Electron beam sintering of ultra-high-temperature ceramic material of zirconium diboride (ZrB 2) was successfully carried out. Scanning electron microscopy images showed that the sintered layer had smooth surface morphology. Significant grain
In this paper, the effect of rare earth Ce on the corrosion resistance of Al-20SiC composites treated with high-current pulsed electron beams is investigated, and the corresponding corrosion mechanism is proposed. The scanning electron microscope (SEM) results show that cracks arise on the surface of Al-20SiC composites prepared by
2 Electron beam sintering The functional principle of the eb sintering is comparable to the laser sintering technologies. Figure 1 shows the eb J. Milberg acatech, Residenz Mu¨nchen Hofgartenstr. 2, 80539 Mu¨nchen, Germany M. Sigl (&) Institute for Machine
Among direct metal processing manufacturing technologies (Rapid Manufacturing), Electron Beam Sintering (EBS) exhibits a high application potential. Especially, the fast beam
The electron beam (eb) technology offers higher power density and beam velocity and therefore seems more suitable for sintering high-tensile steel powder in an economic
Selective electron beam melting (SEBM) is a relatively new additive manufacturing technology for metallic materials. Specific to this technology is the sintering of the metal powder prior to the melting process. The sintering process has disadvantages for post-processing. The post-processing of parts produced by SEBM typically involves
Preheating is an essential process step in electron beam powder bed fusion. It has the purpose of establishing a sintered powder bed and maintaining an elevated temperature. The sintered powder bed reduces the risk of smoke and in combination with the elevated temperature improves the processability. Today, the line
Abstract. Electron Beam Powder Bed Fusion (PBF-EB) allows not only for the additive manufacturing of fully dense metallic components via melting but also parts with defined local pore structures and tailored functional properties through selective sintering. The hybrid PBF-EB technology based on the combination of selective sintering and
M. F. Zäh, S. Lutzmann*, M. Kahnert and F. Walchshäusl iwb Anwenderzentrum Augsburg. *Corresponding author: iwb Anwenderzentrum Augsburg, TU München, Beim Glaspalast 5, 86153 Augsburg, Germany, [email protected] . Abstract: Additive Layer Manufacturing (ALM) methods, like Electron Beam Sintering (EBS) constitute an
In recently developed Additive Manufacturing (AM) technologies, high-energy sources have been used to fabricate metallic parts, in a layer by layer fashion, by sintering and/or melting metal powders. In particular, Electron Beam Additive Manufacturing (EBAM) utilizes a high-energy electron beam to melt and fuse metal
Abstract The influence of the rate of sintering by electron beam sintering (EBS) and spark plasma sintering (SPS) methods on the formation of the microstructure and properties of a 90 wt % WC + 10 wt % FeCrNiWMo composite is studied. The effect of technological parameters of sintering on structure formation and phase composition of a
Among direct metal processing manufacturing technologies (Rapid Manufacturing), Electron Beam Sintering (EBS) exhibits a high application potential. Especially, the fast beam
Titanium alloy Ti6Al4V manufactured by additive manufacturing (AM) is an attractive material, but the fatigue strength of AM Ti6Al4V is remarkably weak. Thus, post-processing is very important.
The electron beam (eb) technology offers higher power density and beam velocity and therefore seems more suitable for sintering high-tensile steel powder in an economic way. In this paper, a comprehensive method is implemented to develop the eb sintering. In comparison to laser-based applications, different physical effects occur and have to be
Transient Physical Effects in Electron Beam Sintering. M. Sigl, S. Lutzmann, M. Zaeh. Published 14 September 2006. Engineering, Materials Science, Physics. The extensive use of the electron beam in manufacturing processes like welding or perforating revealed the high potentials for also using it for solid freeform fabrication.
This paper primarily discusses the current capabilities and future trends of Electron Beam Technology (EBT), which is a metal additive manufacturing (AM) process. EBT, comparatively a young technology, is used to produce whole metallic components directly from the electronic data of the desired geometry. Its applications have extended
In this study, we have firstly proposed a high-speed electron beam sintering technique for producing fully dense submicron-grained WC-8Co hardmetals. A distinctive feature of the sintering process
Electron-beam sintering was performed on the vacuum unit, Fig. 2, equipped with a fore-vacuum plasma-cathode electron source and necessary measuring instrumentation. We used a hollow-cathode discharge plasma electron source capable of generating a continuous electron beam in the pressure range 5–30 Pa.
Similarly, Zaeh et al., investigated the effect of scanning strategy in the fabrication of components using electron beam sintering. They used different scan Fig. 3 Geometrical defects in metal AM
The electron beam (eb) technology offers higher power density and beam velocity and therefore seems more suitable for sintering high-tensile steel powder in an
Layer-by-layer electron-beam irradiation of a mixture of aluma ceramic and talc powders allows sintering multilayer samples. The optimum temperature for heating the powder mixture is 1350 °C. Electron beam heating to this temperature leads to sintering of one layer of powder. The subsequent layers are formed by sintering in the
Additive Layer Manufacturing (ALM) methods, like Electron Beam Sintering (EBS) constitute an interesting process concerning the production of small series and customised products. However, transient effects occur during processing due to the different physical principles of an electron beam (EB). Thus, process knowledge from similar ALM
Therefore, electron beam sputtering caused by the energy transfer of deflected electrons plays an important role in driving the sintering of nanoparticles. To estimate the electron beam sputtering effect, a model based on electron scattering was applied to determine the energy E t transmitted through electron atom collisions, which
We describe our studies of the influence of Cr content in an Al2O3-Cr composite on its thermal and electrical conductivity properties during and after electron-beam sintering in the forevacuum range of
Diagram 1: Results of experiments depending on beam power and frequency. By the qualitative evaluation (figure 4) the parameter range can be classified in good (10) and bad (0) test results. The preheating process was kept constantly at a powder temperature between 800° C and 900° C.
Electron beam melting (EBM) is a powder bed fusion process that employs an electron beam to selectively melt layers of metal powder. In this chapter, the
This paper presents an effort to process UHTCs using an additive manufacturing method, specifically Electron Beam Sintering (EBS) - adoption of the
Layer Formations in Electron Beam Sintering. Among direct metal processing manufacturing technologies (Rapid Manufacturing), Electron Beam Sintering (EBS) exhibits a high application potential. Especially, the fast beam deflection provided by electromagnetic lenses allows the realization of considerable building speeds and minor
In the present work, the results of electron beam sintering of a ceramic-metal compact by a focused beam in the medium vacuum pressure range are presented. It is shown that by