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1 PublikationContactless generation of cavitation in high temperature liquid metals and its impact on particle dispersion in solidified iron and steel samples
Sarma, M.; Grants, I.; Herrmannsdörfer, T.; Gerbeth, G.
Abstract
A recently developed method for the contactless magnetic generation of cavitation is demonstrated for high-melting-point metals. The approach is based on the floating-zone technique, which is truly contactless and crucible-free as it uses electromagnetic forces. Using this method, ultra-high-temperature ceramic particles, such as TiN, TiB₂ and TiC, are admixed in liquid iron and 316L steel. The dispersion and particle refinement caused by cavitation treatment during melting and solidification are investigated. Magnetic fields up to 8 T that correspond to pressure oscillation amplitude of 0.83 MPa are used. The signal emitted by the collapsing bubbles is captured and visualized for iron melts. Samples with a higher number of cavitation nuclei exhibit a more stable cavitation response. Improved reinforcement refinement is demonstrated for increasing cavitation intensity – the size of precipitates is evidently reduced due to the cavitation
treatment.
Beteiligte Forschungsanlagen
- Hochfeld-Magnetlabor (HLD)
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Journal of Materials Processing Technology 291(2021), 117041
DOI: 10.1016/j.jmatprotec.2021.117041
ISSN: 0924-0136
Cited 2 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-32074