Fine structures in Fe3Al alloy layer of a new hot dip aluminized steel |
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| Authors: | LI Yajiang Wang Juan Zhang Yonglan X Holly |
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| Affiliation: | (1) National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, 150001 Harbin, PR China;(2) Key Lab of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, 250061 Jinan, PR China;(3) Computer Engineering Department, University of Northern Virginia, 20147, VA, USA |
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| Abstract: | The fine structure in the Fe-Al alloy layer of a new hot dip aluminized steel (HDA) was examined by means of X-ray diffractometry
(XRD), electron diffraction technique, etc. The test results indicated that the Fe-Al alloy layer of the new aluminized steel
mainly composed of Fe3Al, FeAl and α-Fe (Al) solid solution. There was no brittle phase containing higher aluminum content, such as FeAl3 (59.18% Al) and Fe2Al7 (62–93% Al). The tiny cracks and embrittlement, formerly caused by these brittle phases in the conventional
aluminum-coated steel, were effectively eliminated. There was no microscopic defect (such as tiny cracks, pores or loose layer)
in the coating. This is favourable to resist high temperature oxidation and corrosion of the aluminized steel. |
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| Keywords: | Surface alloying iron aluminides electron diffraction X-ray diffraction (XRD) |
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