Electron Beam Melting (EBM) is a metal powder bed fusion (PBF) process in which the heat source is an electron beam. Differently from other metal PBF processes, today, EBM is used for mass production. As-built EBM parts are clearly recognisable by

Electron Beam Melting: Part One. Özet: Due to an excellent refining capacity and heat source flexibility, electron beam melting is most effectively used under high vacuum and for production of ultra-pure refractory and reactive materials. The process works by the electron beam or beams, sweeping the surface of the metal ingot in a rotational ...

The high-energy electron beam selective melting (EBSM) process is supposed to be a promising technique for molybdenum because of its vacuum environment.

Electron beam melting (EBM)-fabricated porous titanium implants possessing low elastic moduli and tailored structures are promising biomaterials for orthopedic applications. However, the bio-inert nature of porous titanium makes reinforcement with growth factors (GFs) a promising method to enhance implant in vivo performance. Bone-morphogenic ...

Electron beam melting-powder bed fusion (EBM-PBF) is an additive manufacturing process, which is able to produce parts in layer-by-layer fashion from a 3D model data. Currently application of this ...

There are many factors influencing the final microstructure of additively manufactured parts. In Powder Bed Fusion (PBF) processes like Selective Laser Melting (SLM) and Electron Beam Melting (EBM), one of such factors is a build orientation of a part. To investigate an effect of the part orientation a set of samples have been manufactured via the EBM. The microstructure and …

Electron beam melting (EBM) is a type of manufacturing process that uses an energy source to recreate 3D models by melting powdered raw material. In contrast to laser-based sintering and melting processes like Selective Laser Sintering (SLS) and Laser Powder Bed Fusion (LPBF), EBM uses an electron beam, as its name implies.

during electron beam melting has been developed to examine the relative contribution of the three factors cited above on the pool profile and flow field within the pool. The model has also been used to compare the steady state solution for a time averaged circular beam pattern with a

Electron Beam Melting (EBM) is a metal powder bed fusion (PBF) process in which the heat source is an electron beam. Differently from other metal PBF processes, today, EBM is used for mass production. As-built EBM parts are clearly recognisable by their surface roughness, which is, in some cases, one of the major limitations of the EBM process.

Laser and electron-beam powder-bed additive manufacturing of metallic implants: A review on processes, materials and designs ... namely selective laser melting (SLM) and electron beam melting (EBM) are presented. Several critical design factors such as the need for data acquisition for patient-specific design, design dependent porosity for ...

Electron Beam Melting benefits from all of these factors in the same way. Compared with laser sintering/melting additional benefits include: • Higher efficiency in generating the beam of energy resulting in lower power consumption as well as lower maintenance and installation costs • High actual overall power resulting in high build speeds

particles being heated by a moving electron beam, and then melting, flowing, and finally solidifying into dense parts. This highly tran-sient evolution process is governed by mass, momentum and energy conservation. Details of the governing equations and numerical implementations can be found in our previous paper [22].Inbrief,

Electron Beam Melting (EBM), which uses an electron beam. • Selective Laser Melting (SLM), which employs a high-power laser. 2.3. Photopolymerization. This method uses a photosensitive polymeric resin that solidifies when selectively exposed to an Ultraviolet (UV) light source.

For electron beam melting of Ti-6Al-4 V, Shen and Chou modelled the powder conductivity as the sum of the k r and k s terms in eqs and (26). However, they did not say what neck radius or geometric factor Λ were assumed, or supply any actual powder conductivity values.

Electron beam melting (EBM) technology has the power to help businesses build the next generation of applications, today. Offering high productivity and lower cost per part, EBM is an innovative technology for manufacturing in the orthopedic implant and …

Electron Beam Melting: Part One. Due to an excellent refining capacity and heat source flexibility, electron beam melting is most effectively used under high vacuum and for production of ultra-pure refractory and reactive materials. The process works by the electron beam or beams, sweeping the surface of the metal ingot in a rotational movement ...

The electron beam seems to be applied first time in order to develop a welding process by J. A. Stohr, who defended a doctoral thesis and published results concern-ing electron beam welding in the in the fifties of the last century. The electron beam melting was used by Rännar et al. in order to obtain free-form cooling channels by the di-

Lassell, Austin, "The electropolishing of electron beam melting, additively manufactured TI6AL4V titanium : relevance, process parameters and surface finish." (2016).Electronic Theses and Dissertations. ... other factors such that the uncommonly complex and rough AM part surface can be uniformly leveled and polished is a sizeable task that will ...

Electron beam melting (EBM) technology has the power to help businesses build the next generation of applications, today. Offering high productivity and lower cost per part, EBM is an innovative technology for manufacturing in the orthopedic implant and aerospace industries. As a proven leader in cost-efficient Additive Manufacturing (AM ...

DOI: 10.14288/1.0068449 Corpus ID: 138714961. Factors influencing the fluid flow and heat transfer in electron beam melting of Ti-6Al-4V @inproceedings{Meng2009FactorsIT, title={Factors influencing the fluid flow and heat transfer in electron beam melting of Ti-6Al-4V}, author={T. Meng}, year={2009} }

The present study analyzes the cyclic crack propagation behavior in an austenitic steel processed by electron beam powder bed fusion (PBF-EB). The threshold value of crack growth as well as the crack growth behavior in the Paris regime were studied. In contrast to other austenitic steels, the building direction during PBF-EB did not affect the crack propagation rate, i.e., the crack growth ...

The Coupled CFD-FEM Model of Electron Beam Melting® (EBM) November 2013 ... Heat input and cooling rate are the dominant factors influencing the level of thermal stresses developed during melting ...

electron-beam melting under vacuum. For this reason, the values αi for main impurity elements have been de-termined at temperature 2400 K, which is typical for vanadium refining process. The computed values of separation factor are listed in Table 1, together with the melting points and vapor pressure of corresponding im-

The use of an electron beam as a heat source for melting metals and alloys has the advantage that very complex melting processes can be implemented, because the electron beam is deflectable and thus can reach different places on the surface of a metal block or a metal melt.

Electron beam melting (EBM) is one of the latest AM techniques using a computer-controlled electron gun to create fully dense 3D objects directly from metal powder. Like other techniques using AM, this also creates objects layer by layer (Nasr et al., 2014).EBM machines were first commercialized in approximately 1997 by the Arcam AB Corporation in Sweden (Nakao et al., 2014).

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.

EBAM is essentially electron beam melting in a vacuum ... most dominant factor to the melt pool size. However, a high thermal conductivity, (e.g., greater than 100 W/m-K), will become the dominant factor, exceeding the melting temperature effect, for the melt pool size. The latent heat of fusion and the specific heat

In the EBM process, instead of a laser beam, an electron beam is generated via a tungsten filament in an electron gun, as shown in Fig. 2. The powder bed is first pre-heated using a defocused electron beam in order to enhance the conductivity and cohesion …

Among the others, the electron beam melting (EBM) is one of the most promising ALM technologies, which utilizes a high-energy electron beam, as a moving heat source, in order to melt and fuse (by rapid self-cooling) metal powder and produce parts in a layer-building fashion (Ref 2, 3).

Electron Beam Melting. Electron beam melting is distinguished by its superior refining capacity and offers a high degree of flexibility of the heat source and the distribution of power. Thus it is ideal for remelting and refining of metals and alloys under high vacuum …

Electron Beam Melting uses a high-power electron beam to melt the metal powder. This electron beam is managed through electromagnetic coils which allow for extremely fast and accurate beam control. In addition, this allows several different 'melt pools' (different objects within the same build at the same time) to be maintained simultaneously.

second laser beam to influence the vicinity of the melt pool in the SLM process, but similar strategies are known from bifocal-hybrid-welding [6] or electron beam welding/melting in which the electron beam can be deflected with very high speeds so that multiple spots can be maintained [7, 8, 9].

5.2. Electron beam melting (EBM) Another metal AM technique that is being widely employed to manufacture implants is Electron Beam Melting . Since it involves melting a powder bed using an electron beam as the energy source, the whole process is carried out in a vacuum chamber .

Electron Beam Melting (EBM) is one of a few Additive Manufacturing (AM) technologies capable of making full-density functional metallic parts. In particular, the ability of direct fabrications of metallic parts can accelerate product designs and developments in a wide range of metallic-part applications, especially for complex components, e.g ...