| Download | - View author's version: Metal powder flowability: effect of humidity and impact on the reproducibility of the measurements (PDF, 1.3 MiB)
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| Author | Search for: Lefebvre, L. P.1; Search for: Dai, J.1; Search for: Thomas, Y.1; Search for: Martinez-Rubi, Y.2 |
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| Affiliation | - National Research Council of Canada. Automotive and Surface Transportation
- National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Conference | AMPM 2019: Additive Manufacturing with Powder Metallurgy Conference, 23-25 June 2019, Phoenix, USA |
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| Abstract | Additive manufacturing (AM) community recognizes the importance of powder flowability on the productivity and the quality of printed parts. However, there is no agreement on what constitutes a good flow. Indeed, machine users have reported that powders appearing to be identical may exhibit different spreading behavior in the machines. Flowability depends on different factors and significant variability has been reported when evaluating the flow behavior of powders. Thus, there is a need to develop reliable and relevant methods to quantify powder flow. One of the important factors affecting flowability is the relative humidity. However, the impact of humidity on the flowability of AM powders has not been well documented and current flowability standards are not clear on how to take this effect into account. This paper presents the impact of relative humidity on the flowability of titanium powder using various tests. The effect of relative humidity is not clear as the sensitivity of the measurement techniques to moisture uptake varies significantly. This paper also compares different methods to measure the water content of a titanium powder and the impact of measurement conditions on the results. |
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| Publication date | 2019-06 |
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| Publisher | Metal Powder Industries Federation |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRC-AST-83 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | d4f8be86-6437-4dca-aac7-579cc044e594 |
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| Record created | 2019-07-17 |
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| Record modified | 2020-03-16 |
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