Evaluation of different alloying concepts to trace non-metallic inclusions by adding rare earths on a laboratory scale
Research output: Contribution to journal › Article › Research › peer-review
Standard
In: Ironmaking and steelmaking, Vol. 50.2023, No. 5, 04.10.2022, p. 507-516.
Research output: Contribution to journal › Article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Evaluation of different alloying concepts to trace non-metallic inclusions by adding rare earths on a laboratory scale
AU - Thiele, Kathrin
AU - Presoly, Peter
AU - Ernst, Daniel
AU - Ramesh Babu, Shashank
AU - Michelic, Susanne Katharina
N1 - Publisher Copyright: © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2022/10/4
Y1 - 2022/10/4
N2 - Different alloying concepts to trace deoxidation products, mainly aluminium oxides, using rare earth elements (REEs), were tested on the laboratory scale by melting trials with a high-frequency remelting furnace. Lanthanum and Cerium, which belong to the group of light REEs, were used for these experiments. The formed multiphase inclusions were characterized by scanning electron microscopy with energy dispersive spectroscopy. Concerning the higher atomic numbers of REEs, traced non-metallic inclusions (NMIs) seem brighter than the steel matrix compared to deoxidation products. REE-traced aluminium oxides showed a primarily heterogeneous and almost globular morphology. The mean equivalent circle diameter of REE-containing NMIs is for all trials similar and is about 2 µm. The experimental results pointed out that the recovery rates of the various alloying concepts differ only slightly. In contrast, the values mainly depend on the surface-to-volume ratio and the amount of oxygen in the melt.
AB - Different alloying concepts to trace deoxidation products, mainly aluminium oxides, using rare earth elements (REEs), were tested on the laboratory scale by melting trials with a high-frequency remelting furnace. Lanthanum and Cerium, which belong to the group of light REEs, were used for these experiments. The formed multiphase inclusions were characterized by scanning electron microscopy with energy dispersive spectroscopy. Concerning the higher atomic numbers of REEs, traced non-metallic inclusions (NMIs) seem brighter than the steel matrix compared to deoxidation products. REE-traced aluminium oxides showed a primarily heterogeneous and almost globular morphology. The mean equivalent circle diameter of REE-containing NMIs is for all trials similar and is about 2 µm. The experimental results pointed out that the recovery rates of the various alloying concepts differ only slightly. In contrast, the values mainly depend on the surface-to-volume ratio and the amount of oxygen in the melt.
KW - non-metallic inclusions
KW - steel cleanness
KW - rare earth elements
KW - control technique
KW - formation mechanism
KW - alloying concepts
KW - automated SEM/EDS
UR - https://pure.unileoben.ac.at/portal/en/publications/evaluation-of-different-alloying-concepts-to-trace-nonmetallic-inclusions-by-adding-rare-earths-on-a-laboratory-scale(4d1f27d7-7afd-4060-b15d-e05528bbd233).html
UR - http://www.scopus.com/inward/record.url?scp=85139394071&partnerID=8YFLogxK
U2 - 10.1080/03019233.2022.2124816
DO - 10.1080/03019233.2022.2124816
M3 - Article
VL - 50.2023
SP - 507
EP - 516
JO - Ironmaking and steelmaking
JF - Ironmaking and steelmaking
SN - 0301-9233
IS - 5
ER -
