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Deformation-induced center segregation in twin-roll cast high-Mg Al-Mg strips
- Authors
- Kim, Min-Seok; Kim, Su-Hyeon; Kim, Hyoung-Wook
- Issue Date
- Jul-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Al-Mg alloy; Twin-roll casting; Segregation; Kernel average misorientation
- Citation
- SCRIPTA MATERIALIA, v.152, pp.69 - 73
- Journal Title
- SCRIPTA MATERIALIA
- Volume
- 152
- Start Page
- 69
- End Page
- 73
- ISSN
- 1359-6462
- Abstract
- The formation mechanism of center segregation in twin-roll cast (TRC) Al-Mg strips was studied. The center segregation was found to gradually change from channel segregation to a segregation band with increasing casting speed. Deformation induced by the roll separating force (RSF) was the main mechanism of center segregation in the TRC strips. The dilatant behavior of dendrite cells under the RSF appears to be the main mechanism for the formation of segregation band. At relatively low casting speeds, a low compression rate can cause the liquid to squeeze toward the transverse and melt pool directions to form channel segregation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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Related Researcher
- KIM, MINSEOK
- Engineering (Department of Materials Science & Engineering)