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In Situ Detection of Non-metallic Inclusions in Aluminum Melt (1xxx) - Comparison Between a Newly Developed Ultrasonic Technique and LiMCA and PoDFA Method

: Feikus, Friederike; Funken, Florian; Waschkies, Thomas; Bührig-Polaczek, Andreas


Chesonis, Corleen (Ed.) ; The Minerals, Metals and Materials Society -TMS-, Warrendale/Pa.:
Light Metals 2019
Cham: Springer International Publishing, 2019 (The minerals, metals & materials series)
ISBN: 978-3-030-05863-0 (Print)
ISBN: 978-3-030-05864-7 (Online)
ISBN: 978-3-030-05865-4
ISBN: 978-3-030-14603-0
Bundesministerium fur Wirtschaft und Energie BMWi (Deutschland)
IGF; 18061N
Book Article
Fraunhofer IZFP ()
ultrasound inclusion detection; liquid metal cleanliness; LiMCA; PoDFA

An ultrasound-based method for the detection of non-metallic inclusions in cast and wrought aluminum melts is being developed. Main objective of the development is to meet the requirements for a sufficiently fast and precise assessment of the present contamination grade in the melt with a handy and comparatively cheap set-up. First trials, using the Liquid Metal Cleanliness Analyzer (LiMCA) and Porous Disk Filtration Analyzer (PoDFA) method for comparison to evaluate the developed system, showed a very good correlation between the ultrasound results and the reference procedures. Defined types of inclusion particles with specific size ranges were introduced into a base aluminum melt with a purity of 99.8%. The settling curves were monitored by LiMCA and the ultrasonic detector. Furthermore, PoDFA samples were taken at certain points in the process. The trials prove the achievement of a detection limit down to a particle size of 20 μm and a particle concentration of less than 1000 particles per kg aluminum melt.