Ultrafine eutectic Ti-Fe-based alloys processed by additive manufacturing – A new candidate for high temperature applications

Gussone, Joachim; Bugelnig, Katrin; Barriobero-Vila, Pere; Silva, Júlio César da; Hecht, U.; Dresbach, Christian; Sket, F.; Cloetens, Peter; Stark, Andreas; Schell, Norbert; Haubrich, Jan; Requena, Guillermo

doi:10.1016/j.apmt.2020.100767

Cited by 30 publications

(23 citation statements)

References 35 publications

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“…The directional solidification of nonfaceted eutectic alloys delivers self-organized composite materials of great interest for advanced applications [1,2,3,4]. Their multiphased microstructures arise from a complex nonequilibrium pattern formation process at the growth front [5,6], some basic features of which are still poorly understood [7,8].…”

Section: Introductionmentioning

confidence: 99%

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Bottin-Rousseau

Medjkoune

Senninger

et al. 2021

Journal of Crystal Growth

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We investigated the directional-solidification dynamics of slightly hypoeutectic Al-Al 2 Cu alloys in thin samples. Our goal was to establish a link between the growth of locked, tilted-lamellar patterns and the crystal orientation relationship (OR) between the Al-rich solid solution α and the Al 2 Cu intermetallic θ, as well as to gain information on the OR-dependent anisotropy of the surface energy γ of the α-θ interphase boundaries. Thin Al-Al 2 Cu films of thickness of 13 ± 2 µm were prepared by plasma sputtering. During solidification at pulling velocities between 0.05 and 0.5 µms −1 , the coupled-growth front was observed in situ with a long-distance optics. The growth of millimeter-sized eutectic grains was thus followed in real time during transient and steady-state regimes. The orientation of α and θ crystals was measured ex situ by x-ray diffraction and electron backscattering diffraction. In several eutectic grains, a {123} α plane and a {100} θ plane were found to be closely parallel to each other. These coincident planes define a new family of (type-C) ORs in the Al-Al 2 Cu eutectic, which are distinct from the prevailing ORs that have been previously identified in bulk samples. Crucially, the inclination of the lamellae was systematically close to that of a {100} θ lattice plane, which therefore corresponds to a deep γ minimum in eutectic grains with a type-C OR, or a neighbor one. We initiated a discussion on the selection of the OR, the formation of "stray" eutectic grains, and the lamellar-growth dynamics at eutectic-grain boundaries.

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Section: Introductionmentioning

confidence: 99%

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Bottin-Rousseau

Medjkoune

Senninger

et al. 2021

Journal of Crystal Growth

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“…Ultrafine eutectic Ti-Fe alloys can gain strength above 2.5 GPa in room temperature and compressive ductility above 10% [24]. In these alloys, grain sizes commonly decrease with increasing growth velocity or cooling rate.…”

Section: Researches In the Fields Of Additive Laser Manufacturingmentioning

confidence: 99%

“…This allows significant size-hardening effects and opens a gateway to materials design by rapid solidification techniques. The study presented by Gussone et al [24] provides the first demonstration of the feasibility of producing eutectic and near-eutectic Ti-Fe alloys by LAM with ultrafine microstructures and mechanical strength as well as compressive ductility attractive for structural applications.…”

Section: Researches In the Fields Of Additive Laser Manufacturingmentioning

confidence: 99%

Possible Applications of Additive Manufacturing Technologies in Shipbuilding: A Review

Ziółkowski

Dyl

2020

Machines

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3D printing conquers new branches of production due to becoming a more reliable and professional method of manufacturing. The benefits of additive manufacturing such as part optimization, weight reduction, and ease of prototyping were factors accelerating the popularity of 3D printing. Additive manufacturing has found its niches, inter alia, in automotive, aerospace and dentistry. Although further research in those branches is still required, in some specific applications, additive manufacturing (AM) can be beneficial. It has been proven that additively manufactured parts have the potential to out perform the conventionally manufactured parts due to their mechanical properties; however, they must be designed for specific 3D printing technology, taking into account its limitations. The maritime industry has a long-standing tradition and is based on old, reliable techniques; therefore it implements new solutions very carefully. Besides, shipbuilding has to face very high classification requirements that force the use of technologies that guarantee repeatability and high quality. This paper provides information about current R&D works in the field of implementing AM in shipbuilding, possible benefits, opportunities and threats of implementation.

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“…In this context, several studies were conducted for a deeper understanding control of the effects that currently limit the fidelity of LPBF as a microstructure, residual stress, micro-roughness and porosity of AM materials. Simonelli et al [16] investigated the influence of Fe on the microstructural development of Ti-6Al-4V used for LPBF, and Gussone et al [17] demonstrated the feasibility of Ti-Fe alloys used for LPBF with ultrafine microstructures and mechanical strength for structural application. In [18] and [19], the authors provide a brief overview of alloy design strategies, highlighting the potential for alloys to match to the unique processing conditions encountered during the AM process.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Closed Impeller for Mechanically Pump Fluid Loop Systems Using Selective Laser Melting Additive Manufacturing Technology

et al. 2021

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In the space industry, the market demand for high-pressure mechanically pumped fluid loop (MPFL) systems has increased the interest for integrating advanced technologies in the manufacturing process of critical components with complex geometries. The conventional manufacturing process of a closed impeller encounters different technical challenges, but using additive manufacturing (AM) technology, the small component is printed, fulfilling the quality requirements. This paper presents the Laser Powder Bed Fusion (LPBF) process of a closed impeller designed for a centrifugal pump integrated in an MPFL system with the objective of defining a complete manufacturing process. A set of three closed impellers was manufactured, and each closed impeller was subjected to dimensional accuracy analysis, before and after applying an iterative finishing process for the internal surface area. One of the impellers was validated through non-destructive testing (NDT) activities, and finally, a preliminary balancing was performed for the G2.5 class. The process setup (building orientation and support structure) defined in the current study for a pre-existing geometry of the closed impeller takes full advantages of LPBF technology and represents an important step in the development of complex structural components, increasing the technological readiness level of the AM process for space applications.

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Ultrafine eutectic Ti-Fe-based alloys processed by additive manufacturing – A new candidate for high temperature applications

Cited by 30 publications

References 35 publications

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Locked-lamellar eutectic growth in thin Al-Al2Cu samples: In situ directional solidification and crystal orientation analysis

Possible Applications of Additive Manufacturing Technologies in Shipbuilding: A Review

Manufacturing of Closed Impeller for Mechanically Pump Fluid Loop Systems Using Selective Laser Melting Additive Manufacturing Technology

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