On the role of building orientation and surface post-processes on the fatigue life of Ti-6Al-4V coupons manufactured by laser powder bed fusion

Cutolo, Antonio; Elangeswaran, Chola; Muralidharan, Gokula Krishna; Hooreweder, Brecht Van

doi:10.1016/j.msea.2022.142747

Cited by 16 publications

(6 citation statements)

References 37 publications

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“…In Figure 4 b,c, the two tissues shown in Figure 4 a were observed in 400× magnification, respectively, to obtain high-resolution photos of the two tissues. Finally, the selection area in Figure 5 c was observed under SEM to further calibrate the distribution of the structure [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Ti6Al4V Alloy Remelting by Modulation Laser: Deep Penetration, High Compactness and Metallurgical Bonding with Matrix

et al. 2022

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Titanium alloys are famous for their light weight, high strength, and heat- and corrosion-resistant properties. However, the excellent mechanical properties are closely related to its microstructure. Innovative machining operations are required for the welding, surface strengthening, and repairs to ensure the refining of the crystalline structure for improved strength requirements, enhanced mechanical properties, and integrating strength. By direct laser melting on the surface of Ti-6Al-4V alloy, the differences of molten pools under continuous and modulated laser mode were compared in the article. Under the same power, the heat influence zone of the laser pool could be reduced to 1/3 of that of the continuous laser. The deep molten pool could be obtained by a continuous laser by the action of high energy density. The tensile property changed a lot between different depths of melt penetration. A high-density, fine-grain molten pool could be obtained under the action of a high-frequency (20 kHz) modulation laser. The mechanical properties of the tensile sample between different depths of melt penetration, which contained the remelting zone, were close to the substrate. The research conclusions can provide technical support for the development of laser remelting processing technology.

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Section: Resultsmentioning

confidence: 99%

Ti6Al4V Alloy Remelting by Modulation Laser: Deep Penetration, High Compactness and Metallurgical Bonding with Matrix

et al. 2022

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“…A plausible explanation for this phenomenon is attributed to the orientation dependency of defects dictated by the different processing conditions [5]. Furthermore, it is widely reported in the literature, that horizontally printed samples present higher surface roughness compared to diagonal and vertical ones [5,13,14]. Therefore, the differences in porosity and surface roughness are likely to be the main reasons for the difference in elongation.…”

Section: Single Strut Materials Propertiesmentioning

confidence: 95%

A Multiscale Study of the Interconnection Between Unit Cell Design, Processing Conditions, Microstructure, and Mechanical Properties of Additively Manufactured Titanium Metamaterials

Casata

Garrido

Alabort³

et al. 2023

The Minerals, Metals &Amp; Materials Series

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Additive Manufacturing technologies, such as Laser Powder Bed Fusion, have enabled the creation of complex geometrical designs which can be used for lightweighting purposes across multiple industries. One of the most common methods to reduce weight in the design stage is the use of topological optimization or lattice structures. Lattice structures consist of nodes connected with struts in different orientations in space, with the configuration of the unit cell varying depending on the final application. It is an established fact that the mechanical properties of additively manufactured components vary as a function of the size and orientation of the printed part. This inhomogeneity in properties is often neglected by material models implemented in finite element analysis, which normally just consider the mechanical properties of the bulk material. In this work, single struts of different diameters (0.5 mm and 1 mm) and orientations (0° and 45°) were tested to determine the corresponding mechanical properties and use them as an input to construct a material model to predict the mechanical properties of lattice structures. Validation against experimental behavior of two different lattice structures shows improved accuracy over bulk properties material models.

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“…12. High Diagrams (a) and normalized Haigh diagrams over experimental yield strength (b) for Ti6Al4V L-PBF 90•strut specimens at 10 6 cycles comparing the data from this study (blue hexagons) with literature data from[19] (pink hexagons, 0.6 mm nominal diameter),[39] (orange circles, 4 mm nominal diameter),[41,69] (purple left-oriented triangle, nominal diameter 2.5 mm),[70] (yellow right-oriented triangles, 6 mm nominal diameter) and[71] (green square, 6 mm nominal diameter). Data reported in this graph refers to L-PBF specimens which have undergone comparable stress relieving and annealing heat treatment.…”

mentioning

confidence: 91%

Influence of Mean Stress and Building Orientation on the Fatigue Properties of Sub-Unital Thin-Strut Miniaturized Ti6al4v Specimens Additively Manufactured Via Laser-Powder Bed Fusion

Murchio¹,

Plessis

Luchin³

et al. 2023

Preprint

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On the role of building orientation and surface post-processes on the fatigue life of Ti-6Al-4V coupons manufactured by laser powder bed fusion

Cited by 16 publications

References 37 publications

Ti6Al4V Alloy Remelting by Modulation Laser: Deep Penetration, High Compactness and Metallurgical Bonding with Matrix

Ti6Al4V Alloy Remelting by Modulation Laser: Deep Penetration, High Compactness and Metallurgical Bonding with Matrix

A Multiscale Study of the Interconnection Between Unit Cell Design, Processing Conditions, Microstructure, and Mechanical Properties of Additively Manufactured Titanium Metamaterials

Influence of Mean Stress and Building Orientation on the Fatigue Properties of Sub-Unital Thin-Strut Miniaturized Ti6al4v Specimens Additively Manufactured Via Laser-Powder Bed Fusion

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