Measurement of Non-Metallic Inclusions in the Size Range of 10–20μm by LiMCA

Badowski, Mark; Instone, Stephen

doi:10.1007/978-3-319-48179-1_186

Cited by 1 publication

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“…[23] Al 4 C 3 particles are usually very fine and cannot be detected by LiMCA since it is not capable of measuring the particles below 17 microns with standard setups. [24] Therefore, the LiMCA curve presents predominantly the films in pure melts. The added spinel oxide particles were clearly detected by PoDFA.…”

Section: A Characterization Of the Inclusions Present In A 998 Pct mentioning

confidence: 99%

Shape Factor Effect on Inclusion Sedimentation in Aluminum Melts

Gökelma

Einarsrud

Tranell

et al. 2020

Metall Mater Trans B

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The quality requirements of aluminum products are steadily increasing, and the presence of non-metallic inclusions have a large impact on the quality of aluminum products. Sedimentation is a widely applied technique to remove inclusions and the settling characteristic of particles is one of the most important parameters determining the removal efficiency. The settling characteristics can be modeled analytically through different approaches. A comparison of settling according to the Stokes and Schiller and Naumann drag force formulations was investigated and showed that Stokes drag is relevant for inclusions in aluminum melts. The settling of particles is analytically and experimentally investigated in this study by using a shape factor “K” based on Stokes law and online particle tracking by LiMCA (Liquid Metal Cleanliness Analyzer), respectively. The effect of the shape factor on settling velocities was observed clearly and the measured data show considerably slower settling than traditional models, indicating the effect of melt flow due to thermal convection.

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Section: A Characterization Of the Inclusions Present In A 998 Pct mentioning

confidence: 99%