EBSD Study of Crystallographic Identification on Fe-Al-Si Intermetallic Phases in Aluminide Coatings on Mild Steels

Wei Jen Cheng; Chaur Jeng Wang

doi:10.4028/www.scientific.net/AMR.79-82.907

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 79-82EBSD Study of Crystallographic Identification on...

EBSD Study of Crystallographic Identification on Fe-Al-Si Intermetallic Phases in Aluminide Coatings on Mild Steels

Abstract:

Mild steels were coated by hot-dipping in molten aluminum and aluminum-silicon baths at 700 °C for 180 seconds. Phase identification of the Fe-Al or Fe-Al-Si intermetallic compounds in the hot-dipped aluminide steel was carried out by using a combination of scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and electron backscatter diffraction (EBSD). The results showed that the aluminide layer of the hot-dipped aluminum steel possessed a thicker intermetallic layer than that of the hot-dipped aluminum-silicon steel which was composed of minor monoclinic FeAl3 and major orthorhombic Fe2Al5. The intermetallic layer of the hot-dipped aluminum-silicon steel was composed of not only the same FeAl3 and Fe2Al5 phases in the hot-dipped aluminum steel but also Fe-Al-Si intermetallic compounds of hexagonal Al7Fe2Si and tetragonal (Al,Si)5Fe3.

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Periodical:

Advanced Materials Research (Volumes 79-82)

Pages:

907-910

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.79-82.907

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Online since:

August 2009

Authors:

Wei Jen Cheng, Chaur Jeng Wang

Keywords:

Aluminide Layer, Electron Backscatter Diffraction (EBSD), Hot-Dipping, Mild Steel, Phase Identification

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