Moisture in Metal Powder and Its Implication for Processability in L-PBF and Elsewhere
The impact of moisture on flowability and spreadability is discussed. More notably we also present research on the impact of moisture on built nickel-base material. One lot of a newly opened Hastelloy X (HX) L‑PBF powder was split into two equal batches. One batch was moisturized using a programmabl...
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| Veröffentlicht in: | BHM. Berg- und hüttenmännische Monatshefte 2021, Vol.166 (1), p.33-39 |
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| container_title | BHM. Berg- und hüttenmännische Monatshefte |
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| creator | Mellin, Pelle Rashidi, Masoud Fischer, Marie Nyborg, Lars Marchetti, Lorenzo Hulme-Smith, Christopher Uhlirsch, Markus Strondl, Annika |
| description | The impact of moisture on flowability and spreadability is discussed. More notably we also present research on the impact of moisture on built nickel-base material. One lot of a newly opened Hastelloy X (HX) L‑PBF powder was split into two equal batches. One batch was moisturized using a programmable climate chamber, the other was untreated. We built bars with both batches for mechanical testing, in an EOS M100, with a cold build plate. The moisture content of the two powder batches, before and after the build-jobs, were determined using Karl Fischer titration (KF). Regarding the periodical monitoring of moisture content, it is not needed according to the findings of this paper. More moisture contributes to a slightly higher O‑content in the built material, and in turn, a very slight reduction in impact toughness. If a newly purchased powder exhibits poor flowability or high oxygen content, the analysis using oven-desorption followed by KF is recommended. If the moisture content is high, a drying of the powder is recommended. |
| doi_str_mv | 10.1007/s00501-020-01070-2 |
| format | Article |
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| subjects | Drying ovens Earth and Environmental Science Earth Sciences Hastelloy (trademark) Impact strength Mechanical tests Metal powders Mineral Resources Moisture content Originalarbeit Oxygen content Titration |
| title | Moisture in Metal Powder and Its Implication for Processability in L-PBF and Elsewhere |
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