Electron Beam Melting - an overview | ScienceDirect Topics
2020-7-25 · Electron beam melting (EBM®) is a metallic printing process that has become increasingly sophisticated over the past decade. The formation of residual stress due to a high-energy electron beam is considered a primary hindrance in the maturation of the process itself and, subsequently, the quality of the printed parts. Contrary to hit and trial, the finite element method (FEM) has become a ...
Electron-Beam Melting. melting in an electron-beam furnace at a high temperature and in high vacuum. Such conditions make possible many refining reactions that are unattainable in, for example, vacuum arc melting and induction melting in crucibles made from refractory oxides. Electron-beam melting is used for the production of especially pure ...
2020-4-24 · 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
2017-10-12 · 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-
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 ...
2017-5-7 · e-beam melting for each technological regime of refining is presented in Table 2. The results show that, for the performed experiments, the best purification of Ta (99.96) is obtained during prolonged melting with low electron beam power ( = 20 min and P b = 18 kW) or during short refining with higher beam power ( = 3 min and P b = 21.6 kW ...
2013-12-17 · A bulk cylindrical high-purity nickel ingot, with purity of more than 99.999 pct (5N) in mass, was obtained from the raw nickel with 99.95 pct (3N5) initial purity by virtue of double electron beam melting (EBM). A chemical analysis was performed by using glow discharge mass spectrometry (GDMS) analysis for all elements in the periodic table except carbon, nitrogen, and oxygen, which were ...
2020-8-6 · A deflection coil assists in maintaining the electron beam oscillat-ing motion. An additional stigmator coil may help to correct aberrations of the lenses. A viewing optic or a video system allows the exact positioning of the electron beam onto the weld groove. The core piece of the electron beam welding machine is the electron beam gun
2015-6-22 · Laser Melting (SLM) and Electron Beam Melting (EBM), are successfully being used to manufacture parts from metallic materials including stainless steel, maraging steel, cobalt chromium, titanium alloys and more. In particular, additively manufactured Ti-6Al-4V parts are
2020-10-13 · The electropolishing of electron beam melting, additively manufactured TI6AL4V titanium : relevance, process parameters and surface finish. Austin Lassell University of Louisville ... other factors such that the uncommonly complex and rough AM part surface can be uniformly leveled and polished is a sizeable task that will take years of careful ...
2017-9-5 · 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).
2018-5-8 · The electron beam melting was used by Rännar et al. in order to obtain free-form cooling channels by the di-rect-metal rapid tooling method using the electron beam melting [7]. They showed that in this way some ad-vantages concerning cooling time and dimensional accu-racy could be ensured just by applying the electron beam melting.
2020-11-13 · 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 microhardness ...
2016-3-1 · The majority of the melting is performed using hatching, which can follow or precede contouring.Hatching employs a back and forth raster pattern as shown in Fig. 1b which, unlike contouring, does not use a constant beam power and velocity throughout the build.These two parameters are instead varied to attain consistent melt properties in the face of changing thermal conditions during melting.
electron beam melting (EBM) enable production of near net shaped highly complex geometries in layer by layer fashion using difficult to machine materials like Alloy 718 [1]. Alloy 718 is a precipitate strengthened NieFe based superalloy widely used in aerospace industry due to its excellent properties like high strength, high temperature
2013-8-16 · 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
2021-10-29 · Every 3D printer based on electron beam melting 3D printing technology must have: An energy source capable of emitting the electron beam. A powder container. A powder feeder. A powder re-coater. A heated build platform. Unlike any other 3D printing process that can take place in an open atmosphere, Electron beam 3D printing must take place in a ...
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} }
2018-11-1 · 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 ...
2021-9-30 · Electron beam melting (EBM) is an additive manufacturing technique that uses an electron beam to selectively fuse and consolidate the metal powder. The final object is built up layer-by-layer ...
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).
2013-11-2 · The electron beam scanni ng speed of 1000 mm/s has a cooling rate o f more than 135 and 11 times faster t han th ose of t he 100 mm/s and 500 mm /s, respectiv ely .
2021-1-1 · Electron Beam Melting. Rectangular bars were fabricated using a Arcam Q10+ EBM machine. Samples with the tensile direction acting along the build direction will be referred to as "longitudinal" samples; "transverse" samples with the tensile axis perpendicular to the build direction.
2020-1-17 · Electron Beam Melting is one of the main metal 3D printer technologies, having been commercialized by Arcam in recent years. It''s similar to Direct Metal Laser Sintering, though with one key difference we''ll explain below.. EBM falls under the Powder Bed Fusion umbrella along with DMLS and SLM, as does Selective Laser Sintering if you include plastics.
The Coupled CFD-FEM Model of Electron Beam Melting® (EBM) Mahdi Jamshidinia Southern Methodist University, [email protected] ... Heat input and cooling rate are the dominant factors
2017-5-27 · FACTORS INFLUENCING THE FLUID FLOW AND HEAT TRANSFER IN ELECTRON BEAM MELTING OF TI-6AL-4V by TAO MENG B.Eng., Huazhong University of Science and Technology, Wuhan, China, 2005 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Master of Applied Science in The Faculty of Graduate Studies （Materials …
2009-12-1 · First papers with a description of the electron beam as an energy source for direct manufacturing were published in 1992 [] 1997, patents led to the founding of the Swedish company ARCAM AB, that distributes the two systems EBM S12 and A2 [].Taminger et al. [] and Davé [] suggested the use of wire feed systems to produce parts by means of an electron beam.
Investigations are carried out and obtained experimental and theoretical data for tantalum scrap recycling by electron beam melting (EBM) is presented in this paper. Different thermal treatment process conditions are realized and results are discussed. A chemical analysis is performed and refining mechanisms for electron beam (EB) refining of Ta are discussed.
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 ...
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