Additive layer manufacturing of titanium matrix composites using the direct metal deposition laser process

Pouzet, Sébastien; Peyre, P.; Gorny, Cyril; Castelnau, Olivier; Baudin, Thierry; Brisset, François; Colin, Christian; Gadaud, P.

doi:10.1016/j.msea.2016.09.002

Cited by 107 publications

(29 citation statements)

References 17 publications

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“…A large and growing body of literature investigated the correlation between some specific process parameters, microstructure, and mechanical properties of the final components. Although, the relationship between these findings and the fabrication of complicated components with different shapes is not still clear [54][55][56][57][58][59][60][61].…”

Section: Microstructurementioning

confidence: 99%

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

et al. 2017

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The directed energy deposition (DED) process can be employed to build net shape components or prototypes starting from powder or wires, through a layer-by-layer process. This process provides an opportunity to fabricate complex shaped and functionally graded parts that can be utilized in different engineering applications. DED uses a laser as a focused heat source to melt the in-situ delivered powder or wire-shaped raw materials. In the past years extensive studies on DED have shown that this process has great potential in order to be used for (i) rapid prototyping of metallic parts, (ii) fabrication of complex and customized parts, (iii) repairing/cladding valuable components which cannot be repaired by other traditional techniques. However, the industrial adoption of this process is still challenging owing to the lack of knowledge on the mechanical performances of the constructed components and also on the trustworthiness/durability of engineering parts produced by DED. This manuscript provides an overview of the additive manufacturing (AM) of titanium alloys and focuses in particular on the mechanical properties and microstructure of components fabricated by DED.

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Section: Microstructurementioning

confidence: 99%

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

et al. 2017

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“…The constitutive material considered is a Ti-6Al-4V titanium alloy, with elastoplastic behavior, i.e., strain rate independent, and material modeling parameters identified from tensile experiments available in the literature [90]: E = 97 GPa, ν = 0.3, σ Y = 759 MPa, Q 1 = 331 MPa, b 1 = 332, Q 2 = 259 MPa, and b 2 = 5.8.…”

Section: Extension To Elastoplasticitymentioning

confidence: 99%

Computational Investigation of the Effective Mechanical Behavior for 3D Pre-Buckled Auxetic Lattices

Albertini

Dirrenberger

Molotnikov

et al. 2019

Journal of Applied Mechanics

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Negative Poisson's ratio materials, or auxetics, have drawn attention for the past 30 years. The auxetic effect could lead to improved mechanical properties such as acoustic damping, indentation resistance, or crashworthiness. In this work, two 3D auxetic lattices are introduced. Auxeticity is achieved by design through pre-buckling of the lattice struts. The influence of geometrical parameters on the effective elastic properties is investigated using computational homogenization method with periodic boundary conditions. Effective Young's modulus is 3D mapped to reveal anisotropy and identify spatial orientations of interest. The effective Poisson ratio is computed for various geometric configurations to characterize auxeticity. Finally, the influence of effective elastic properties on energy dissipation under compression is explored for elastoplastic lattices with different loading directions, using finite element simulations. Results suggest that loading 3D auxetic lattices along their stiffest direction maximizes their crashworthiness.

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“…The movement of the laser beam solidifies the molten pool and forms a deposited layer with full-density, crack-free deposit, and full-strength fusion bond to the substrate under appropriate operating conditions [6]. This process has been used for the direct fabrication of metal parts, surface coating, and repairing damaged components [7][8][9], and can also be used to produce functional-gradient materials [10,11] and composite materials [12,13], both of which cannot be fabricated via conventional means. Many pieces of research focused on the process, microstructure, and properties of LSF technology [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Method to Detect the Deformation Behavior during Laser Solid Forming of Thin-Wall Structure

Tan

Chen

Feng

et al. 2020

Metals

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Laser solid forming (LSF) is a promising additive manufacturing technology. In the LSF process, deformation behaviors dictate the accuracy of the produced parts. In this study, by using a laser displacement detector based on laser triangulation principle, an accurate and effective real-time detection method was established to monitor the real-time deformation behavior of the key position during the LSF of a thin-wall structure. The results confirmed that increasing thin-wall length results in increasing final deformation of the edge. The displacement fluctuation range and value in the middle of thin wall are both smaller than that of the positions near the end, while the entire displacement changing direction in the middle is opposite to that of the end positions. When the deposition process is paused, the deformation of the thin wall during the cooling stage will deviate the position of the deposited thin wall, resulting in the dislocation between the subsequent deposited part and that before the pause, which affect the dimensional accuracy of the thin wall structure. This non-contact real-time detection method also confirmed the ability to monitor the initiation of cracking during the LSF process, and a potential to be used for the on-line feedback control of deformation of detected key position of deposited structure.

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Additive layer manufacturing of titanium matrix composites using the direct metal deposition laser process

Cited by 107 publications

References 17 publications

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

An Overview of Additive Manufacturing of Titanium Components by Directed Energy Deposition: Microstructure and Mechanical Properties

Computational Investigation of the Effective Mechanical Behavior for 3D Pre-Buckled Auxetic Lattices

A Real-Time Method to Detect the Deformation Behavior during Laser Solid Forming of Thin-Wall Structure

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