Influences of carbon and silicon on blister formation in scale surface during high temperature oxidation of carbon steels
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- Title
- Influences of carbon and silicon on blister formation in scale surface during high temperature oxidation of carbon steels
- Authors
- Kim, Deuk-Jung; Lee, Jae-Sang; Koo, Yang-Mo
- Date Issued
- 2017-07
- Publisher
- The Korean Institute of Metals and Materials
- Abstract
- The in-situ blistering phenomena of the scale ‘surface’ was investigated on three carbon steels with respect to carbonand silicon concentrations, such as 0.05 wt%C, 0.2 wt%C, and 0.2 wt%C-0.2 wt%Si. The oxidation and blisteringkinetics and blister area fraction during high temperature oxidation were analyzed. The average thickness ofthe surface scale by oxidation during isothermal holding from 800 to 1200°C in dry air was observed to decreasewhen the amount of carbon increased and/or when Si was inserted additionally. Thus, the blistering behaviordepended primarily on a change in oxidation temperature (Tox) as well as amounts of carbon and silicon in thematrix. It is also revealed that such blister formation would be triggered by growth of internal stress and active generationsof CO and/or CO2 gases at the interface between the scale and matrix since carbon would result in anincrease in the blister formation by generating CO and/or CO2 gas. In addition, silicon might play an important rolein preventing the blister formation at Tox below 900°C by reducing the thickness of the surface scale whilst siliconmight enhance the blister formation by means of the appreciable micro-void formation in the scale layer at Toxhigher 900 °C.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/39220
- DOI
- 10.1007/s12540-017-6741-6
- ISSN
- 1598-9623
- Article Type
- Article
- Citation
- Metals and Materials International, vol. 23, no. 4, page. 715 - 719, 2017-07
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