors of Layered‐Hybrid Lattice Structure Fabricated by Selective Laser Melting

Mechanical Properties and Deformation Behaviors of Layered‐Hybrid Lattice Structure Fabricated by Selective Laser Melting

Microstructural and mechanical characterization of Al/Cu interface in a bimetallic composite produced by compound Casting

Unprecedented Strength Enhancement Observed in Interpenetrating Phase Composites of Aperiodic Lattice Metamaterials

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