Use of a Fracture Surface Cleaning Method to Evaluate Elevated Temperature Cracking in Steel
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The nature of cracking during continuous casting of steel strip was investigated. Samples removed from steel strip for fractographic analysis were heavily oxidized, preventing effective evaluation of the fracture surface. In order to remove the oxidation from the fracture surface, a modification of a procedure developed by Kayafas (Corrosion 36(8):443–445, 1980) was used. Pre- and post-cleaning SEM fractographs illustrated the effectiveness of the cleaning method. The results show that the fracture surface cleaning method successfully removes the surface oxide without compromising the original fracture surface. Using this method, the intergranular nature of the cracking that occurs during strip casting was clearly delineated.
KeywordsFailure analysis Cracking Electron fractography Fractography Steel High temperature
The authors would like to thank Wal Blejde, Rama Mahapatra, Mark Schlichting, and Tao Wang from NUCOR Castrip for providing the samples and enriching discussion in this study.
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