Melt pool dynamics during selective electron beam melting

Scharowsky, T.; Osmanlic, Fuad; Singer, Robert F.; Körner, Carolin

doi:10.1007/s00339-013-7944-4

Cited by 38 publications

(18 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to the same reason the experimental melt pool widths are higher than the simulated ones. Another reason for the deviations might be that the dynamics of the melt pool [31] can In summary, the experimental results coincide well with the computed melt pool widths in the simulations.…”

Section: Width Of the Melt Poolsupporting

confidence: 73%

See 1 more Smart Citation

Macroscopic simulation and experimental measurement of melt pool characteristics in selective electron beam melting of Ti-6Al-4V

Riedlbauer

Scharowsky

Singer

et al. 2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Selective electron beam melting of Ti-6Al-4V is a promising additive manufacturing process to produce complex parts layer-by-layer additively. The quality and dimensional accuracy of the produced parts depend on various process parameters and their interactions. In the present contribution, the lifetime, width and depth of the pools of molten powder material are analyzed for different beam powers, scan speeds and line energies in experiments and simulations. In the experiments, thin-walled structures are built with an ARCAM AB A2 selective electron beam melting machine and for the simulations a thermal finite element simulation tool is used, which is developed by the authors to simulate the temperature distribution in the selective electron beam melting process. The experimental and numerical results are compared and a good agreement is observed. The lifetime of the melt pool increases linearly with the line energy, whereby the melt pool dimensions show a nonlinear relation with the line energy.

show abstract

Section: Width Of the Melt Poolsupporting

confidence: 73%

“…Solidification is completed if the reflections do not change anymore. The time from the passing of the electron beam until the standstill of the reflections is defined as the life time of the melt pool [31]. On the top in Fig.…”

Section: Determination Of Melt Pool Quantities 41 Lifetime Of the Mementioning

confidence: 99%

Macroscopic simulation and experimental measurement of melt pool characteristics in selective electron beam melting of Ti-6Al-4V

Riedlbauer

Scharowsky

Singer

et al. 2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…20 A phenomenological model to describe the absorption of an electron beam within a powder bed is described in Klassen et al 21 The energy is converted into heat and eventually the powder particles melt, coalesce and form an agitated melt pool for some milliseconds. 6,22 Fluid dynamics is mainly driven by capillary forces and back pressure due to evaporation.…”

Section: Materials Consolidationmentioning

confidence: 99%

Additive manufacturing of metallic components by selective electron beam melting — a review

Körner

2016

International Materials Reviews

Self Cite

736

356

View full text Add to dashboard Cite

Selective electron beam melting (SEBM) belongs to the additive manufacturing technologies which are believed to revolutionise future industrial production. Starting from computer-aided designed data, components are built layer by layer within a powder bed by selectively melting the powder with a high power electron beam. In contrast to selective laser melting (SLM), which can be used for metals, polymers and ceramics, the application field of the electron beam is restricted to metallic components since electric conductivity is required. On the other hand, the electron beam works under vacuum conditions, can be moved at extremely high velocities and a high beam power is available. These features make SEBM especially interesting for the processing of high-performance alloys. The present review describes SEBM with special focus on the relationship between process characteristics, material consolidation and the resulting materials and component properties.

show abstract

“…Due to the short time scale (typical melt pool lifespan is around 12 ms, depending on scanning parameters) in which this takes place not all particles are pushed all the way to the edge of the melt drop and into contact with the solidified portion so that they form the marmorate areas mentioned above. At this state the melt can still show temperatures of around 2000 °C where the surface tension of the liquid copper is lower than at its melting point .…”

Section: Discussionmentioning

confidence: 99%

Selective Electron Beam Melting of Oxide Dispersion Strengthened Copper

Pobel¹,

Lodes²,

Körner³

2018

Adv Eng Mater

View full text Add to dashboard Cite

An oxide dispersion strengthened (ODS) copper powder containing 5 vol% Al 2 O 3 as finely dispersed particles is processed by selective electron beam melting (SEBM), a powder bed based additive manufacturing technology. Contrary to usual powder characteristics used for SEBM, the particles show a non-spherical morphology and a copper oxide layer on their surface. A preheating strategy as well as melting parameters for successful generation of ODS-Cu samples is developed to achieve processability despite the adverse powder conditions. Specimens are built and their meso-and microscale structures are analyzed by optical microscopy (OM) and scanning electron microscopy (SEM) as well as energy dispersive X-ray analyses (EDX). Temperature depending phase separation effects previously encountered in literature during fabrication of ODS-Cu powders are taken into account. [1] Alumina particles were found to coagulate during the process. Partly the Al 2 O 3 was melted and separated from the Cu which resulted in heavy demixing of the system and subsequent loss of dispersion strengthening effect.

show abstract

Melt pool dynamics during selective electron beam melting

Cited by 38 publications

References 3 publications

Macroscopic simulation and experimental measurement of melt pool characteristics in selective electron beam melting of Ti-6Al-4V

Macroscopic simulation and experimental measurement of melt pool characteristics in selective electron beam melting of Ti-6Al-4V

Additive manufacturing of metallic components by selective electron beam melting — a review

Selective Electron Beam Melting of Oxide Dispersion Strengthened Copper

Contact Info

Product

Resources

About