Data related to the sinter structure analysis of titanium structures fabricated via binder jetting additive manufacturing

Wheat, Evan; Vlasea, Mihaela; Hinebaugh, James; Metcalfe, Craig

doi:10.1016/j.dib.2018.08.135

Cited by 12 publications

(2 citation statements)

References 2 publications

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“…The results showed that porous cellular Ti structures with variable porosity could be successfully manufactured, with the same mechanical strength behavior under compression stress being achieved. The connection between theory of sintering and process results was the main topic of another work by evan et al [9]. Furthermore, the current study provides further insights into the subject matter, building upon the authors' previous publication [7] which focused on the characterisation of sintered structures in commercially pure titanium components produced by powder bed binder jetting additive manufacturing.…”

Section: Titanium Based Powdersmentioning

confidence: 64%

A Review on Metal Binder Jetting 3D Printing

Venukumar,

Cheepu,

Kantumunchu

et al. 2023

E3S Web Conf.

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Binder jetting (BJ) is one of the major metal additive manufacturing (AM) technology used for the production of intricate metal components using a layer-by-layer approach. It belongs to the more general family of processes known as powder bed fusion procedures, in which a bed of metal powder is first selectively fused together with the help of a binder and then sintered in order to produce the final metal component. Binder Jetting is the sole non-fusion-based powder bed additive manufacturing technology; this means that, unlike laser-based AM procedures, the resulting parts are completely free of residual stresses. Small to medium batch production can be cost-effective due to lower tooling and setup expenses. This analysis focuses on the capacity of some of the most important engineering materials, including titanium, Inconel and stainless steel, to produce intricate geometries with a high degree of precision and accuracy. These materials find extensive use across many applications, including defence, industry, biomedical, aerospace, and other fields.

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Section: Titanium Based Powdersmentioning

confidence: 64%

A Review on Metal Binder Jetting 3D Printing

Venukumar,

Cheepu,

Kantumunchu

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…Sheydaeian et al investigated the MBJ of CP-Ti, emphasizing the complexities associated with particle segregation during powder deposition and anisotropic shrinkage during sintering [18]. Wheat et al's findings confirmed these challenges, using computer tomography to visualize how particle size distribution affected the density and microstructure of green and sintered CP-Ti samples [19]. Polozov et al attempted to fabricate Ti-22Al-25Nb alloy via the MBJ of mixed elemental powders, high-temperature reactive sintering (800-1100 • C), and subsequent annealing at 1400 • C. The resulting microstructure showcased a B2/β-phase with acicular Ti2AlNb precipitates [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Powder Conditioning Strategies on Metal Binder Jetting with Ti-6Al-4V

Janzen,

Kallies,

Waalkes

et al. 2024

Materials

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Metal binder jetting shows great potential for medical technology. This potential can be exploited by integrating binder jetting into existing process routes known from metal injection molding. The biggest challenge here is the flowability and packing behavior of the powders used, due to their low size distributions. This paper investigates different powder-drying strategies to improve flowability using a statistical experimental design. Because of its relevance for medical applications, spherical Ti-6Al-4V powder with a size distribution under 25 µm is dried under various parameters using vacuum and gas purging. The investigated parameters, time and temperature, are selected in a central-composite-circumscribed test plan with eleven tests and three center points. The target parameters—water content, flowability and impurity levels (oxygen, nitrogen)—of the powder are analyzed. For validation, practical test trials are carried out on an industrial binder jetting system with unconditioned powder and conditioning with optimized parameters, comparing the manufactured parts and the powder bed. An optimized drying cycle with a duration of 6 h at 200 °C was determined for the investigated powder. Significant improvements in the dimensional accuracy (from ±1.5 to 0.3%) of the components and the visual impression of the powder bed are demonstrated.

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Microstructural development during additive manufacturing of biomedical grade Ti-6Al-4V alloy by three-dimensional binder jetting: material aspects and mechanical properties

Simchi

Petzoldt

Hartwig

et al. 2023

Int J Adv Manuf Technol

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Additive manufacturing (AM) of biomedical materials provides enormous opportunities to fabricate multifunctional and structurally designed frameworks for tissue engineering, such as dental implants and bone substitutes. Despite several advantages of the binder jet 3D printing technology over other AM methods, the fabrication of biomedical-grade titanium alloys with high-density, ne microstructure, and low pickup of impurities is still challenging. This work presents the effects of powder particle size and 3D printing conditions on the microstructural features and mechanical properties of Ti-6Al-4V alloy. The formation of large and inter-aggregate pores during binder jetting is demonstrated and discussed. Design and selection of particle size distribution with a mean diameter of ~20 µm and large span and positive skewness are proposed to minimize binder-induced powder aggregation and fabricate green parts with a density of 65±1 % PFD (pore-free density). Dilatometric studies under a partial pressure of argon (0.1 bar) determine that sintering just above the a/b tarsus (~1050 °C) provides a high strain rate to remove pores, but high-temperature sintering (³1250 °C) is required to attain 97 % PFD. The successful fabrication of high-density Ti-6Al-4V parts (³96 % PFD) with the microstructure comparable to metal injection molding (MIM) titanium parts (»100 µm α grains + β lattes) is demonstrated. The tensile strength and elongation fall in the range of 880±50 MPa and 6±2 %, depending on the processing condition. The content of carbon (<0.02 wt.%) and nitrogen (0.01 wt.%) also falls in the standard region of metal injection molding parts. However, oxygen pickup during sintering moderately increases the oxygen content (for 30-50 %) over the standard level. The concentration of interstitials entrapped in the metal is comparable to that of parts manufactured by the powder bed fusion process, but the mechanical properties are better matched with the commercial titanium alloy. The fabrication of the titanium alloy as per the ASTM F2885 standard provides an excellent opportunity for the binder jetting process to develop custom-made biomaterials.

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Data related to the sinter structure analysis of titanium structures fabricated via binder jetting additive manufacturing

Cited by 12 publications

References 2 publications

A Review on Metal Binder Jetting 3D Printing

A Review on Metal Binder Jetting 3D Printing

Influence of Different Powder Conditioning Strategies on Metal Binder Jetting with Ti-6Al-4V

Microstructural development during additive manufacturing of biomedical grade Ti-6Al-4V alloy by three-dimensional binder jetting: material aspects and mechanical properties

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