2024-03-29T09:00:54Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00028391
2023-01-16T04:21:11Z
320:321:322
Formation sequence of Fe–Al intermetallic phases at interface between solid Fe and liquid Zn–6Al–3Mg alloy
Yokoi, Hiroki
92891
Takata, Naoki
92892
Suzuki, Asuka
92893
Kobashi, Makoto
92894
Galvanized steels
Zn–Al–Mg alloy coating
Interfacial reaction
Thermodynamic calculation
Fe2Al5 phase
In the present study, we characterized the Fe–Al intermetallic phases formed in interstitial-free (IF) steel hot-dipped in a Zn–6Al–3Mg (wt.%) alloy melt at different temperatures (400, 460 and 500 °C) and dipping times (from 2 to 3600 s). Chemical composition analyses indicated Fe dissolution into the Zn alloy melt even after 2 s of dipping. Microstructural characterization revealed the initial formation of a continuous θ-Fe4Al13 phase layer, followed by the local growth of η-Fe2Al5 phase toward both steel and Zn alloy melt sides during the hot-dipping process. After long-term hot-dipping, further growth of the η phase was accompanied by significant dissolution of Fe into the Zn alloy melt, resulting in the loss of thickness of the IF steel sheets. Altogether, we rationalized the formation mechanism of Fe–Al intermetallic phases and their associated growth at the interface between solid Fe and liquid Zn alloy in terms of a Zn–Al–Mg–Fe quaternary phase diagram, calculated according to thermodynamic database available in the literature.
ファイル公開:2021-06-01
journal article
Elsevier
2019-06
application/pdf
Intermetallics
109
74
84
0966-9795
https://nagoya.repo.nii.ac.jp/record/28391/files/INTERMETALLICS_2019_52.pdf
eng
https://doi.org/10.1016/j.intermet.2019.03.011
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/