Journal
POWDER TECHNOLOGY
Volume 384, Issue -, Pages 402-413Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2021.01.074
Keywords
Powder flowability; Steel powders; Comparative flowability testing; Flowability correlation; Powder rheometer
Categories
Funding
- Swedish Governmental Agency for Innovation Systems (Vinnova) [201901087]
Ask authors/readers for more resources
This study compared 8 different flowability testing methods using 11 steel powders and found numerical relationships between certain flowability metrics, such as conditioned bulk density and Hausner ratio. The research highlighted the importance of understanding the correlations between different flowability indicators in powder flow behavior analysis.
The flow behaviour of a powder is critical to its performance in many industrial applications and manufacturing processes. Operations such as powder transfer, die filling and powder spreading all rely on powder flowability. Multiple testing methods can help in assessing flowability, but it is not always clear which may better represent specific flow conditions or how different metrics correlate. This study compares 8 different flowability testing methods using 11 steel powders varying in chemistries and size fractions. Regression analysis was used to test the relationship between each flowability metric obtained. Some metrics, such as the conditioned bulk density, relate to many flowability indicators. Others, such as the basic flowability energy, show poor correlations to other variables, likely describing different aspects of the powder flow behaviour. When two metrics show a strong correlation, as between conditioned bulk density and Hausner ratio, a numerical relationship is derived: CBD = - (5.65 +/- 0.86)HR g cm(-3). (C) 2021 The Author(s). Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available