Details
Original language | English |
---|---|
Article number | 102093 |
Journal | Additive Manufacturing |
Volume | 46 |
Early online date | 3 Jun 2021 |
Publication status | Published - Oct 2021 |
Externally published | Yes |
Abstract
The PBF-LB/M (laser-based powder bed fusion of metals) process is associated with high as-built surface roughness and surface texturing caused by a variety of process inherent effects. It is well known that surface roughness is influenced by the applied processing parameters and correlates with porosity. In terms of reactive materials like Ti-6Al-4V, also the powder recycling grade and especially the residual oxygen content within the processing atmosphere play important roles regarding process stability, reproducibility and part properties. Therefore, this study investigated the influence of the residual oxygen content on porosity and surface roughness for virgin as well as recycled powder by employing DoE techniques. Within the examined range, unlike for the roughness, no significant influence of residual oxygen content and powder constitution on porosity could be detected. It could be shown that the reproducibility of relative density mainly depends on the processing parameter combination. Furthermore, powder recycling led to higher top and side surface roughness and a dependence of surface texture on processing parameters could be demonstrated.
Keywords
- Additive manufacturing, Laser-based powder bed fusion of metals, Porosity, Surface roughness, Ti-6Al-4V
ASJC Scopus subject areas
- Engineering(all)
- Biomedical Engineering
- Materials Science(all)
- Engineering(all)
- Engineering (miscellaneous)
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Additive Manufacturing, Vol. 46, 102093, 10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Residual oxygen content and powder recycling
T2 - Effects on surface roughness and porosity of additively manufactured Ti-6Al-4V
AU - Emminghaus, Nicole
AU - Hoff, Christian
AU - Hermsdorf, Jörg
AU - Kaierle, Stefan
N1 - Funding Information: Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 394563137 – SFB 1368 .
PY - 2021/10
Y1 - 2021/10
N2 - The PBF-LB/M (laser-based powder bed fusion of metals) process is associated with high as-built surface roughness and surface texturing caused by a variety of process inherent effects. It is well known that surface roughness is influenced by the applied processing parameters and correlates with porosity. In terms of reactive materials like Ti-6Al-4V, also the powder recycling grade and especially the residual oxygen content within the processing atmosphere play important roles regarding process stability, reproducibility and part properties. Therefore, this study investigated the influence of the residual oxygen content on porosity and surface roughness for virgin as well as recycled powder by employing DoE techniques. Within the examined range, unlike for the roughness, no significant influence of residual oxygen content and powder constitution on porosity could be detected. It could be shown that the reproducibility of relative density mainly depends on the processing parameter combination. Furthermore, powder recycling led to higher top and side surface roughness and a dependence of surface texture on processing parameters could be demonstrated.
AB - The PBF-LB/M (laser-based powder bed fusion of metals) process is associated with high as-built surface roughness and surface texturing caused by a variety of process inherent effects. It is well known that surface roughness is influenced by the applied processing parameters and correlates with porosity. In terms of reactive materials like Ti-6Al-4V, also the powder recycling grade and especially the residual oxygen content within the processing atmosphere play important roles regarding process stability, reproducibility and part properties. Therefore, this study investigated the influence of the residual oxygen content on porosity and surface roughness for virgin as well as recycled powder by employing DoE techniques. Within the examined range, unlike for the roughness, no significant influence of residual oxygen content and powder constitution on porosity could be detected. It could be shown that the reproducibility of relative density mainly depends on the processing parameter combination. Furthermore, powder recycling led to higher top and side surface roughness and a dependence of surface texture on processing parameters could be demonstrated.
KW - Additive manufacturing
KW - Laser-based powder bed fusion of metals
KW - Porosity
KW - Surface roughness
KW - Ti-6Al-4V
UR - http://www.scopus.com/inward/record.url?scp=85107709338&partnerID=8YFLogxK
U2 - 10.1016/j.addma.2021.102093
DO - 10.1016/j.addma.2021.102093
M3 - Article
AN - SCOPUS:85107709338
VL - 46
JO - Additive Manufacturing
JF - Additive Manufacturing
M1 - 102093
ER -