Additive manufacturing titanium components with isotropic or graded properties by hybrid electron beam melting/hot isostatic pressing powder processing

Hernández-Nava, Everth; Mahoney, P.; Smith, Christopher J.; Donoghue, Jack; Todd, Iain; Tammas‐Williams, Samuel

doi:10.1038/s41598-019-40722-3

Cited by 39 publications

(19 citation statements)

References 33 publications

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“…Ti-6Al-4V components have been extensively additively manufactured for industrial applications in the fields of aerospace [ 1 , 2 , 3 ], biomedical implants [ 4 , 5 , 6 ], and automotive components [ 7 , 8 , 9 , 10 ]. EBM additive manufacturing is recognized as an effective method of producing titanium alloy structures [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Texturing and Phase Evolution in Ti-6Al-4V: Effect of Electron Beam Melting Process, Powder Re-Using, and HIP Treatment

et al. 2021

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The research demonstrates microstructural changes and development of specific texture in Ti-6Al-4V specimens produced by electron beam melting (EBM) under different conditions. The effect of two factors, namely, raw material (powder) recycling and hot isostatic pressing (HIP), on the EBM produced samples structure and properties, has been explored. The as-printed and treated samples were investigated using electron backscattered diffraction (EBSD) analysis. Modification of mechanical properties after the EBM and HIP are explained by the EBSD data on microstructural phenomena and phase transformations. The work is devoted to assessing the possibility of reusing the residual titanium alloy powder for the manufacture of titanium components by the combination of EBM and HIP methods.

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Section: Introductionmentioning

confidence: 99%

Texturing and Phase Evolution in Ti-6Al-4V: Effect of Electron Beam Melting Process, Powder Re-Using, and HIP Treatment

et al. 2021

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“…Laser additive manufacturing (LAM) technology, which builds three dimensional components by using a laser to fuse powdered materials layer by layer, offers an excellent opportunity to manufacture BMGs without dimensional constraint 7–16 . In the LAM process, metallic powders are heated and melted rapidly and periodically by a fast-moving laser beam 17 . The cooling rates of the molten metal solution can reach the values on the order of 10 3 –10 4 K/s, which is significantly higher than the critical cooling rates required to produce amorphous structures of most BMGs 18 .…”

Section: Introductionmentioning

confidence: 99%

High-throughput screening of laser additive manufactured metallic glass via ultrasonic wave

Zhai

Zhao

et al. 2019

Sci Rep

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Laser additive manufacturing (LAM) technology provides an opportunity to fabricate bulk metallic glasses (BMGs) without any dimensional constraint and achieve the large-scale applications of BMGs. However, flaws, such as cracks, gas porosity, and crystalline phases, are always formed accompanied by the process of LAM, which seriously worsens the mechanical and physical properties of the resulting BMGs. Here, we present a novel method that involves ultrasonic wave technique to high-throughput screen the optimum process parameters for the LAM of BMG. A parameter library, constituted by a series of rectangular BMG samples, is rapidly fabricated by the LAM method under continuously changed combinations of laser power and travel speed. The ultrasonic attenuation factor, which is sensitive to the flaws, is used as the monitor to screen the parameters of the BMGs fabricated by the LAM. Using this approach, the laser power of 1300 W and travel speed of 600 mm/min are estimated as the optimum parameter combination for the LAM of a Zr51Ti5Ni10Cu25Al9 (Zr51) BMG with the slightest flaws. The amorphous-phase dominated microstructure and the sufficiently high tensile strength of the subsequent fabricated large-sized Zr51 BMG sample verify this optimum parameter combination.

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“…The recent development of additive manufacturing (AM) techniques allows a larger freedom in designing parts. Various studies have been focused on manufacturing lattice structures with powder‐based AM techniques 11‐14 . This study will focus on the characterization of lattice structures made by SLM.…”

Section: Introductionmentioning

confidence: 99%

Influence of manufacturing orientations on the morphology of alloy 718 single struts manufactured by selective laser melting

Suard

Barriere

Lhuissier

et al. 2020

Mat Design & Process Comms

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Selective laser melting (SLM) is of great interest for manufacturing lightweight structures such as lattices. It allows a broad range of lattice topologies to be created. However, when manufacturing small struts, roughness, lack of dimensional accuracy, and porosity level can decrease their mechanical properties and thus affect the mechanical response of the entire structure. This study focuses on the high‐resolution characterization of alloy 718 (UNS N07718) single struts (constitutive elements of the lattice) manufactured by SLM. Process parameters, strategy, and post‐treatments remain constant while varying strut positions on the build plate and orientations. A methodology for the systematic characterization of 19 struts with high‐resolution X‐ray tomography has been developed. Different features related to the strut size, shape, waviness, roughness, and porosity are extracted. The analysis of those features when varying strut positions and orientations highlights the influence of each parameter. The build orientation is a first‐order parameter influencing strut morphology as already referenced in the literature. This systematic study reveals also the influence of the in‐plane orientation for inclined struts that alters their roughness, shape, and size.

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Additive manufacturing titanium components with isotropic or graded properties by hybrid electron beam melting/hot isostatic pressing powder processing

Cited by 39 publications

References 33 publications

Texturing and Phase Evolution in Ti-6Al-4V: Effect of Electron Beam Melting Process, Powder Re-Using, and HIP Treatment

Texturing and Phase Evolution in Ti-6Al-4V: Effect of Electron Beam Melting Process, Powder Re-Using, and HIP Treatment

High-throughput screening of laser additive manufactured metallic glass via ultrasonic wave

Influence of manufacturing orientations on the morphology of alloy 718 single struts manufactured by selective laser melting

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