Surface Tension Measurements of 430 Stainless Steel
- Authors
- Choe, Joongkil; Kim, Han Gyeol; Jeon, Youngjin; Park, Hyeok Jun; Kang, Youngjo; Ozawa, Shumpei; Lee, Joonho
- Issue Date
- 2014
- Publisher
- IRON STEEL INST JAPAN KEIDANREN KAIKAN
- Keywords
- contamination; electromagnetic levitation; oxygen; surface tension; undercooling
- Citation
- ISIJ INTERNATIONAL, v.54, no.9, pp.2104 - 2108
- Indexed
- SCIE
SCOPUS
- Journal Title
- ISIJ INTERNATIONAL
- Volume
- 54
- Number
- 9
- Start Page
- 2104
- End Page
- 2108
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/101178
- DOI
- 10.2355/isijinternational.54.2104
- ISSN
- 0915-1559
- Abstract
- The surface tension of 430 stainless steel was measured using an electromagnetic levitation (EML) method at temperatures of 1 707-2 000 K, under a 5 vol% H-2-He atmosphere. For comparison, the surface tension was also measured using a constrained drop method; specifically the advanced sessile drop method. At 1 823 K, the surface tension of the 430 stainless steel was estimated from the electromagnetic levitation and the constrained drop methods to be 1.802 and 1.614 N/m, respectively. A subsequent analysis of oxygen content showed that the former contained similar to 7 ppm oxygen, whereas the latter had 60 ppm. It was therefore considered that the observed difference in measurements was the result of a contamination by oxygen. Furthermore, the EML experimental results were found to be close to the theoretically calculated values for the Fe-Cr-Si system. Consequently, for complex multi-component commercial steels such as the 430 stainless steel, the levitation method is recommended for the measurement of surface tension.
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