Remelt processing and microstructure of selective laser melted Ti25Ta

Brodie, Erin G.; Medvedev, Alexander E.; Frith, Jessica E.; Dargusch, Matthew S.; Fraser, Hamish L.; Molotnikov, Andrey

doi:10.1016/j.jallcom.2019.153082

Cited by 69 publications

(51 citation statements)

References 87 publications

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“…The composition for E minimization was found to be at Ti25Ta. The Ti25Ta alloy is α' phase dominated, which is the same as that reported by Brodie et al [124].…”

Section: Figure 14 E Variation Of As-quenched Ti-based Alloy With The...supporting

confidence: 88%

“…Ti42Nb (wt.%) parts were built in the study and it was found that laser re-melting strategy could enhance the part's homogeneity while maintaining the amount of keyhole porosity. The laser re-melting strategy was also studied by Brodie et al on in-situ alloyed Ti25Ta (wt.%) [124]. It was shown that the effectiveness of the re-melting strategy to approach the porosityinclusion dilemma is highly dependent on the laser parameters choice.…”

Section: Porosity-inclusion Dilemmamentioning

confidence: 99%

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In-situ alloying of beta titanium for implant application via laser powder bed fusion

Huang¹

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By manufacturing biomedical β-Ti alloys with Laser Powder Bed Fusion (LPBF), the "stress shielding" problem can be alleviated through compliance matching between bones and the implant. The "stress shielding" effect occurs when the stiffness of an implant is higher than that of the bone. This will lessen the load being bore by the bone, leading to bone resorption and ultimately implant loosening. For the author's research, manufacturing of β-Ti using LPBF was done by in-situ alloying due to its

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“…The composition for E minimization was found to be at Ti25Ta. The Ti25Ta alloy is α' phase dominated, which is the same as that reported by Brodie et al [124].…”

Section: Figure 14 E Variation Of As-quenched Ti-based Alloy With The...supporting

confidence: 88%

Section: Porosity-inclusion Dilemmamentioning

confidence: 99%

In-situ alloying of beta titanium for implant application via laser powder bed fusion

Huang¹

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“…To avoid elemental segregation, in situ alloying using L-PBF may be an alternative solution. This method uses a laser beam to fuse and form an alloy from a mixture of elemental powders directly (Brodie et al 2020). It affords flexibility and yields high-throughput productivity for the study of new materials, such as particle-reinforced metal matrix composites (Khmyrov, Safronov, and Gusarov 2017), high-entropy alloys (Sarswat et al 2019), and intermetallic compounds (Grigoriev et al 2017).…”

Section: Lack Of Fusion and Element Segregationmentioning

confidence: 99%

Recent progress and scientific challenges in multi-material additive manufacturing via laser-based powder bed fusion

Wei¹,

Li²

2021

Virtual and Physical Prototyping

156

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Multi-material additive manufacturing provides a new route for fabricating components with tailored physical properties. Laser-based powder bed fusion (L-PBF), also known as selective laser melting, is a powder bed-based additive manufacturing technology. This technology affords the advantage of manufacturing metallic and non-metallic materials with high geometrical resolution. An emerging field relevant to the foregoing is multi-material L-PBF. This paper reviews the latest progress in this field including multiple material powder deposition mechanisms, molten pool behaviour, process characteristics of printing metal-metal, metal-ceramic, and metal-polymer multiple material components, and potential applications. Finally, scientific and technological challenges are presented.

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“…Blended powder feedstocks for EB-PBF can expedite material development and reduce preparation costs, but interdiffusion between constituents remains a challenge [ 26 , 27 , 28 ]. Previous work involving L-PBF blended refractory powders with large melting point gaps have been published recently [ 29 , 30 ]. These studies suggest that there is a narrow processing window for achieving a fully solutionized microstructure (high energy requirement) without inducing keyhole porosity (low energy requirement).…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Melting of Niobium Alloys from Blended Powders

et al. 2021

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Niobium-based tungsten alloys are desirable for high-temperature structural applications yet are restricted in practice by limited room-temperature ductility and fabricability. Powder bed fusion additive manufacturing is one technology that could be leveraged to process alloys with limited ductility, without the need for pre-alloying. A custom electron beam powder bed fusion machine was used to demonstrate the processability of blended Nb-1Zr, Nb-10W-1Zr-0.1C, and Nb-20W-1Zr-0.1C powders, with resulting solid optical densities of 99+%. Ultimately, post-processing heat treatments were required to increase tungsten diffusion in niobium, as well as to attain satisfactory mechanical properties.

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Remelt processing and microstructure of selective laser melted Ti25Ta

Cited by 69 publications

References 87 publications

In-situ alloying of beta titanium for implant application via laser powder bed fusion

In-situ alloying of beta titanium for implant application via laser powder bed fusion

Recent progress and scientific challenges in multi-material additive manufacturing via laser-based powder bed fusion

Electron Beam Melting of Niobium Alloys from Blended Powders

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