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Moisture in Metal P...
Moisture in Metal Powder and Its Implication for Processability in L-PBF and Elsewhere
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- Mellin, Pelle (author)
- Swerim AB,Powder Metallurgy
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- Rashidi, Masoud (author)
- Chalmers University of Technology
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- Fischer, Marie (author)
- Chalmers University of Technology
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- Nyborg, Lars (author)
- Chalmers University of Technology
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- Marchetti, Lorenzo (author)
- KTH,Processer
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- Hulme-Smith, Christopher, 1989- (author)
- KTH,Processer,Powder metallurgy
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- Uhlirsch, Markus (author)
- Swerim AB,Powder Metallurgy
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- Strondl, Annika (author)
- Swerim AB,Powder MEtallurgy
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: Berg- und Huttenmännische Monatshefte (BHM). - 0005-8912 .- 1613-7531. ; 166:1, s. 33-39
- Related links:
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
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- The impact of moisture on flowability and spread- ability 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 un- treated. We built bars with both batches for mechanical testing, in an EOS M100, with a cold build plate. The mois- ture 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 con- tent, 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 im- pact 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
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- Moisture
- Metal powder
- Laser powder bed fusion
- Spreadability
- Flowability
- Teknisk materialvetenskap
- Materials Science and Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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