Microscopic study on the origin of poor phosphatability in a multi-phase steel
SCIE
SCOPUS
- Title
- Microscopic study on the origin of poor phosphatability in a multi-phase steel
- Authors
- HAN, SANGTAE; Kim, Dong-Hyun; Kang, Kicheol; Park, Jung-Chul; Joe, Jae-Dong; Song, Yonkyun; LEE, JAE SANG; HEO, YOON UK
- Date Issued
- 2021-02
- Publisher
- ELSEVIER SCIENCE INC
- Abstract
- The origin of poor phosphatability in multi-phase steel is studied by various microscopic methods. The effect of the three influential factors that are a phase including compositional difference, crystallographic orientation, and surface oxidation on the zinc phosphate (ZP) formation are investigated by the comparative study of the matrices under the ZP-formed and -missing areas. The inferior ZP formation in bainite/martensite than ferrite is clarified by the analyses of a transmission electron microscopy and an electron backscatter diffraction. The matrix orientation doesn't show apparent deference in the ZP-formed and -missing matrices. The ZP-missing area shows only the enrichment of carbon in the analyses of an electron probe micmanalyzer, an Auger electron spectroscopy, and a secondary ion mass spectrometry. The alloy showed no oxide film at the ZP-missing area due to the pickling process. The poor phosphatability in the multi-phase steel is further discussed on the relatively lower matrix dissolution rate at the carbon-rich bainite/martensite area in the ZP solution.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/104864
- DOI
- 10.1016/j.matchar.2020.110823
- ISSN
- 1044-5803
- Article Type
- Article
- Citation
- MATERIALS CHARACTERIZATION, vol. 172, 2021-02
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- There are no files associated with this item.
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