Expansion of the capability of SEBM by improved electron beam technology › Chair of Materials Science and Engineering for Metals

Commercial available EBSM machines show strong limitations with respect to the beam power, beam quality and beam control. To overcome these limitations, the electron gun and control system of an Arcam S12 System was renewed. The resulting machine is equipped with a 6 kW electron beam gun and a backscattering electron detector for process monitoring. This is the first electron beam AM machine where the electron beam serves for both, processing and analyzing.

Contact:

Prof. Dr.-Ing. habil. Carolin Körner

In-house developed SEBM plant ATHENE
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Electron-optical imaging (ELO) is integrated as an additional process step
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Layer-wise 3D reconstruction of a component from process observation data (enlarge to animate)
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Comparison between 3D reconstruction from process observation data and final component
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Comparison between ELO and X-ray CT of the final component
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In-house developed SEBM plant ATHENE

Electron-optical imaging (ELO) is integrated as an additional process step

Layer-wise 3D reconstruction of a component from process observation data (enlarge to animate)

Comparison between 3D reconstruction from process observation data and final component

Comparison between ELO and X-ray CT of the final component

Publications:

Arnold C., Körner C.:
Electron-optical in-situ metrology for electron beam powder bed fusion: calibration and validation
In: Measurement Science & Technology 33 (2022), Article No.: 014001
ISSN: 0957-0233
DOI: 10.1088/1361-6501/ac2d5c
Arnold C., Breuning C., Körner C.:
Electron-Optical In Situ Imaging for the Assessment of Accuracy in Electron Beam Powder Bed Fusion
In: Materials 14 (2021), Article No.: 7240
ISSN: 1996-1944
DOI: 10.3390/ma14237240
Arnold C., Körner C.:
In-situ electron optical measurement of thermal expansion in electron beam powder bed fusion
In: Additive Manufacturing 46 (2021)
ISSN: 2214-7810
DOI: 10.1016/j.addma.2021.102213
Breuning C., Arnold C., Markl M., Körner C.:
A multivariate meltpool stability criterion for fabrication of complex geometries in electron beam powder bed fusion
In: Additive Manufacturing 45 (2021), Article No.: 102051
ISSN: 2214-7810
DOI: 10.1016/j.addma.2021.102051
Arnold C., Boehm J., Körner C.:
In Operando Monitoring by Analysis of Backscattered Electrons during Electron Beam Melting
In: Advanced Engineering Materials 22 (2019), Article No.: 1901102
ISSN: 1438-1656
DOI: 10.1002/adem.201901102
Pobel C., Arnold C., Osmanlic F., Fu Z., Körner C.:
Immediate development of processing windows for selective electron beam melting using layerwise monitoring via backscattered electron detection
In: Materials Letters 249 (2019), p. 70 - 72
ISSN: 0167-577X
DOI: 10.1016/j.matlet.2019.03.048
Arnold C., Pobel C., Osmanlic F., Körner C.:
Layerwise monitoring of electron beam melting via backscatter electron detection
In: Rapid Prototyping Journal 24 (2018), p. 1401 - 1406
ISSN: 1355-2546
DOI: 10.1108/RPJ-02-2018-0034