Al2MgC2 and AlFe3C formation in AZ91 Mg alloy melted in Fe-C crucibles
File(s)
Accepted version
Author(s)
Peng, L
Zeng, G
Lin, CJ
Gourlay, CM
Type
Journal Article
Abstract
Magnesium alloys are commonly melted and held in steel or cast iron crucibles and small but important amounts of Fe and C can dissolve into Mg-rich melts. Here, carbide formation is studied during interface reactions between solid Fe-xC alloys (x = 0–3.6 wt%) and liquid Mg-9Al-0.7Zn-0.2Mn (wt.%, AZ91) at temperatures from 700 to 800 °C. Two ternary carbides, AlFe3C and Al2MgC2, formed in the reaction layers between the Fe-C and AZ91, and T2-Al2MgC2 additionally formed within the AZ91 alloy due to carbon pickup. T2-Al2MgC2 grew in liquid AZ91 as hexagonal plates that were commonly twinned. A reproducible orientation relationship was measured between T2-Al2MgC2 and α-Mg, and the grain refinement of magnesium by heterogeneous nucleation on T2-Al2MgC2 is explored.
Date Issued
2021-02-15
Date Acceptance
2020-07-14
Citation
Journal of Alloys and Compounds, 2021, 854, pp.1-13
ISSN
0925-8388
Publisher
Elsevier BV
Start Page
1
End Page
13
Journal / Book Title
Journal of Alloys and Compounds
Volume
854
Copyright Statement
© 2020 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://www.sciencedirect.com/science/article/pii/S0925838820327791?via%3Dihub
Grant Number
EP/M002241/1
Subjects
0204 Condensed Matter Physics
0912 Materials Engineering
0914 Resources Engineering and Extractive Metallurgy
Materials
Publication Status
Published
Article Number
ARTN 156415
Date Publish Online
2020-08-04